x86: implement atomic text_poke() via fixmap

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Use fixmaps instead of vmap/vunmap in text_poke() for avoiding
page allocation and delayed unmapping.

At the result of above change, text_poke() becomes atomic and can be called
from stop_machine() etc.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
LKML-Reference: <49B14352.2040705@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

Masami Hiramatsu 2009-03-06 10:37:54 -05:00 • committed by Ingo Molnar

parent 3945dab45a

commit 78ff7fae04

2 changed files with 17 additions and 9 deletions

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2

arch/x86/include/asm/fixmap.h

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24

arch/x86/kernel/alternative.c

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