Commit-ID: 8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e
Gitweb: http://git.kernel.org/tip/8e2a7f5b9a8c49f1f4e1dc8972198510f43c0b2e
Author: Kostenzer Felix <fkostenzer@xxxxxxx>
AuthorDate: Sun, 6 Mar 2016 23:20:06 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 8 Mar 2016 12:48:19 +0100
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@xxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/kernel/nmi.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 8a2cdd7..04b132a 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;
/*
--
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