Remove last_syscall

Index: linux-2.6/arch/powerpc/kernel/asm-offsets.c
===================================================================
@@ -77,7 +77,6 @@
 	DEFINE(KSP_VSID, offsetof(struct thread_struct, ksp_vsid));
 #else /* CONFIG_PPC64 */
 	DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
-	DEFINE(LAST_SYSCALL, offsetof(struct thread_struct, last_syscall));
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
 	DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));
 	DEFINE(PT_PTRACED, PT_PTRACED);

Index: linux-2.6/arch/powerpc/kernel/process.c
===================================================================
@@ -567,7 +567,6 @@
 	kregs->nip = *((unsigned long *)ret_from_fork);
 #else
 	kregs->nip = (unsigned long)ret_from_fork;
-	p->thread.last_syscall = -1;
 #endif
 
 	return 0;

Index: linux-2.6/include/asm-powerpc/processor.h
===================================================================
@@ -133,7 +133,6 @@
 	mm_segment_t	fs;		/* for get_fs() validation */
 #ifdef CONFIG_PPC32
 	void		*pgdir;		/* root of page-table tree */
-	signed long	last_syscall;
 #endif
 #if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
 	unsigned long	dbcr0;		/* debug control register values */

Index: linux-2.6/arch/ppc/kernel/asm-offsets.c
===================================================================
@@ -40,7 +40,6 @@
 	DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(KSP, offsetof(struct thread_struct, ksp));
 	DEFINE(PGDIR, offsetof(struct thread_struct, pgdir));
-	DEFINE(LAST_SYSCALL, offsetof(struct thread_struct, last_syscall));
 	DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
 	DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
 	DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));