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authorKostenzer Felix <fkostenzer@live.at>2016-03-06 23:20:06 +0100
committerIngo Molnar <mingo@kernel.org>2016-03-08 12:48:19 +0100
commit8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e (patch)
treeafe4787696a0b2594bc6cd6282e3983baf1ba24c /arch/x86/kernel/nmi.c
parentperf/x86/intel: Fix PEBS data source interpretation on Nehalem/Westmere (diff)
downloadlinux-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/kernel/nmi.c')
-rw-r--r--arch/x86/kernel/nmi.c3
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;
/*