Rework of the PTP support series core code

Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
@@ -487,7 +487,7 @@ static int sgi_clock_get(clockid_t clock
 	return 0;
 };
 
-static int sgi_clock_set(clockid_t clockid, struct timespec *tp)
+static int sgi_clock_set(const clockid_t clockid, const struct timespec *tp)
 {
 
 	u64 nsec;

Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
@@ -69,7 +69,8 @@ struct k_itimer {
 struct k_clock {
 	int res;		/* in nanoseconds */
 	int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
-	int (*clock_set) (const clockid_t which_clock, struct timespec * tp);
+	int (*clock_set) (const clockid_t which_clock,
+			  const struct timespec *tp);
 	int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
 	int (*timer_create) (struct k_itimer *timer);
 	int (*nsleep) (const clockid_t which_clock, int flags,

@@ -89,7 +90,7 @@ void register_posix_clock(const clockid_
 /* error handlers for timer_create, nanosleep and settime */
 int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
 			       struct timespec __user *);
-int do_posix_clock_nosettime(const clockid_t, struct timespec *tp);
+int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
 
 /* function to call to trigger timer event */
 int posix_timer_event(struct k_itimer *timr, int si_private);

Index: linux-2.6-tip/include/linux/security.h
===================================================================
@@ -53,7 +53,7 @@ struct audit_krule;
  */
 extern int cap_capable(struct task_struct *tsk, const struct cred *cred,
 		       int cap, int audit);
-extern int cap_settime(struct timespec *ts, struct timezone *tz);
+extern int cap_settime(const struct timespec *ts, const struct timezone *tz);
 extern int cap_ptrace_access_check(struct task_struct *child, unsigned int mode);
 extern int cap_ptrace_traceme(struct task_struct *parent);
 extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);

@@ -1387,7 +1387,7 @@ struct security_operations {
 	int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
 	int (*quota_on) (struct dentry *dentry);
 	int (*syslog) (int type);
-	int (*settime) (struct timespec *ts, struct timezone *tz);
+	int (*settime) (const struct timespec *ts, const struct timezone *tz);
 	int (*vm_enough_memory) (struct mm_struct *mm, long pages);
 
 	int (*bprm_set_creds) (struct linux_binprm *bprm);

@@ -1669,7 +1669,7 @@ int security_sysctl(struct ctl_table *ta
 int security_quotactl(int cmds, int type, int id, struct super_block *sb);
 int security_quota_on(struct dentry *dentry);
 int security_syslog(int type);
-int security_settime(struct timespec *ts, struct timezone *tz);
+int security_settime(const struct timespec *ts, const struct timezone *tz);
 int security_vm_enough_memory(long pages);
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
 int security_vm_enough_memory_kern(long pages);

@@ -1904,7 +1904,8 @@ static inline int security_syslog(int ty
 	return 0;
 }
 
-static inline int security_settime(struct timespec *ts, struct timezone *tz)
+static inline int security_settime(const struct timespec *ts,
+				   const struct timezone *tz)
 {
 	return cap_settime(ts, tz);
 }

Index: linux-2.6-tip/include/linux/time.h
===================================================================
@@ -145,8 +145,9 @@ static inline u32 arch_gettimeoffset(voi
 #endif
 
 extern void do_gettimeofday(struct timeval *tv);
-extern int do_settimeofday(struct timespec *tv);
-extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
+extern int do_settimeofday(const struct timespec *tv);
+extern int do_sys_settimeofday(const struct timespec *tv,
+			       const struct timezone *tz);
 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
 extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
 struct itimerval;

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -192,7 +192,7 @@ static int common_clock_get(clockid_t wh
 }
 
 static inline int common_clock_set(const clockid_t which_clock,
-				   struct timespec *tp)
+				   const struct timespec *tp)
 {
 	return do_sys_settimeofday(tp, NULL);
 }

@@ -928,7 +928,7 @@ void exit_itimers(struct signal_struct *
 }
 
 /* Not available / possible... functions */
-int do_posix_clock_nosettime(const clockid_t clockid, struct timespec *tp)
+int do_posix_clock_nosettime(const clockid_t clockid, const struct timespec *tp)
 {
 	return -EINVAL;
 }

Index: linux-2.6-tip/kernel/time.c
===================================================================
@@ -150,7 +150,7 @@ static inline void warp_clock(void)
  * various programs will get confused when the clock gets warped.
  */
 
-int do_sys_settimeofday(struct timespec *tv, struct timezone *tz)
+int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
 {
 	static int firsttime = 1;
 	int error = 0;

Index: linux-2.6-tip/kernel/time/timekeeping.c
===================================================================
@@ -353,7 +353,7 @@ EXPORT_SYMBOL(do_gettimeofday);
  *
  * Sets the time of day to the new time and update NTP and notify hrtimers
  */
-int do_settimeofday(struct timespec *tv)
+int do_settimeofday(const struct timespec *tv)
 {
 	struct timespec ts_delta;
 	unsigned long flags;

Index: linux-2.6-tip/security/commoncap.c
===================================================================
@@ -93,7 +93,7 @@ int cap_capable(struct task_struct *tsk,
  * Determine whether the current process may set the system clock and timezone
  * information, returning 0 if permission granted, -ve if denied.
  */
-int cap_settime(struct timespec *ts, struct timezone *tz)
+int cap_settime(const struct timespec *ts, const struct timezone *tz)
 {
 	if (!capable(CAP_SYS_TIME))
 		return -EPERM;

Index: linux-2.6-tip/security/security.c
===================================================================
@@ -202,7 +202,7 @@ int security_syslog(int type)
 	return security_ops->syslog(type);
 }
 
-int security_settime(struct timespec *ts, struct timezone *tz)
+int security_settime(const struct timespec *ts, const struct timezone *tz)
 {
 	return security_ops->settime(ts, tz);
 }

index e6d7562..ecd0082 100644
@@ -487,7 +487,7 @@ static int sgi_clock_get(clockid_t clockid, struct timespec *tp)
 	return 0;
 };
 
-static int sgi_clock_set(clockid_t clockid, struct timespec *tp)
+static int sgi_clock_set(const clockid_t clockid, const struct timespec *tp)
 {
 
 	u64 nsec;

index 3e23844a..b2c14cb 100644
@@ -69,7 +69,8 @@ struct k_itimer {
 struct k_clock {
 	int res;		/* in nanoseconds */
 	int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
-	int (*clock_set) (const clockid_t which_clock, struct timespec * tp);
+	int (*clock_set) (const clockid_t which_clock,
+			  const struct timespec *tp);
 	int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
 	int (*timer_create) (struct k_itimer *timer);
 	int (*nsleep) (const clockid_t which_clock, int flags,

@@ -89,7 +90,7 @@ void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 /* error handlers for timer_create, nanosleep and settime */
 int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
 			       struct timespec __user *);
-int do_posix_clock_nosettime(const clockid_t, struct timespec *tp);
+int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
 
 /* function to call to trigger timer event */
 int posix_timer_event(struct k_itimer *timr, int si_private);

index c642bb8..c096aa6 100644
@@ -53,7 +53,7 @@ struct audit_krule;
  */
 extern int cap_capable(struct task_struct *tsk, const struct cred *cred,
 		       int cap, int audit);
-extern int cap_settime(struct timespec *ts, struct timezone *tz);
+extern int cap_settime(const struct timespec *ts, const struct timezone *tz);
 extern int cap_ptrace_access_check(struct task_struct *child, unsigned int mode);
 extern int cap_ptrace_traceme(struct task_struct *parent);
 extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);

@@ -1387,7 +1387,7 @@ struct security_operations {
 	int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
 	int (*quota_on) (struct dentry *dentry);
 	int (*syslog) (int type);
-	int (*settime) (struct timespec *ts, struct timezone *tz);
+	int (*settime) (const struct timespec *ts, const struct timezone *tz);
 	int (*vm_enough_memory) (struct mm_struct *mm, long pages);
 
 	int (*bprm_set_creds) (struct linux_binprm *bprm);

