From 22722051fb6bcbb95c895e68dad10d34a9db7e4d Mon Sep 17 00:00:00 2001
From: Andreas Mohr <andi@rhlx01.fht-esslingen.de>
Date: Fri, 23 Jun 2006 02:05:30 -0700
Subject: [PATCH] [PATCH] x86/powerpc make hardirq_ctx and softirq_ctx
 __read_mostly

The hardirq_ctx and softirq_ctx variables are written to on init only,

Signed-off-by: Andreas Mohr <andi@lisas.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 arch/i386/kernel/irq.c    | 4 ++--
 arch/powerpc/kernel/irq.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
index f3a9c78c4a24..248e922ee13a 100644
--- a/arch/i386/kernel/irq.c
+++ b/arch/i386/kernel/irq.c
@@ -42,8 +42,8 @@ union irq_ctx {
 	u32                     stack[THREAD_SIZE/sizeof(u32)];
 };
 
-static union irq_ctx *hardirq_ctx[NR_CPUS];
-static union irq_ctx *softirq_ctx[NR_CPUS];
+static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
+static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
 #endif
 
 /*
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index bfcec4cc70a7..40d4c14fde8f 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -380,8 +380,8 @@ unsigned int real_irq_to_virt_slowpath(unsigned int real_irq)
 #endif /* CONFIG_PPC64 */
 
 #ifdef CONFIG_IRQSTACKS
-struct thread_info *softirq_ctx[NR_CPUS];
-struct thread_info *hardirq_ctx[NR_CPUS];
+struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
+struct thread_info *hardirq_ctx[NR_CPUS] __read_mostly;
 
 void irq_ctx_init(void)
 {
-- 
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