From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Laight <David.Laight@ACULAB.COM>
Subject: [for-next][PATCH 5/5] tracing: Use alignof__(struct {type b;}) instead of offsetof()
Date: Wed, 03 Aug 2022 09:55:13 -0400 [thread overview]
Message-ID: <20220803135538.312181330@goodmis.org> (raw)
In-Reply-To: 20220803135508.240797292@goodmis.org
From: "Steven Rostedt (Google)" <rostedt@goodmis.org>
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@AcuMS.aculab.com/
Link: https://lkml.kernel.org/r/20220802154412.513c50e3@gandalf.local.home
Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
include/trace/stages/stage4_event_fields.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/trace/stages/stage4_event_fields.h b/include/trace/stages/stage4_event_fields.h
index 80d34f396555..a8fb25f39a99 100644
--- a/include/trace/stages/stage4_event_fields.h
+++ b/include/trace/stages/stage4_event_fields.h
@@ -2,7 +2,7 @@
/* Stage 4 definitions for creating trace events */
-#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) { \
--
2.35.1
prev parent reply other threads:[~2022-08-03 13:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 13:55 [for-next][PATCH 0/5] tracing: Final clean ups for 5.20 (or 6.0) Steven Rostedt
2022-08-03 13:55 ` [for-next][PATCH 1/5] tracing: Use free_trace_buffer() in allocate_trace_buffers() Steven Rostedt
2022-08-03 13:55 ` [for-next][PATCH 2/5] tracepoints: It is CONFIG_TRACEPOINTS not CONFIG_TRACEPOINT Steven Rostedt
2022-08-03 13:55 ` [for-next][PATCH 3/5] scripts/tracing: Fix typo the the in comment Steven Rostedt
2022-08-03 13:55 ` [for-next][PATCH 4/5] tracing/eprobe: Show syntax error logs in error_log file Steven Rostedt
2022-08-03 13:55 ` Steven Rostedt [this message]
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