From 110ed28246a0063a5984d7f72ba5c97f154a51cf Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 2 Nov 2007 12:16:51 +0900
Subject: sh: Decouple 4k and soft/hardirq stacks.
While using separate IRQ stacks can cut down on stack consumption,
many users can also use 4k stacks directly without the additional
need of separate stacks for soft and hardirqs.
With this split, we support the same rationale for 4KSTACKS as
m68knommu, with the IRQSTACKS abstraction as per ppc64.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/kernel/irq.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
(limited to 'arch/sh/kernel')
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 4b49d03..348da19 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -69,7 +69,7 @@ unlock:
}
#endif
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
/*
* per-CPU IRQ handling contexts (thread information and stack)
*/
@@ -85,7 +85,7 @@ static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
union irq_ctx *curctx, *irqctx;
#endif
@@ -109,7 +109,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
irq = irq_demux(evt2irq(irq));
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
curctx = (union irq_ctx *)current_thread_info();
irqctx = hardirq_ctx[smp_processor_id()];
@@ -157,7 +157,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
return 1;
}
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
static char softirq_stack[NR_CPUS * THREAD_SIZE]
__attribute__((__section__(".bss.page_aligned")));
--
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