tracing: Use alignof__(struct {type b;}) instead of offsetof()

stable inclusion
from stable-v5.10.165
commit c6e3c12ff9fba32f1833b730a052f4b0a49a403d
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7T7G4

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c6e3c12ff9fba32f1833b730a052f4b0a49a403d

--------------------------------

commit 09794a5a 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@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>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>