x86: fix ptrace.o compile error

x86: fix ptrace.o compile error

Fix compiling Linux 2.6.32.59 with gcc 4.7.1 (Debian 7 testing). Mainline has instead removed the "asmregparm" in ptrace.c (in fact, everywhere), but this alternative seemed too invasive.

CC arch/x86/kernel/ptrace.o
arch/x86/kernel/ptrace.c:1472:17: error: conflicting types for 'syscall_trace_enter' In file included from /usr/src/linux-2.6.32/arch/x86/include/asm/vm86.h:130:0,

                 from /usr/src/linux-2.6.32/arch/x86/include/asm/processor.h:10,
                 from /usr/src/linux-2.6.32/arch/x86/include/asm/thread_info.h:22,
                 from include/linux/thread_info.h:56,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:56,
                 from include/linux/sched.h:56,
                 from arch/x86/kernel/ptrace.c:11:
/usr/src/linux-2.6.32/arch/x86/include/asm/ptrace.h:145:13: note: previous declaration of 'syscall_trace_enter' was here
arch/x86/kernel/ptrace.c:1517:17: error: conflicting types for 'syscall_trace_leave'
In file included from /usr/src/linux-2.6.32/arch/x86/include/asm/vm86.h:130:0,
                 from /usr/src/linux-2.6.32/arch/x86/include/asm/processor.h:10,
                 from /usr/src/linux-2.6.32/arch/x86/include/asm/thread_info.h:22,
                 from include/linux/thread_info.h:56,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:50,
                 from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:56,
                 from include/linux/sched.h:56,
                 from arch/x86/kernel/ptrace.c:11:

/usr/src/linux-2.6.32/arch/x86/include/asm/ptrace.h:146:13: note: previous declaration of 'syscall_trace_leave' was here make[2]: *** [arch/x86/kernel/ptrace.o] Error 1
make[1]: *** [arch/x86/kernel] Error 2
make: *** [arch/x86] Error 2

---

@@ -130,6 +130,7 @@
 #ifdef __KERNEL__
 
 #include <linux/init.h>
+#include <linux/linkage.h>
 
 struct cpuinfo_x86;
 struct task_struct;

@@ -142,8 +143,8 @@
 			 int error_code, int si_code);
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 
-extern long syscall_trace_enter(struct pt_regs *);
-extern void syscall_trace_leave(struct pt_regs *);
+extern asmregparm long syscall_trace_enter(struct pt_regs *);
+extern asmregparm void syscall_trace_leave(struct pt_regs *);
 
 static inline unsigned long regs_return_value(struct pt_regs *regs)
 {

_