[RFA][PATCH 2/5] ftrace/x86: One more missing sync after fixup of function modification failure

[Steven Rostedt]

[Request for Ack]

From: Petr Mladek <pmladek@xxxxxxx>

If a failure occurs while modifying ftrace function, it bails out and will
remove the tracepoints to be back to what the code originally was.

There is missing the final sync run across the CPUs after the fix up is done
and before the ftrace int3 handler flag is reset.

Link: http://lkml.kernel.org/r/1393258342-29978-2-git-send-email-pmladek@xxxxxxx

Fixes: 8a4d0a687a5 "ftrace: Use breakpoint method to update ftrace caller"
Cc: stable@xxxxxxxxxxxxxxx # 3.5+
Signed-off-by: Petr Mladek <pmladek@xxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 arch/x86/kernel/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 6b566c8..69885e2 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -660,8 +660,8 @@ ftrace_modify_code(unsigned long ip, unsigned const char *old_code,
 		ret = -EPERM;
 		goto out;
 	}
-	run_sync();
  out:
+	run_sync();
 	return ret;
 
  fail_update:
-- 
1.8.5.3


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