@@ -1669,7 +1669,7 @@ int security_sysctl(struct ctl_table *table, int op);
 int security_quotactl(int cmds, int type, int id, struct super_block *sb);
 int security_quota_on(struct dentry *dentry);
 int security_syslog(int type);
-int security_settime(struct timespec *ts, struct timezone *tz);
+int security_settime(const struct timespec *ts, const struct timezone *tz);
 int security_vm_enough_memory(long pages);
 int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
 int security_vm_enough_memory_kern(long pages);

@@ -1904,7 +1904,8 @@ static inline int security_syslog(int type)
 	return 0;
 }
 
-static inline int security_settime(struct timespec *ts, struct timezone *tz)
+static inline int security_settime(const struct timespec *ts,
+				   const struct timezone *tz)
 {
 	return cap_settime(ts, tz);
 }

index 38c5206..7c44e77 100644
@@ -145,8 +145,9 @@ static inline u32 arch_gettimeoffset(void) { return 0; }
 #endif
 
 extern void do_gettimeofday(struct timeval *tv);
-extern int do_settimeofday(struct timespec *tv);
-extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
+extern int do_settimeofday(const struct timespec *tv);
+extern int do_sys_settimeofday(const struct timespec *tv,
+			       const struct timezone *tz);
 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
 extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
 struct itimerval;

index 93bd2eb..21b7ca2 100644
@@ -192,7 +192,7 @@ static int common_clock_get(clockid_t which_clock, struct timespec *tp)
 }
 
 static inline int common_clock_set(const clockid_t which_clock,
-				   struct timespec *tp)
+				   const struct timespec *tp)
 {
 	return do_sys_settimeofday(tp, NULL);
 }

@@ -928,7 +928,7 @@ void exit_itimers(struct signal_struct *sig)
 }
 
 /* Not available / possible... functions */
-int do_posix_clock_nosettime(const clockid_t clockid, struct timespec *tp)
+int do_posix_clock_nosettime(const clockid_t clockid, const struct timespec *tp)
 {
 	return -EINVAL;
 }

index a31b512..5cb8053 100644
@@ -150,7 +150,7 @@ static inline void warp_clock(void)
  * various programs will get confused when the clock gets warped.
  */
 
-int do_sys_settimeofday(struct timespec *tv, struct timezone *tz)
+int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
 {
 	static int firsttime = 1;
 	int error = 0;

index 02c13a3..4f9f65b 100644
@@ -353,7 +353,7 @@ EXPORT_SYMBOL(do_gettimeofday);
  *
  * Sets the time of day to the new time and update NTP and notify hrtimers
  */
-int do_settimeofday(struct timespec *tv)
+int do_settimeofday(const struct timespec *tv)
 {
 	struct timespec ts_delta;
 	unsigned long flags;

index 64c2ed9..dbfdaed 100644
@@ -93,7 +93,7 @@ int cap_capable(struct task_struct *tsk, const struct cred *cred, int cap,
  * Determine whether the current process may set the system clock and timezone
  * information, returning 0 if permission granted, -ve if denied.
  */
-int cap_settime(struct timespec *ts, struct timezone *tz)
+int cap_settime(const struct timespec *ts, const struct timezone *tz)
 {
 	if (!capable(CAP_SYS_TIME))
 		return -EPERM;

index 739e403..b995428 100644
@@ -202,7 +202,7 @@ int security_syslog(int type)
 	return security_ops->syslog(type);
 }
 
-int security_settime(struct timespec *ts, struct timezone *tz)
+int security_settime(const struct timespec *ts, const struct timezone *tz)
 {
 	return security_ops->settime(ts, tz);
 }

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -81,6 +81,14 @@ static DEFINE_SPINLOCK(idr_lock);
 #error "SIGEV_THREAD_ID must not share bit with other SIGEV values!"
 #endif
 
+/*
+ * parisc wants ENOTSUP instead of EOPNOTSUPP
+ */
+#ifndef ENOTSUP
+# define ENANOSLEEP_NOTSUP EOPNOTSUPP
+#else
+# define ENANOSLEEP_NOTSUP ENOTSUP
+#endif
 
 /*
  * The timer ID is turned into a timer address by idr_find().

@@ -937,11 +945,7 @@ EXPORT_SYMBOL_GPL(do_posix_clock_nosetti
 int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
 			       struct timespec *t, struct timespec __user *r)
 {
-#ifndef ENOTSUP
-	return -EOPNOTSUPP;	/* aka ENOTSUP in userland for POSIX */
-#else  /*  parisc does define it separately.  */
-	return -ENOTSUP;
-#endif
+	return -ENANOSLEEP_NOTSUP;
 }
 EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
 

index 21b7ca2..89bff37 100644
@@ -81,6 +81,14 @@ static DEFINE_SPINLOCK(idr_lock);
 #error "SIGEV_THREAD_ID must not share bit with other SIGEV values!"
 #endif
 
+/*
+ * parisc wants ENOTSUP instead of EOPNOTSUPP
+ */
+#ifndef ENOTSUP
+# define ENANOSLEEP_NOTSUP EOPNOTSUPP
+#else
+# define ENANOSLEEP_NOTSUP ENOTSUP
+#endif
 
 /*
  * The timer ID is turned into a timer address by idr_find().

@@ -937,11 +945,7 @@ EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
 int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
 			       struct timespec *t, struct timespec __user *r)
 {
-#ifndef ENOTSUP
-	return -EOPNOTSUPP;	/* aka ENOTSUP in userland for POSIX */
-#else  /*  parisc does define it separately.  */
-	return -ENOTSUP;
-#endif
+	return -ENANOSLEEP_NOTSUP;
 }
 EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
 

Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
@@ -765,13 +765,13 @@ static int sgi_timer_set(struct k_itimer
 
 static struct k_clock sgi_clock = {
 	.res = 0,
-	.clock_set = sgi_clock_set,
-	.clock_get = sgi_clock_get,
-	.timer_create = sgi_timer_create,
-	.nsleep = do_posix_clock_nonanosleep,
-	.timer_set = sgi_timer_set,
-	.timer_del = sgi_timer_del,
-	.timer_get = sgi_timer_get
+	.clock_set	= sgi_clock_set,
+	.clock_get	= sgi_clock_get,
+	.timer_create	= sgi_timer_create,
+	.nsleep		= do_posix_clock_nonanosleep,
+	.timer_set	= sgi_timer_set,
+	.timer_del	= sgi_timer_del,
+	.timer_get	= sgi_timer_get
 };
 
 /**

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
@@ -1607,20 +1607,20 @@ static long thread_cpu_nsleep_restart(st
 static __init int init_posix_cpu_timers(void)
 {
 	struct k_clock process = {
-		.clock_getres = process_cpu_clock_getres,
-		.clock_get = process_cpu_clock_get,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = process_cpu_timer_create,
-		.nsleep = process_cpu_nsleep,
-		.nsleep_restart = process_cpu_nsleep_restart,
+		.clock_getres	= process_cpu_clock_getres,
+		.clock_get	= process_cpu_clock_get,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= process_cpu_timer_create,
+		.nsleep		= process_cpu_nsleep,
+		.nsleep_restart	= process_cpu_nsleep_restart,
 	};
 	struct k_clock thread = {
-		.clock_getres = thread_cpu_clock_getres,
-		.clock_get = thread_cpu_clock_get,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = thread_cpu_timer_create,
-		.nsleep = thread_cpu_nsleep,
-		.nsleep_restart = thread_cpu_nsleep_restart,
+		.clock_getres	= thread_cpu_clock_getres,
+		.clock_get	= thread_cpu_clock_get,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= thread_cpu_timer_create,
+		.nsleep		= thread_cpu_nsleep,
+		.nsleep_restart	= thread_cpu_nsleep_restart,
 	};
 	struct timespec ts;
 

