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[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()

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IRQ_PER_CPU is not used by all architectures.  This patch introduces the
macros ARCH_HAS_IRQ_PER_CPU and CHECK_IRQ_PER_CPU() to avoid the generation
of dead code in __do_IRQ().

ARCH_HAS_IRQ_PER_CPU is defined by architectures using IRQ_PER_CPU in their
include/asm_ARCH/irq.h file.

Through grepping the tree I found the following architectures currently use
IRQ_PER_CPU:

        cris, ia64, ppc, ppc64 and parisc.

Signed-off-by: Karsten Wiese <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Karsten Wiese 2005-09-06 15:17:25 -07:00 • committed by Linus Torvalds
commit f26fdd5992
7 changed files with 32 additions and 2 deletions
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2
kernel/irq/handle.c
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@ -111,7 +111,7 @@ fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs)
unsigned int status;
kstat_this_cpu.irqs[irq]++;
if (desc->status & IRQ_PER_CPU) {
if (CHECK_IRQ_PER_CPU(desc->status)) {
irqreturn_t action_ret;
/*