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[S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED

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Set __ARCH_IRQ_EXIT_IRQS_DISABLED in order to optimize irq_exit() a
bit, since we call __do_softirq() instead of do_softirq().
This saves several needless checks, pointless interrupt disabling
and an extra branch.
If do_softirq() gets called from process context we still switch to
the async stack.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2012-03-11 11:59:30 -04:00 committed by Martin Schwidefsky
parent e3c652b533
commit 2215011dd9
1 changed files with 1 additions and 0 deletions
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1
arch/s390/include/asm/hardirq.h
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@ -18,6 +18,7 @@
#define __ARCH_IRQ_STAT
#define __ARCH_HAS_DO_SOFTIRQ
#define __ARCH_IRQ_EXIT_IRQS_DISABLED
#define HARDIRQ_BITS 8