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -281,33 +281,33 @@ static int posix_get_coarse_res(const cl
 static __init int init_posix_timers(void)
 {
 	struct k_clock clock_realtime = {
-		.clock_getres = hrtimer_get_res,
+		.clock_getres	= hrtimer_get_res,
 	};
 	struct k_clock clock_monotonic = {
-		.clock_getres = hrtimer_get_res,
-		.clock_get = posix_ktime_get_ts,
-		.clock_set = do_posix_clock_nosettime,
+		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_ktime_get_ts,
+		.clock_set	= do_posix_clock_nosettime,
 	};
 	struct k_clock clock_monotonic_raw = {
-		.clock_getres = hrtimer_get_res,
-		.clock_get = posix_get_monotonic_raw,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_get_monotonic_raw,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_realtime_coarse = {
-		.clock_getres = posix_get_coarse_res,
-		.clock_get = posix_get_realtime_coarse,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= posix_get_coarse_res,
+		.clock_get	= posix_get_realtime_coarse,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_monotonic_coarse = {
-		.clock_getres = posix_get_coarse_res,
-		.clock_get = posix_get_monotonic_coarse,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= posix_get_coarse_res,
+		.clock_get	= posix_get_monotonic_coarse,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

index ecd0082..fd51cd8 100644
@@ -765,13 +765,13 @@ static int sgi_timer_set(struct k_itimer *timr, int flags,
 
 static struct k_clock sgi_clock = {
 	.res = 0,
-	.clock_set = sgi_clock_set,
-	.clock_get = sgi_clock_get,
-	.timer_create = sgi_timer_create,
-	.nsleep = do_posix_clock_nonanosleep,
-	.timer_set = sgi_timer_set,
-	.timer_del = sgi_timer_del,
-	.timer_get = sgi_timer_get
+	.clock_set	= sgi_clock_set,
+	.clock_get	= sgi_clock_get,
+	.timer_create	= sgi_timer_create,
+	.nsleep		= do_posix_clock_nonanosleep,
+	.timer_set	= sgi_timer_set,
+	.timer_del	= sgi_timer_del,
+	.timer_get	= sgi_timer_get
 };
 
 /**

index 05bb717..11b91dc 100644
@@ -1607,20 +1607,20 @@ static long thread_cpu_nsleep_restart(struct restart_block *restart_block)
 static __init int init_posix_cpu_timers(void)
 {
 	struct k_clock process = {
-		.clock_getres = process_cpu_clock_getres,
-		.clock_get = process_cpu_clock_get,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = process_cpu_timer_create,
-		.nsleep = process_cpu_nsleep,
-		.nsleep_restart = process_cpu_nsleep_restart,
+		.clock_getres	= process_cpu_clock_getres,
+		.clock_get	= process_cpu_clock_get,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= process_cpu_timer_create,
+		.nsleep		= process_cpu_nsleep,
+		.nsleep_restart	= process_cpu_nsleep_restart,
 	};
 	struct k_clock thread = {
-		.clock_getres = thread_cpu_clock_getres,
-		.clock_get = thread_cpu_clock_get,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = thread_cpu_timer_create,
-		.nsleep = thread_cpu_nsleep,
-		.nsleep_restart = thread_cpu_nsleep_restart,
+		.clock_getres	= thread_cpu_clock_getres,
+		.clock_get	= thread_cpu_clock_get,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= thread_cpu_timer_create,
+		.nsleep		= thread_cpu_nsleep,
+		.nsleep_restart	= thread_cpu_nsleep_restart,
 	};
 	struct timespec ts;
 

index 89bff37..e7d26af 100644
@@ -281,33 +281,33 @@ static int posix_get_coarse_res(const clockid_t which_clock, struct timespec *tp
 static __init int init_posix_timers(void)
 {
 	struct k_clock clock_realtime = {
-		.clock_getres = hrtimer_get_res,
+		.clock_getres	= hrtimer_get_res,
 	};
 	struct k_clock clock_monotonic = {
-		.clock_getres = hrtimer_get_res,
-		.clock_get = posix_ktime_get_ts,
-		.clock_set = do_posix_clock_nosettime,
+		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_ktime_get_ts,
+		.clock_set	= do_posix_clock_nosettime,
 	};
 	struct k_clock clock_monotonic_raw = {
-		.clock_getres = hrtimer_get_res,
-		.clock_get = posix_get_monotonic_raw,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_get_monotonic_raw,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_realtime_coarse = {
-		.clock_getres = posix_get_coarse_res,
-		.clock_get = posix_get_realtime_coarse,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= posix_get_coarse_res,
+		.clock_get	= posix_get_realtime_coarse,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_monotonic_coarse = {
-		.clock_getres = posix_get_coarse_res,
-		.clock_get = posix_get_monotonic_coarse,
-		.clock_set = do_posix_clock_nosettime,
-		.timer_create = no_timer_create,
-		.nsleep = no_nsleep,
+		.clock_getres	= posix_get_coarse_res,
+		.clock_get	= posix_get_monotonic_coarse,
+		.clock_set	= do_posix_clock_nosettime,
+		.timer_create	= no_timer_create,
+		.nsleep		= no_nsleep,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
@@ -85,6 +85,8 @@ struct k_clock {
 			   struct itimerspec * cur_setting);
 };
 
+extern struct k_clock clock_posix_cpu;
+
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
 /* error handlers for timer_create, nanosleep and settime */

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
@@ -1604,6 +1604,18 @@ static long thread_cpu_nsleep_restart(st
 	return -EINVAL;
 }
 
+struct k_clock clock_posix_cpu = {
+	.clock_getres	= posix_cpu_clock_getres,
+	.clock_set	= posix_cpu_clock_set,
+	.clock_get	= posix_cpu_clock_get,
+	.timer_create	= posix_cpu_timer_create,
+	.nsleep		= posix_cpu_nsleep,
+	.nsleep_restart	= posix_cpu_nsleep_restart,
+	.timer_set	= posix_cpu_timer_set,
+	.timer_del	= posix_cpu_timer_del,
+	.timer_get	= posix_cpu_timer_get,
+};
+
 static __init int init_posix_cpu_timers(void)
 {
 	struct k_clock process = {

index b2c14cb..1330ff3 100644
@@ -85,6 +85,8 @@ struct k_clock {
 			   struct itimerspec * cur_setting);
 };
 
+extern struct k_clock clock_posix_cpu;
+
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
 /* error handlers for timer_create, nanosleep and settime */

index 11b91dc..816cd49 100644
@@ -1604,6 +1604,18 @@ static long thread_cpu_nsleep_restart(struct restart_block *restart_block)
 	return -EINVAL;
 }
 
+struct k_clock clock_posix_cpu = {
+	.clock_getres	= posix_cpu_clock_getres,
+	.clock_set	= posix_cpu_clock_set,
+	.clock_get	= posix_cpu_clock_get,
+	.timer_create	= posix_cpu_timer_create,
+	.nsleep		= posix_cpu_nsleep,
+	.nsleep_restart	= posix_cpu_nsleep_restart,
+	.timer_set	= posix_cpu_timer_set,
+	.timer_del	= posix_cpu_timer_del,
+	.timer_get	= posix_cpu_timer_get,
+};
+
 static __init int init_posix_cpu_timers(void)
 {
 	struct k_clock process = {

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -531,6 +531,16 @@ static void release_posix_timer(struct k
 	kmem_cache_free(posix_timers_cache, tmr);
 }
 
+static struct k_clock *clockid_to_kclock(const clockid_t id)
+{
+	if (id < 0)
+		return &clock_posix_cpu;
+
+	if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres)
+		return NULL;
+	return &posix_clocks[id];
+}
+
 /* Create a POSIX.1b interval timer. */
 
 SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,

index e7d26af..14b0a70 100644
@@ -531,6 +531,16 @@ static void release_posix_timer(struct k_itimer *tmr, int it_id_set)
 	kmem_cache_free(posix_timers_cache, tmr);
 }
 
+static struct k_clock *clockid_to_kclock(const clockid_t id)
+{
+	if (id < 0)
+		return &clock_posix_cpu;
+
+	if (id >= MAX_CLOCKS || !posix_clocks[id].clock_getres)
+		return NULL;
+	return &posix_clocks[id];
+}
+
 /* Create a POSIX.1b interval timer. */
 
 SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,

Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
@@ -768,7 +768,6 @@ static struct k_clock sgi_clock = {
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
 	.timer_create	= sgi_timer_create,
-	.nsleep		= do_posix_clock_nonanosleep,
 	.timer_set	= sgi_timer_set,
 	.timer_del	= sgi_timer_del,
 	.timer_get	= sgi_timer_get

Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
@@ -90,8 +90,6 @@ extern struct k_clock clock_posix_cpu;
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
 /* error handlers for timer_create, nanosleep and settime */
-int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
-			       struct timespec __user *);
 int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
 
 /* function to call to trigger timer event */

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -216,12 +216,6 @@ static int no_timer_create(struct k_itim
 	return -EOPNOTSUPP;
 }
 
-static int no_nsleep(const clockid_t which_clock, int flags,
-		     struct timespec *tsave, struct timespec __user *rmtp)
-{
-	return -EOPNOTSUPP;
-}
-
 /*
  * Return nonzero if we know a priori this clockid_t value is bogus.
  */

@@ -282,32 +276,31 @@ static __init int init_posix_timers(void
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.nsleep		= common_nsleep,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.clock_set	= do_posix_clock_nosettime,
+		.nsleep		= common_nsleep,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

@@ -952,13 +945,6 @@ int do_posix_clock_nosettime(const clock
 }
 EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
 
-int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
-			       struct timespec *t, struct timespec __user *r)
-{
-	return -ENANOSLEEP_NOTSUP;
-}
-EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
-
 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 		const struct timespec __user *, tp)
 {

@@ -1023,10 +1009,13 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
 		const struct timespec __user *, rqtp,
 		struct timespec __user *, rmtp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec t;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
+	if (!kc->nsleep)
+		return -ENANOSLEEP_NOTSUP;
 
 	if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
 		return -EFAULT;

@@ -1034,8 +1023,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
 	if (!timespec_valid(&t))
 		return -EINVAL;
 
-	return CLOCK_DISPATCH(which_clock, nsleep,
-			      (which_clock, flags, &t, rmtp));
+	return kc->nsleep(which_clock, flags, &t, rmtp);
 }
 
 /*

index fd51cd8..262d104 100644
@@ -768,7 +768,6 @@ static struct k_clock sgi_clock = {
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
 	.timer_create	= sgi_timer_create,
-	.nsleep		= do_posix_clock_nonanosleep,
 	.timer_set	= sgi_timer_set,
 	.timer_del	= sgi_timer_del,
 	.timer_get	= sgi_timer_get

index 1330ff3..cd6da06 100644
@@ -90,8 +90,6 @@ extern struct k_clock clock_posix_cpu;
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
 /* error handlers for timer_create, nanosleep and settime */
-int do_posix_clock_nonanosleep(const clockid_t, int flags, struct timespec *,
-			       struct timespec __user *);
 int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
 
 /* function to call to trigger timer event */

index 14b0a70..ee69b21 100644
@@ -216,12 +216,6 @@ static int no_timer_create(struct k_itimer *new_timer)
 	return -EOPNOTSUPP;
 }
 
-static int no_nsleep(const clockid_t which_clock, int flags,
-		     struct timespec *tsave, struct timespec __user *rmtp)
-{
-	return -EOPNOTSUPP;
-}
-
 /*
  * Return nonzero if we know a priori this clockid_t value is bogus.
  */

@@ -282,32 +276,31 @@ static __init int init_posix_timers(void)
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.nsleep		= common_nsleep,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.clock_set	= do_posix_clock_nosettime,
+		.nsleep		= common_nsleep,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
-		.nsleep		= no_nsleep,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

@@ -952,13 +945,6 @@ int do_posix_clock_nosettime(const clockid_t clockid, const struct timespec *tp)
 }
 EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
 
-int do_posix_clock_nonanosleep(const clockid_t clock, int flags,
-			       struct timespec *t, struct timespec __user *r)
-{
-	return -ENANOSLEEP_NOTSUP;
-}
-EXPORT_SYMBOL_GPL(do_posix_clock_nonanosleep);
-
 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 		const struct timespec __user *, tp)
 {

@@ -1023,10 +1009,13 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
 		const struct timespec __user *, rqtp,
 		struct timespec __user *, rmtp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec t;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
+	if (!kc->nsleep)
+		return -ENANOSLEEP_NOTSUP;
 
 	if (copy_from_user(&t, rqtp, sizeof (struct timespec)))
 		return -EFAULT;

@@ -1034,8 +1023,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
 	if (!timespec_valid(&t))
 		return -EINVAL;
 
-	return CLOCK_DISPATCH(which_clock, nsleep,
-			      (which_clock, flags, &t, rmtp));
+	return kc->nsleep(which_clock, flags, &t, rmtp);
 }
 
 /*

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -277,12 +277,14 @@ static __init int init_posix_timers(void
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
 		.nsleep		= common_nsleep,
+		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.clock_set	= do_posix_clock_nosettime,
 		.nsleep		= common_nsleep,
+		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,

@@ -1027,22 +1029,13 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
 }
 
 /*
- * nanosleep_restart for monotonic and realtime clocks
- */
-static int common_nsleep_restart(struct restart_block *restart_block)
-{
-	return hrtimer_nanosleep_restart(restart_block);
-}
-
-/*
  * This will restart clock_nanosleep. This is required only by
  * compat_clock_nanosleep_restart for now.
  */
-long
-clock_nanosleep_restart(struct restart_block *restart_block)
+long clock_nanosleep_restart(struct restart_block *restart_block)
 {
 	clockid_t which_clock = restart_block->arg0;
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 
-	return CLOCK_DISPATCH(which_clock, nsleep_restart,
-			      (restart_block));
+	return kc->nsleep_restart(restart_block);
 }

index ee69b21..4dd86d1 100644
@@ -277,12 +277,14 @@ static __init int init_posix_timers(void)
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
 		.nsleep		= common_nsleep,
+		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.clock_set	= do_posix_clock_nosettime,
 		.nsleep		= common_nsleep,
+		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,

@@ -1027,22 +1029,16 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
 }
 
 /*
- * nanosleep_restart for monotonic and realtime clocks
- */
-static int common_nsleep_restart(struct restart_block *restart_block)
-{
-	return hrtimer_nanosleep_restart(restart_block);
-}
-
-/*
  * This will restart clock_nanosleep. This is required only by
  * compat_clock_nanosleep_restart for now.
  */
-long
-clock_nanosleep_restart(struct restart_block *restart_block)
+long clock_nanosleep_restart(struct restart_block *restart_block)
 {
 	clockid_t which_clock = restart_block->arg0;
+	struct k_clock *kc = clockid_to_kclock(which_clock);
+
+	if (WARN_ON_ONCE(!kc || !kc->nsleep_restart))
+		return -EINVAL;
 
-	return CLOCK_DISPATCH(which_clock, nsleep_restart,
-			      (restart_block));
+	return kc->nsleep_restart(restart_block);
 }

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
@@ -1485,7 +1485,7 @@ int posix_cpu_nsleep(const clockid_t whi
 		     struct timespec *rqtp, struct timespec __user *rmtp)
 {
 	struct restart_block *restart_block =
-	    &current_thread_info()->restart_block;
+		&current_thread_info()->restart_block;
 	struct itimerspec it;
 	int error;
 

@@ -1501,50 +1501,42 @@ int posix_cpu_nsleep(const clockid_t whi
 
 	if (error == -ERESTART_RESTARTBLOCK) {
 
-	       	if (flags & TIMER_ABSTIME)
+		if (flags & TIMER_ABSTIME)
 			return -ERESTARTNOHAND;
 		/*
-	 	 * Report back to the user the time still remaining.
-	 	 */
-		if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+		 * Report back to the user the time still remaining.
+		 */
+		if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
 			return -EFAULT;
 
 		restart_block->fn = posix_cpu_nsleep_restart;
-		restart_block->arg0 = which_clock;
-		restart_block->arg1 = (unsigned long) rmtp;
-		restart_block->arg2 = rqtp->tv_sec;
-		restart_block->arg3 = rqtp->tv_nsec;
+		restart_block->nanosleep.index = which_clock;
+		restart_block->nanosleep.rmtp = rmtp;
+		restart_block->nanosleep.expires = timespec_to_ns(rqtp);
 	}
 	return error;
 }
 
 long posix_cpu_nsleep_restart(struct restart_block *restart_block)
 {
-	clockid_t which_clock = restart_block->arg0;
-	struct timespec __user *rmtp;
+	clockid_t which_clock = restart_block->nanosleep.index;
 	struct timespec t;
 	struct itimerspec it;
 	int error;
 
