[PATCH] amd64: 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>

1 files changed, 2 insertions, 8 deletions

diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c
index 86248bc9303e..53205622351c 100644
--- a/arch/x86_64/kernel/ptrace.c
+++ b/arch/x86_64/kernel/ptrace.c
@@ -67,12 +67,6 @@ static inline unsigned long get_stack_long(struct task_struct *task, int offset)
         return (*((unsigned long *)stack));
 }
 
-static inline struct pt_regs *get_child_regs(struct task_struct *task)
-{
-        struct pt_regs *regs = (void *)task->thread.rsp0;
-        return regs - 1;
-}
-
 /*
  * this routine will put a word on the processes privileged stack. 
  * the offset is how far from the base addr as stored in the TSS.  
@@ -170,7 +164,7 @@ static int is_at_popf(struct task_struct *child, struct pt_regs *regs)
 
 static void set_singlestep(struct task_struct *child)
 {
-        struct pt_regs *regs = get_child_regs(child);
+        struct pt_regs *regs = task_pt_regs(child);
 
         /*
          * Always set TIF_SINGLESTEP - this guarantees that
@@ -208,7 +202,7 @@ static void clear_singlestep(struct task_struct *child)
 
         /* But touch TF only if it was set by us.. */
         if (child->ptrace & PT_DTRACE) {
-                struct pt_regs *regs = get_child_regs(child);
+                struct pt_regs *regs = task_pt_regs(child);
                 regs->eflags &= ~TRAP_FLAG;
                 child->ptrace &= ~PT_DTRACE;
         }