This is a note to let you know that I've just added the patch titled
tracing: Use alignof__(struct {type b;}) instead of offsetof()
to the 5.10-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:
tracing-use-alignof__-struct-type-b-instead-of-offsetof.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cbaf7397ab38a82c6a2a1c79c0f8c5ada44954f4 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
Date: Tue, 2 Aug 2022 15:44:12 -0400
Subject: tracing: Use alignof__(struct {type b;}) instead of offsetof()
From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
commit 09794a5a6c348f629b35fc1687071a1622ef4265 upstream.
Simplify:
#define ALIGN_STRUCTFIELD(type) ((int)(offsetof(struct {char a; type b;}, b)))
with
#define ALIGN_STRUCTFIELD(type) __alignof__(struct {type b;})
Which works just the same.
Link: https://lore.kernel.org/all/a7d202457150472588df0bd3b7334b3f@xxxxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/20220802154412.513c50e3@xxxxxxxxxxxxxxxxxx
Suggested-by: David Laight <David.Laight@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/trace/trace_events.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/trace/trace_events.h
+++ b/include/trace/trace_events.h
@@ -400,7 +400,7 @@ static struct trace_event_functions trac
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
-#define ALIGN_STRUCTFIELD(type) ((int)(offsetof(struct {char a; type b;}, b)))
+#define ALIGN_STRUCTFIELD(type) ((int)(__alignof__(struct {type b;})))
#undef __field_ext
#define __field_ext(_type, _item, _filter_type) { \
Patches currently in stable-queue which might be from rostedt@xxxxxxxxxxx are
queue-5.10/tracing-use-alignof__-struct-type-b-instead-of-offsetof.patch