-	rmtp = (struct timespec __user *) restart_block->arg1;
-	t.tv_sec = restart_block->arg2;
-	t.tv_nsec = restart_block->arg3;
+	t = ns_to_timespec(restart_block->nanosleep.expires);
 
-	restart_block->fn = do_no_restart_syscall;
 	error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it);
 
 	if (error == -ERESTART_RESTARTBLOCK) {
+		struct timespec __user *rmtp = restart_block->nanosleep.rmtp;
 		/*
-	 	 * Report back to the user the time still remaining.
-	 	 */
-		if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+		 * Report back to the user the time still remaining.
+		 */
+		if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
 			return -EFAULT;
 
-		restart_block->fn = posix_cpu_nsleep_restart;
-		restart_block->arg0 = which_clock;
-		restart_block->arg1 = (unsigned long) rmtp;
-		restart_block->arg2 = t.tv_sec;
-		restart_block->arg3 = t.tv_nsec;
+		restart_block->nanosleep.expires = timespec_to_ns(&t);
 	}
 	return error;
 

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -1034,7 +1034,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const c
  */
 long clock_nanosleep_restart(struct restart_block *restart_block)
 {
-	clockid_t which_clock = restart_block->arg0;
+	clockid_t which_clock = restart_block->nanosleep.index;
 	struct k_clock *kc = clockid_to_kclock(which_clock);
 
 	return kc->nsleep_restart(restart_block);

index 816cd49..9e617b0 100644
@@ -1485,7 +1485,7 @@ int posix_cpu_nsleep(const clockid_t which_clock, int flags,
 		     struct timespec *rqtp, struct timespec __user *rmtp)
 {
 	struct restart_block *restart_block =
-	    &current_thread_info()->restart_block;
+		&current_thread_info()->restart_block;
 	struct itimerspec it;
 	int error;
 

@@ -1501,50 +1501,42 @@ int posix_cpu_nsleep(const clockid_t which_clock, int flags,
 
 	if (error == -ERESTART_RESTARTBLOCK) {
 
-	       	if (flags & TIMER_ABSTIME)
+		if (flags & TIMER_ABSTIME)
 			return -ERESTARTNOHAND;
 		/*
-	 	 * Report back to the user the time still remaining.
-	 	 */
-		if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+		 * Report back to the user the time still remaining.
+		 */
+		if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
 			return -EFAULT;
 
 		restart_block->fn = posix_cpu_nsleep_restart;
-		restart_block->arg0 = which_clock;
-		restart_block->arg1 = (unsigned long) rmtp;
-		restart_block->arg2 = rqtp->tv_sec;
-		restart_block->arg3 = rqtp->tv_nsec;
+		restart_block->nanosleep.index = which_clock;
+		restart_block->nanosleep.rmtp = rmtp;
+		restart_block->nanosleep.expires = timespec_to_ns(rqtp);
 	}
 	return error;
 }
 
 long posix_cpu_nsleep_restart(struct restart_block *restart_block)
 {
-	clockid_t which_clock = restart_block->arg0;
-	struct timespec __user *rmtp;
+	clockid_t which_clock = restart_block->nanosleep.index;
 	struct timespec t;
 	struct itimerspec it;
 	int error;
 
-	rmtp = (struct timespec __user *) restart_block->arg1;
-	t.tv_sec = restart_block->arg2;
-	t.tv_nsec = restart_block->arg3;
+	t = ns_to_timespec(restart_block->nanosleep.expires);
 
-	restart_block->fn = do_no_restart_syscall;
 	error = do_cpu_nanosleep(which_clock, TIMER_ABSTIME, &t, &it);
 
 	if (error == -ERESTART_RESTARTBLOCK) {
+		struct timespec __user *rmtp = restart_block->nanosleep.rmtp;
 		/*
-	 	 * Report back to the user the time still remaining.
-	 	 */
-		if (rmtp != NULL && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
+		 * Report back to the user the time still remaining.
+		 */
+		if (rmtp && copy_to_user(rmtp, &it.it_value, sizeof *rmtp))
 			return -EFAULT;
 
-		restart_block->fn = posix_cpu_nsleep_restart;
-		restart_block->arg0 = which_clock;
-		restart_block->arg1 = (unsigned long) rmtp;
-		restart_block->arg2 = t.tv_sec;
-		restart_block->arg3 = t.tv_nsec;
+		restart_block->nanosleep.expires = timespec_to_ns(&t);
 	}
 	return error;
 

index 4dd86d1..4762986 100644
@@ -1034,7 +1034,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
  */
 long clock_nanosleep_restart(struct restart_block *restart_block)
 {
-	clockid_t which_clock = restart_block->arg0;
+	clockid_t which_clock = restart_block->nanosleep.index;
 	struct k_clock *kc = clockid_to_kclock(which_clock);
 
 	if (WARN_ON_ONCE(!kc || !kc->nsleep_restart))

Index: linux-2.6-tip/include/linux/thread_info.h
===================================================================
@@ -18,9 +18,6 @@ struct compat_timespec;
 struct restart_block {
 	long (*fn)(struct restart_block *);
 	union {
-		struct {
-			unsigned long arg0, arg1, arg2, arg3;
-		};
 		/* For futex_wait and futex_wait_requeue_pi */
 		struct {
 			u32 __user *uaddr;

index c906965..20fc303 100644
@@ -18,9 +18,6 @@ struct compat_timespec;
 struct restart_block {
 	long (*fn)(struct restart_block *);
 	union {
-		struct {
-			unsigned long arg0, arg1, arg2, arg3;
-		};
 		/* For futex_wait and futex_wait_requeue_pi */
 		struct {
 			u32 __user *uaddr;

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
@@ -1586,15 +1586,6 @@ static int thread_cpu_timer_create(struc
 	timer->it_clock = THREAD_CLOCK;
 	return posix_cpu_timer_create(timer);
 }
-static int thread_cpu_nsleep(const clockid_t which_clock, int flags,
-			      struct timespec *rqtp, struct timespec __user *rmtp)
-{
-	return -EINVAL;
-}
-static long thread_cpu_nsleep_restart(struct restart_block *restart_block)
-{
-	return -EINVAL;
-}
 
 struct k_clock clock_posix_cpu = {
 	.clock_getres	= posix_cpu_clock_getres,

@@ -1623,8 +1614,6 @@ static __init int init_posix_cpu_timers(
 		.clock_get	= thread_cpu_clock_get,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= thread_cpu_timer_create,
-		.nsleep		= thread_cpu_nsleep,
-		.nsleep_restart	= thread_cpu_nsleep_restart,
 	};
 	struct timespec ts;
 

index 9e617b0..8dc4cd7 100644
@@ -1586,15 +1586,6 @@ static int thread_cpu_timer_create(struct k_itimer *timer)
 	timer->it_clock = THREAD_CLOCK;
 	return posix_cpu_timer_create(timer);
 }
-static int thread_cpu_nsleep(const clockid_t which_clock, int flags,
-			      struct timespec *rqtp, struct timespec __user *rmtp)
-{
-	return -EINVAL;
-}
-static long thread_cpu_nsleep_restart(struct restart_block *restart_block)
-{
-	return -EINVAL;
-}
 
 struct k_clock clock_posix_cpu = {
 	.clock_getres	= posix_cpu_clock_getres,

@@ -1623,8 +1614,6 @@ static __init int init_posix_cpu_timers(void)
 		.clock_get	= thread_cpu_clock_get,
 		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= thread_cpu_timer_create,
-		.nsleep		= thread_cpu_nsleep,
-		.nsleep_restart	= thread_cpu_nsleep_restart,
 	};
 	struct timespec ts;
 

Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
@@ -89,9 +89,6 @@ extern struct k_clock clock_posix_cpu;
 
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
-/* error handlers for timer_create, nanosleep and settime */
-int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
-
 /* function to call to trigger timer event */
 int posix_timer_event(struct k_itimer *timr, int si_private);
 

