x86: Clarify/fix no-op barriers for text_poke_bp()

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So I was looking at text_poke_bp() today and I couldn't make sense of
the barriers there.

How's for something like so?

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: masami.hiramatsu.pt@hitachi.com
Link: http://lkml.kernel.org/r/20170731102154.f57cvkjtnbmtctk6@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

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Peter Zijlstra 2017-07-31 12:21:54 +02:00 • committed by Ingo Molnar

parent e137a4d8f4

commit 01651324ed

1 changed files with 16 additions and 6 deletions

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arch/x86/kernel/alternative.c

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