[PATCH] sparc64: task_pt_regs()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/sparc64/kernel/ptrace.c

@@ -296,7 +296,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 	case PTRACE_GETREGS: {
 		struct pt_regs32 __user *pregs =
 			(struct pt_regs32 __user *) addr;
-		struct pt_regs *cregs = child->thread_info->kregs;
+		struct pt_regs *cregs = task_pt_regs(child);
 		int rval;
 
 		if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) ||
@@ -320,7 +320,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 
 	case PTRACE_GETREGS64: {
 		struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
-		struct pt_regs *cregs = child->thread_info->kregs;
+		struct pt_regs *cregs = task_pt_regs(child);
 		unsigned long tpc = cregs->tpc;
 		int rval;
 
@@ -348,7 +348,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 	case PTRACE_SETREGS: {
 		struct pt_regs32 __user *pregs =
 			(struct pt_regs32 __user *) addr;
-		struct pt_regs *cregs = child->thread_info->kregs;
+		struct pt_regs *cregs = task_pt_regs(child);
 		unsigned int psr, pc, npc, y;
 		int i;
 
@@ -381,7 +381,7 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 
 	case PTRACE_SETREGS64: {
 		struct pt_regs __user *pregs = (struct pt_regs __user *) addr;
-		struct pt_regs *cregs = child->thread_info->kregs;
+		struct pt_regs *cregs = task_pt_regs(child);
 		unsigned long tstate, tpc, tnpc, y;
 		int i;
 
@@ -562,8 +562,8 @@ asmlinkage void do_ptrace(struct pt_regs *regs)
 #ifdef DEBUG_PTRACE
 		printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm,
 			child->pid, child->exit_code,
-			child->thread_info->kregs->tpc,
-			child->thread_info->kregs->tnpc);
+			task_pt_regs(child)->tpc,
+			task_pt_regs(child)->tnpc);
 		       
 #endif
 		wake_up_process(child);

include/asm-sparc64/elf.h

@@ -119,7 +119,7 @@ typedef struct {
 #endif
 
 #define ELF_CORE_COPY_TASK_REGS(__tsk, __elf_regs)	\
-	({ ELF_CORE_COPY_REGS((*(__elf_regs)), (__tsk)->thread_info->kregs); 1; })
+	({ ELF_CORE_COPY_REGS((*(__elf_regs)), task_pt_regs(__tsk)); 1; })
 
 /*
  * This is used to ensure we don't load something for the wrong architecture.

include/asm-sparc64/processor.h

@@ -186,8 +186,9 @@ extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
 
 extern unsigned long get_wchan(struct task_struct *task);
 
-#define KSTK_EIP(tsk)  ((tsk)->thread_info->kregs->tpc)
-#define KSTK_ESP(tsk)  ((tsk)->thread_info->kregs->u_regs[UREG_FP])
+#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
+#define KSTK_EIP(tsk)  (task_pt_regs(tsk)->tpc)
+#define KSTK_ESP(tsk)  (task_pt_regs(tsk)->u_regs[UREG_FP])
 
 #define cpu_relax()	barrier()