[patch] irq: fix arch/i386/kernel/irq.c gcc warning

[Ingo Molnar <mingo@elte.hu>]

* Andrew Morton <akpm@osdl.org> wrote:

> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17/2.6.17-mm3/

> Changes since 2.6.17-mm2:
> 
>  origin.patch

upstream grew a new compiler warning in i386 irq.c. Patch below fixes 
it. No change in resulting irq.o code.

	Ingo

-------------
Subject: irq: fix arch/i386/kernel/irq.c gcc warning
From: Ingo Molnar <mingo@elte.hu>

add parantheses. (code was fine because & has a higher precedence than |,
but it's a dangerous construct in general and gcc also emits a warning)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/i386/kernel/irq.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux/arch/i386/kernel/irq.c
===================================================================
--- linux.orig/arch/i386/kernel/irq.c
+++ linux/arch/i386/kernel/irq.c
@@ -104,8 +104,8 @@ fastcall unsigned int do_IRQ(struct pt_r
 		 * softirq checks work in the hardirq context.
 		 */
 		irqctx->tinfo.preempt_count =
-			irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK |
-			curctx->tinfo.preempt_count & SOFTIRQ_MASK;
+			(irqctx->tinfo.preempt_count & ~SOFTIRQ_MASK) |
+			(curctx->tinfo.preempt_count & SOFTIRQ_MASK);
 
 		asm volatile(
 			"       xchgl   %%ebx,%%esp      \n"