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x86/nmi: Mark 'ignore_nmis' as __read_mostly

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ignore_nmis is used in two distinct places:

 1. modified through {stop,restart}_nmi by alternative_instructions
 2. read by do_nmi to determine if default_do_nmi should be called or not

thus the access pattern conforms to __read_mostly and do_nmi() is a fastpath.

Signed-off-by: Kostenzer Felix <fkostenzer@live.at>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kostenzer Felix 2016-03-06 23:20:06 +01:00 committed by Ingo Molnar
parent e17dc65328
commit 8e2a7f5b9a
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kernel/nmi.c
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@ -30,6 +30,7 @@
#include <asm/nmi.h>
#include <asm/x86_init.h>
#include <asm/reboot.h>
#include <asm/cache.h>
#define CREATE_TRACE_POINTS
#include <trace/events/nmi.h>
@ -69,7 +70,7 @@ struct nmi_stats {
static DEFINE_PER_CPU(struct nmi_stats, nmi_stats);
static int ignore_nmis;
static int ignore_nmis __read_mostly;
int unknown_nmi_panic;
/*