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s390/irq: select HAVE_IRQ_EXIT_ON_IRQ_STACK

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[ Upstream commit 9ceed9988a8e6a1656ed2bdaa30501cf0f3dd925 ]

irq_exit() is always called on async stack. Therefore select
HAVE_IRQ_EXIT_ON_IRQ_STACK and get a tiny optimization in
invoke_softirq().

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Heiko Carstens 2020-12-10 22:30:09 +01:00 committed by Greg Kroah-Hartman
parent d8fe62cb91
commit d65f69deac
1 changed files with 1 additions and 0 deletions
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arch/s390/Kconfig
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@ -154,6 +154,7 @@ config S390
select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_GCC_PLUGINS
select HAVE_GENERIC_VDSO
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZ4