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H A Dstage4_event_fields.h09794a5a Tue Aug 02 14:44:12 CDT 2022 Steven Rostedt (Google) <rostedt@goodmis.org> tracing: Use alignof__(struct {type b;}) instead of offsetof()

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>