This is a note to let you know that I've just added the patch titled
ftrace: Mark get_lock_parent_ip() __always_inline
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ftrace-mark-get_lock_parent_ip-__always_inline.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ea65b41807a26495ff2a73dd8b1bab2751940887 Mon Sep 17 00:00:00 2001
From: John Keeping <john@xxxxxxxxxxxx>
Date: Mon, 27 Mar 2023 18:36:46 +0100
Subject: ftrace: Mark get_lock_parent_ip() __always_inline
From: John Keeping <john@xxxxxxxxxxxx>
commit ea65b41807a26495ff2a73dd8b1bab2751940887 upstream.
If the compiler decides not to inline this function then preemption
tracing will always show an IP inside the preemption disabling path and
never the function actually calling preempt_{enable,disable}.
Link: https://lore.kernel.org/linux-trace-kernel/20230327173647.1690849-1-john@xxxxxxxxxxxx
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: f904f58263e1d ("sched/debug: Fix preempt_disable_ip recording for preempt_disable()")
Signed-off-by: John Keeping <john@xxxxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/ftrace.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -689,7 +689,7 @@ static inline void __ftrace_enabled_rest
#define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5))
#define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6))
-static inline unsigned long get_lock_parent_ip(void)
+static __always_inline unsigned long get_lock_parent_ip(void)
{
unsigned long addr = CALLER_ADDR0;
Patches currently in stable-queue which might be from john@xxxxxxxxxxxx are
queue-4.19/ftrace-mark-get_lock_parent_ip-__always_inline.patch