Index: linux-2.6-tip/kernel/posix-cpu-timers.c
===================================================================
@@ -1604,7 +1604,6 @@ static __init int init_posix_cpu_timers(
 	struct k_clock process = {
 		.clock_getres	= process_cpu_clock_getres,
 		.clock_get	= process_cpu_clock_get,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= process_cpu_timer_create,
 		.nsleep		= process_cpu_nsleep,
 		.nsleep_restart	= process_cpu_nsleep_restart,

@@ -1612,7 +1611,6 @@ static __init int init_posix_cpu_timers(
 	struct k_clock thread = {
 		.clock_getres	= thread_cpu_clock_getres,
 		.clock_get	= thread_cpu_clock_get,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= thread_cpu_timer_create,
 	};
 	struct timespec ts;

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -199,12 +199,6 @@ static int common_clock_get(clockid_t wh
 	return 0;
 }
 
-static inline int common_clock_set(const clockid_t which_clock,
-				   const struct timespec *tp)
-{
-	return do_sys_settimeofday(tp, NULL);
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -232,6 +226,13 @@ static inline int invalid_clockid(const 
 	return 1;
 }
 
+/* Set clock_realtime */
+static inline int posix_clock_realtime_set(const clockid_t which_clock,
+					   const struct timespec *tp)
+{
+	return do_sys_settimeofday(tp, NULL);
+}
+
 /*
  * Get monotonic time for posix timers
  */

@@ -276,32 +277,29 @@ static __init int init_posix_timers(void
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
-		.clock_set	= do_posix_clock_nosettime,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 

@@ -940,24 +938,19 @@ void exit_itimers(struct signal_struct *
 	}
 }
 
-/* Not available / possible... functions */
-int do_posix_clock_nosettime(const clockid_t clockid, const struct timespec *tp)
-{
-	return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
-
 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 		const struct timespec __user *, tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec new_tp;
 
-	if (invalid_clockid(which_clock))
+	if (!kc || !kc->clock_set)
 		return -EINVAL;
+
 	if (copy_from_user(&new_tp, tp, sizeof (*tp)))
 		return -EFAULT;
 
-	return CLOCK_DISPATCH(which_clock, clock_set, (which_clock, &new_tp));
+	return kc->clock_set(which_clock, &new_tp);
 }
 
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,

index cd6da06..4aaf0c5 100644
@@ -89,9 +89,6 @@ extern struct k_clock clock_posix_cpu;
 
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock);
 
-/* error handlers for timer_create, nanosleep and settime */
-int do_posix_clock_nosettime(const clockid_t, const struct timespec *tp);
-
 /* function to call to trigger timer event */
 int posix_timer_event(struct k_itimer *timr, int si_private);
 

index 8dc4cd7..504fbab 100644
@@ -1604,7 +1604,6 @@ static __init int init_posix_cpu_timers(void)
 	struct k_clock process = {
 		.clock_getres	= process_cpu_clock_getres,
 		.clock_get	= process_cpu_clock_get,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= process_cpu_timer_create,
 		.nsleep		= process_cpu_nsleep,
 		.nsleep_restart	= process_cpu_nsleep_restart,

@@ -1612,7 +1611,6 @@ static __init int init_posix_cpu_timers(void)
 	struct k_clock thread = {
 		.clock_getres	= thread_cpu_clock_getres,
 		.clock_get	= thread_cpu_clock_get,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= thread_cpu_timer_create,
 	};
 	struct timespec ts;

index 4762986..49f358c 100644
@@ -199,12 +199,6 @@ static int common_clock_get(clockid_t which_clock, struct timespec *tp)
 	return 0;
 }
 
-static inline int common_clock_set(const clockid_t which_clock,
-				   const struct timespec *tp)
-{
-	return do_sys_settimeofday(tp, NULL);
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -232,6 +226,13 @@ static inline int invalid_clockid(const clockid_t which_clock)
 	return 1;
 }
 
+/* Set clock_realtime */
+static int posix_clock_realtime_set(const clockid_t which_clock,
+				    const struct timespec *tp)
+{
+	return do_sys_settimeofday(tp, NULL);
+}
+
 /*
  * Get monotonic time for posix timers
  */

@@ -276,32 +277,29 @@ static __init int init_posix_timers(void)
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
-		.clock_set	= do_posix_clock_nosettime,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
-		.clock_set	= do_posix_clock_nosettime,
 		.timer_create	= no_timer_create,
 	};
 

@@ -940,24 +938,19 @@ void exit_itimers(struct signal_struct *sig)
 	}
 }
 
-/* Not available / possible... functions */
-int do_posix_clock_nosettime(const clockid_t clockid, const struct timespec *tp)
-{
-	return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(do_posix_clock_nosettime);
-
 SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 		const struct timespec __user *, tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec new_tp;
 
-	if (invalid_clockid(which_clock))
+	if (!kc || !kc->clock_set)
 		return -EINVAL;
+
 	if (copy_from_user(&new_tp, tp, sizeof (*tp)))
 		return -EFAULT;
 
-	return CLOCK_DISPATCH(which_clock, clock_set, (which_clock, &new_tp));
+	return kc->clock_set(which_clock, &new_tp);
 }
 
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -190,15 +190,6 @@ static inline int common_clock_getres(co
 	return 0;
 }
 
-/*
- * Get real time for posix timers
- */
-static int common_clock_get(clockid_t which_clock, struct timespec *tp)
-{
-	ktime_get_real_ts(tp);
-	return 0;
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -226,6 +217,13 @@ static inline int invalid_clockid(const 
 	return 1;
 }
 
+/* Get clock_realtime */
+static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp)
+{
+	ktime_get_real_ts(tp);
+	return 0;
+}
+
 /* Set clock_realtime */
 static inline int posix_clock_realtime_set(const clockid_t which_clock,
 					   const struct timespec *tp)

@@ -277,6 +275,7 @@ static __init int init_posix_timers(void
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_clock_realtime_get,
 		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,

@@ -956,18 +955,21 @@ SYSCALL_DEFINE2(clock_settime, const clo
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
 		struct timespec __user *,tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec kernel_tp;
 	int error;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
-	error = CLOCK_DISPATCH(which_clock, clock_get,
-			       (which_clock, &kernel_tp));
+	if (!kc->clock_get)
+		return -EOPNOTSUPP;
+
+	error = kc->clock_get(which_clock, &kernel_tp);
+
 	if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
 		error = -EFAULT;
 
 	return error;
-
 }
 
 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,

index 49f358c..d9e5edf 100644
@@ -190,15 +190,6 @@ static inline int common_clock_getres(const clockid_t which_clock,
 	return 0;
 }
 
-/*
- * Get real time for posix timers
- */
-static int common_clock_get(clockid_t which_clock, struct timespec *tp)
-{
-	ktime_get_real_ts(tp);
-	return 0;
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -226,6 +217,13 @@ static inline int invalid_clockid(const clockid_t which_clock)
 	return 1;
 }
 
+/* Get clock_realtime */
+static int posix_clock_realtime_get(clockid_t which_clock, struct timespec *tp)
+{
+	ktime_get_real_ts(tp);
+	return 0;
+}
+
 /* Set clock_realtime */
 static int posix_clock_realtime_set(const clockid_t which_clock,
 				    const struct timespec *tp)

@@ -277,6 +275,7 @@ static __init int init_posix_timers(void)
 {
 	struct k_clock clock_realtime = {
 		.clock_getres	= hrtimer_get_res,
+		.clock_get	= posix_clock_realtime_get,
 		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,

@@ -956,18 +955,21 @@ SYSCALL_DEFINE2(clock_settime, const clockid_t, which_clock,
 SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
 		struct timespec __user *,tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec kernel_tp;
 	int error;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
-	error = CLOCK_DISPATCH(which_clock, clock_get,
-			       (which_clock, &kernel_tp));
+	if (!kc->clock_get)
+		return -EOPNOTSUPP;
+
+	error = kc->clock_get(which_clock, &kernel_tp);
+
 	if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
 		error = -EFAULT;
 
 	return error;
-
 }
 
 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,

Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
@@ -53,6 +53,8 @@ MODULE_LICENSE("GPL");
 
