ftrace/x86: Adjust x86 regs.ip as like as x86-64

Adjust x86 regs.ip to ip + MCOUNT_INSN_SIZE as like as
on x86-64. This helps us to consolidate codes which use
regs->ip on both of x86/x86-64.

Link: http://lkml.kernel.org/r/20120905143100.10329.60109.stgit@localhost.localdomain

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 061ac17ee974..f438a44bf8f9 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1148,7 +1148,6 @@ ENTRY(ftrace_regs_caller)
          * ip location, and move flags into the return ip location.
          */
         pushl 4(%esp)   /* save return ip into ip slot */
-        subl $MCOUNT_INSN_SIZE, (%esp)  /* Adjust ip */
 
         pushl $0        /* Load 0 into orig_ax */
         pushl %gs
@@ -1169,6 +1168,7 @@ ENTRY(ftrace_regs_caller)
         movl $__KERNEL_CS,13*4(%esp)
 
         movl 12*4(%esp), %eax   /* Load ip (1st parameter) */
+        subl $MCOUNT_INSN_SIZE, %eax    /* Adjust ip */
         movl 0x4(%ebp), %edx    /* Load parent ip (2nd parameter) */
         leal function_trace_op, %ecx /* Save ftrace_pos in 3rd parameter */
         pushl %esp              /* Save pt_regs as 4th parameter */
@@ -1180,7 +1180,6 @@ GLOBAL(ftrace_regs_call)
         movl 14*4(%esp), %eax   /* Move flags back into cs */
         movl %eax, 13*4(%esp)   /* Needed to keep addl from modifying flags */
         movl 12*4(%esp), %eax   /* Get return ip from regs->ip */
-        addl $MCOUNT_INSN_SIZE, %eax
         movl %eax, 14*4(%esp)   /* Put return ip back for ret */
 
         popl %ebx