[PATCH 5/5] ftrace: have function graph use mcount caller address

[Steven Rostedt]

From: Steven Rostedt <srostedt@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 arch/x86/kernel/entry_32.S |    1 +
 arch/x86/kernel/entry_64.S |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index f484e9a..3497321 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -1027,6 +1027,7 @@ ENTRY(ftrace_graph_caller)
 	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 c433d86..47aa5f0 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -172,6 +172,7 @@ ENTRY(ftrace_graph_caller)
 
 	leaq 8(%rbp), %rdi
 	movq 0x38(%rsp), %rsi
+	subq $MCOUNT_INSN_SIZE, %rsi
 
 	call	prepare_ftrace_return
 
-- 
1.5.6.5

-- 
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