 #define RTC_BITS 55 /* 55 bits for this implementation */
 
+static struct k_clock sgi_clock;
+
 extern unsigned long sn_rtc_cycles_per_second;
 
 #define RTC_COUNTER_ADDR        ((long *)LOCAL_MMR_ADDR(SH_RTC))

@@ -763,10 +765,18 @@ static int sgi_timer_set(struct k_itimer
 	return err;
 }
 
+static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp)
+{
+	tp->tv_sec = 0;
+	tp->tv_nsec = sgi_clock.res;
+	return 0;
+}
+
 static struct k_clock sgi_clock = {
 	.res = 0,
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
+	.clock_getres	= sgi_clock_getres,
 	.timer_create	= sgi_timer_create,
 	.timer_set	= sgi_timer_set,
 	.timer_del	= sgi_timer_del,

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -182,14 +182,6 @@ static inline void unlock_timer(struct k
  * the function pointer CALL in struct k_clock.
  */
 
-static inline int common_clock_getres(const clockid_t which_clock,
-				      struct timespec *tp)
-{
-	tp->tv_sec = 0;
-	tp->tv_nsec = posix_clocks[which_clock].res;
-	return 0;
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -975,18 +967,17 @@ SYSCALL_DEFINE2(clock_gettime, const clo
 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
 		struct timespec __user *, tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec rtn_tp;
 	int error;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
 
-	error = CLOCK_DISPATCH(which_clock, clock_getres,
-			       (which_clock, &rtn_tp));
+	error = kc->clock_getres(which_clock, &rtn_tp);
 
-	if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) {
+	if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
 		error = -EFAULT;
-	}
 
 	return error;
 }

index 262d104..141ffae 100644
@@ -53,6 +53,8 @@ MODULE_LICENSE("GPL");
 
 #define RTC_BITS 55 /* 55 bits for this implementation */
 
+static struct k_clock sgi_clock;
+
 extern unsigned long sn_rtc_cycles_per_second;
 
 #define RTC_COUNTER_ADDR        ((long *)LOCAL_MMR_ADDR(SH_RTC))

@@ -763,10 +765,18 @@ static int sgi_timer_set(struct k_itimer *timr, int flags,
 	return err;
 }
 
+static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp)
+{
+	tp->tv_sec = 0;
+	tp->tv_nsec = sgi_clock.res;
+	return 0;
+}
+
 static struct k_clock sgi_clock = {
 	.res = 0,
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
+	.clock_getres	= sgi_clock_getres,
 	.timer_create	= sgi_timer_create,
 	.timer_set	= sgi_timer_set,
 	.timer_del	= sgi_timer_del,

index 7f66143..748497f 100644
@@ -182,14 +182,6 @@ static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
  * the function pointer CALL in struct k_clock.
  */
 
-static inline int common_clock_getres(const clockid_t which_clock,
-				      struct timespec *tp)
-{
-	tp->tv_sec = 0;
-	tp->tv_nsec = posix_clocks[which_clock].res;
-	return 0;
-}
-
 static int common_timer_create(struct k_itimer *new_timer)
 {
 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);

@@ -984,18 +976,17 @@ SYSCALL_DEFINE2(clock_gettime, const clockid_t, which_clock,
 SYSCALL_DEFINE2(clock_getres, const clockid_t, which_clock,
 		struct timespec __user *, tp)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct timespec rtn_tp;
 	int error;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
 
-	error = CLOCK_DISPATCH(which_clock, clock_getres,
-			       (which_clock, &rtn_tp));
+	error = kc->clock_getres(which_clock, &rtn_tp);
 
-	if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) {
+	if (!error && tp && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
 		error = -EFAULT;
-	}
 
 	return error;
 }

Index: linux-2.6-tip/drivers/char/mmtimer.c
===================================================================
@@ -768,12 +768,11 @@ static int sgi_timer_set(struct k_itimer
 static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp)
 {
 	tp->tv_sec = 0;
-	tp->tv_nsec = sgi_clock.res;
+	tp->tv_nsec = sgi_clock_period;
 	return 0;
 }
 
 static struct k_clock sgi_clock = {
-	.res = 0,
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
 	.clock_getres	= sgi_clock_getres,

@@ -840,7 +839,7 @@ static int __init mmtimer_init(void)
 			(unsigned long) node);
 	}
 
-	sgi_clock_period = sgi_clock.res = NSEC_PER_SEC / sn_rtc_cycles_per_second;
+	sgi_clock_period = NSEC_PER_SEC / sn_rtc_cycles_per_second;
 	register_posix_clock(CLOCK_SGI_CYCLE, &sgi_clock);
 
 	printk(KERN_INFO "%s: v%s, %ld MHz\n", MMTIMER_DESC, MMTIMER_VERSION,

Index: linux-2.6-tip/include/linux/posix-timers.h
===================================================================
@@ -67,7 +67,6 @@ struct k_itimer {
 };
 
 struct k_clock {
-	int res;		/* in nanoseconds */
 	int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
 	int (*clock_set) (const clockid_t which_clock,
 			  const struct timespec *tp);

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -204,8 +204,6 @@ static inline int invalid_clockid(const 
 		return 1;
 	if (posix_clocks[which_clock].clock_getres != NULL)
 		return 0;
-	if (posix_clocks[which_clock].res != 0)
-		return 0;
 	return 1;
 }
 

index 141ffae..ff41eb3 100644
@@ -768,12 +768,11 @@ static int sgi_timer_set(struct k_itimer *timr, int flags,
 static int sgi_clock_getres(const clockid_t which_clock, struct timespec *tp)
 {
 	tp->tv_sec = 0;
-	tp->tv_nsec = sgi_clock.res;
+	tp->tv_nsec = sgi_clock_period;
 	return 0;
 }
 
 static struct k_clock sgi_clock = {
-	.res = 0,
 	.clock_set	= sgi_clock_set,
 	.clock_get	= sgi_clock_get,
 	.clock_getres	= sgi_clock_getres,

@@ -840,7 +839,7 @@ static int __init mmtimer_init(void)
 			(unsigned long) node);
 	}
 
-	sgi_clock_period = sgi_clock.res = NSEC_PER_SEC / sn_rtc_cycles_per_second;
+	sgi_clock_period = NSEC_PER_SEC / sn_rtc_cycles_per_second;
 	register_posix_clock(CLOCK_SGI_CYCLE, &sgi_clock);
 
 	printk(KERN_INFO "%s: v%s, %ld MHz\n", MMTIMER_DESC, MMTIMER_VERSION,

index 4aaf0c5..ef574d1 100644
@@ -67,7 +67,6 @@ struct k_itimer {
 };
 
 struct k_clock {
-	int res;		/* in nanoseconds */
 	int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
 	int (*clock_set) (const clockid_t which_clock,
 			  const struct timespec *tp);

index 748497f..f9142a9 100644
@@ -204,8 +204,6 @@ static inline int invalid_clockid(const clockid_t which_clock)
 		return 1;
 	if (posix_clocks[which_clock].clock_getres != NULL)
 		return 0;
-	if (posix_clocks[which_clock].res != 0)
-		return 0;
 	return 1;
 }
 

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -146,6 +146,7 @@ static struct k_clock posix_clocks[MAX_C
  */
 static int common_nsleep(const clockid_t, int flags, struct timespec *t,
 			 struct timespec __user *rmtp);
+static int common_timer_create(struct k_itimer *new_timer);
 static void common_timer_get(struct k_itimer *, struct itimerspec *);
 static int common_timer_set(struct k_itimer *, int,
 			    struct itimerspec *, struct itimerspec *);

@@ -175,25 +176,6 @@ static inline void unlock_timer(struct k
  	  ? (*posix_clocks[clock].call) arglist : common_##call arglist))
 
 /*
- * Default clock hook functions when the struct k_clock passed
- * to register_posix_clock leaves a function pointer null.
- *
- * The function common_CALL is the default implementation for
- * the function pointer CALL in struct k_clock.
- */
-
-static int common_timer_create(struct k_itimer *new_timer)
-{
-	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
-	return 0;
-}
-
-static int no_timer_create(struct k_itimer *new_timer)
-{
-	return -EOPNOTSUPP;
-}
-
-/*
  * Return nonzero if we know a priori this clockid_t value is bogus.
  */
 static inline int invalid_clockid(const clockid_t which_clock)

