x86: Merge show_regs()

Using kernel_stack_pointer() allows 32-bit and 64-bit versions to
be merged.  This is more correct for 64-bit, since the old %rsp is
always saved on the stack.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1263397555-27695-1-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

3 files changed, 7 insertions, 12 deletions

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 98c2cdeb599e..cf1e04b2ad65 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -92,6 +92,13 @@ void exit_thread(void)
         }
 }
 
+void show_regs(struct pt_regs *regs)
+{
+        show_registers(regs);
+        show_trace(NULL, regs, (unsigned long *)kernel_stack_pointer(regs),
+                   regs->bp);
+}
+
 void show_regs_common(void)
 {
         const char *board, *product;
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 9c517b5858f0..fe6a34e42bde 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -174,12 +174,6 @@ void __show_regs(struct pt_regs *regs, int all)
                         d6, d7);
 }
 
-void show_regs(struct pt_regs *regs)
-{
-        show_registers(regs);
-        show_trace(NULL, regs, &regs->sp, regs->bp);
-}
-
 void release_thread(struct task_struct *dead_task)
 {
         BUG_ON(dead_task->mm);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 52fbd0c60198..418f860880a2 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -211,12 +211,6 @@ void __show_regs(struct pt_regs *regs, int all)
         printk(KERN_INFO "DR3: %016lx DR6: %016lx DR7: %016lx\n", d3, d6, d7);
 }
 
-void show_regs(struct pt_regs *regs)
-{
-        show_registers(regs);
-        show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
-}
-
 void release_thread(struct task_struct *dead_task)
 {
         if (dead_task->mm) {