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| author | Kostenzer Felix <fkostenzer@live.at> | 2016-03-06 23:20:06 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-03-08 12:48:19 +0100 |
| commit | 8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e (patch) | |
| tree | afe4787696a0b2594bc6cd6282e3983baf1ba24c /arch/x86 | |
| parent | perf/x86/intel: Fix PEBS data source interpretation on Nehalem/Westmere (diff) | |
| download | linux-8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e.tar.xz linux-8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e.zip | |
x86/nmi: Mark 'ignore_nmis' as __read_mostly
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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/nmi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c index 8a2cdd736fa4..04b132a767f1 100644 --- a/arch/x86/kernel/nmi.c +++ b/arch/x86/kernel/nmi.c @@ -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; /* |