@@ -269,27 +251,26 @@ static __init int init_posix_timers(void
 		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
+		.timer_create	= common_timer_create,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
+		.timer_create	= common_timer_create,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
-		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
-		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
-		.timer_create	= no_timer_create,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

@@ -523,19 +504,28 @@ static struct k_clock *clockid_to_kclock
 	return &posix_clocks[id];
 }
 
+static int common_timer_create(struct k_itimer *new_timer)
+{
+	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
+	return 0;
+}
+
 /* Create a POSIX.1b interval timer. */
 
 SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 		struct sigevent __user *, timer_event_spec,
 		timer_t __user *, created_timer_id)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct k_itimer *new_timer;
 	int error, new_timer_id;
 	sigevent_t event;
 	int it_id_set = IT_ID_NOT_SET;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
+	if (!kc->timer_create)
+		return -EOPNOTSUPP;
 
 	new_timer = alloc_posix_timer();
 	if (unlikely(!new_timer))

@@ -597,7 +587,7 @@ SYSCALL_DEFINE3(timer_create, const cloc
 		goto out;
 	}
 
-	error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
+	error = kc->timer_create(new_timer);
 	if (error)
 		goto out;
 

@@ -607,7 +597,7 @@ SYSCALL_DEFINE3(timer_create, const cloc
 	spin_unlock_irq(&current->sighand->siglock);
 
 	return 0;
- 	/*
+	/*
 	 * In the case of the timer belonging to another task, after
 	 * the task is unlocked, the timer is owned by the other task
 	 * and may cease to exist at any time.  Don't use or modify

index f9142a9..4f71382 100644
@@ -146,6 +146,7 @@ static struct k_clock posix_clocks[MAX_CLOCKS];
  */
 static int common_nsleep(const clockid_t, int flags, struct timespec *t,
 			 struct timespec __user *rmtp);
+static int common_timer_create(struct k_itimer *new_timer);
 static void common_timer_get(struct k_itimer *, struct itimerspec *);
 static int common_timer_set(struct k_itimer *, int,
 			    struct itimerspec *, struct itimerspec *);

@@ -175,25 +176,6 @@ static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
  	  ? (*posix_clocks[clock].call) arglist : common_##call arglist))
 
 /*
- * Default clock hook functions when the struct k_clock passed
- * to register_posix_clock leaves a function pointer null.
- *
- * The function common_CALL is the default implementation for
- * the function pointer CALL in struct k_clock.
- */
-
-static int common_timer_create(struct k_itimer *new_timer)
-{
-	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
-	return 0;
-}
-
-static int no_timer_create(struct k_itimer *new_timer)
-{
-	return -EOPNOTSUPP;
-}
-
-/*
  * Return nonzero if we know a priori this clockid_t value is bogus.
  */
 static inline int invalid_clockid(const clockid_t which_clock)

@@ -269,27 +251,26 @@ static __init int init_posix_timers(void)
 		.clock_set	= posix_clock_realtime_set,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
+		.timer_create	= common_timer_create,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_ktime_get_ts,
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
+		.timer_create	= common_timer_create,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,
 		.clock_get	= posix_get_monotonic_raw,
-		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_realtime_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_realtime_coarse,
-		.timer_create	= no_timer_create,
 	};
 	struct k_clock clock_monotonic_coarse = {
 		.clock_getres	= posix_get_coarse_res,
 		.clock_get	= posix_get_monotonic_coarse,
-		.timer_create	= no_timer_create,
 	};
 
 	register_posix_clock(CLOCK_REALTIME, &clock_realtime);

@@ -534,19 +515,28 @@ static struct k_clock *clockid_to_kclock(const clockid_t id)
 	return &posix_clocks[id];
 }
 
+static int common_timer_create(struct k_itimer *new_timer)
+{
+	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
+	return 0;
+}
+
 /* Create a POSIX.1b interval timer. */
 
 SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 		struct sigevent __user *, timer_event_spec,
 		timer_t __user *, created_timer_id)
 {
+	struct k_clock *kc = clockid_to_kclock(which_clock);
 	struct k_itimer *new_timer;
 	int error, new_timer_id;
 	sigevent_t event;
 	int it_id_set = IT_ID_NOT_SET;
 
-	if (invalid_clockid(which_clock))
+	if (!kc)
 		return -EINVAL;
+	if (!kc->timer_create)
+		return -EOPNOTSUPP;
 
 	new_timer = alloc_posix_timer();
 	if (unlikely(!new_timer))

@@ -608,7 +598,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 		goto out;
 	}
 
-	error = CLOCK_DISPATCH(which_clock, timer_create, (new_timer));
+	error = kc->timer_create(new_timer);
 	if (error)
 		goto out;
 

@@ -618,7 +608,7 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 	spin_unlock_irq(&current->sighand->siglock);
 
 	return 0;
- 	/*
+	/*
 	 * In the case of the timer belonging to another task, after
 	 * the task is unlocked, the timer is owned by the other task
 	 * and may cease to exist at any time.  Don't use or modify

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -252,6 +252,7 @@ static __init int init_posix_timers(void
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
+		.timer_set	= common_timer_set,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,

@@ -259,6 +260,7 @@ static __init int init_posix_timers(void
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
+		.timer_set	= common_timer_set,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,

@@ -803,6 +805,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, 
 	int error = 0;
 	unsigned long flag;
 	struct itimerspec *rtn = old_setting ? &old_spec : NULL;
+	struct k_clock *kc;
 
 	if (!new_setting)
 		return -EINVAL;

@@ -818,8 +821,8 @@ retry:
 	if (!timr)
 		return -EINVAL;
 
-	error = CLOCK_DISPATCH(timr->it_clock, timer_set,
-			       (timr, flags, &new_spec, rtn));
+	kc = clockid_to_kclock(timr->it_clock);
+	error = kc->timer_set(timr, flags, &new_spec, rtn);
 
 	unlock_timer(timr, flag);
 	if (error == TIMER_RETRY) {

index 4f71382..a4dbfe7 100644
@@ -252,6 +252,7 @@ static __init int init_posix_timers(void)
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
+		.timer_set	= common_timer_set,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,

@@ -259,6 +260,7 @@ static __init int init_posix_timers(void)
 		.nsleep		= common_nsleep,
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
+		.timer_set	= common_timer_set,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,

@@ -814,6 +816,7 @@ SYSCALL_DEFINE4(timer_settime, timer_t, timer_id, int, flags,
 	int error = 0;
 	unsigned long flag;
 	struct itimerspec *rtn = old_setting ? &old_spec : NULL;
+	struct k_clock *kc;
 
 	if (!new_setting)
 		return -EINVAL;

@@ -829,8 +832,11 @@ retry:
 	if (!timr)
 		return -EINVAL;
 
-	error = CLOCK_DISPATCH(timr->it_clock, timer_set,
-			       (timr, flags, &new_spec, rtn));
+	kc = clockid_to_kclock(timr->it_clock);
+	if (WARN_ON_ONCE(!kc || !kc->timer_set))
+		error = -EINVAL;
+	else
+		error = kc->timer_set(timr, flags, &new_spec, rtn);
 
 	unlock_timer(timr, flag);
 	if (error == TIMER_RETRY) {

Index: linux-2.6-tip/kernel/posix-timers.c
===================================================================
@@ -253,6 +253,7 @@ static __init int init_posix_timers(void
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
 		.timer_set	= common_timer_set,
+		.timer_get	= common_timer_get,
 	};
 	struct k_clock clock_monotonic = {
 		.clock_getres	= hrtimer_get_res,

@@ -261,6 +262,7 @@ static __init int init_posix_timers(void
 		.nsleep_restart	= hrtimer_nanosleep_restart,
 		.timer_create	= common_timer_create,
 		.timer_set	= common_timer_set,
+		.timer_get	= common_timer_get,
 	};
 	struct k_clock clock_monotonic_raw = {
 		.clock_getres	= hrtimer_get_res,