ftrace: have function graph use mcount caller address
Impact: consistency change for function graph
This patch makes function graph record the mcount caller address
the same way the function tracer does.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 958af86..826682a 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1230,6 +1230,7 @@
pushl %edx
movl 0xc(%esp), %edx
lea 0x4(%ebp), %eax
+ subl $MCOUNT_INSN_SIZE, %edx
call prepare_ftrace_return
popl %edx
popl %ecx
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 2aa0526..9060ba6 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -173,6 +173,7 @@
leaq 8(%rbp), %rdi
movq 0x38(%rsp), %rsi
+ subq $MCOUNT_INSN_SIZE, %rsi
call prepare_ftrace_return