From: Heiko Carstens <hca@linux.ibm.com>
Date: Thu, 10 Dec 2020 21:30:09 +0000 (+0100)
Subject: s390/irq: select HAVE_IRQ_EXIT_ON_IRQ_STACK
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=d65f69deac5cf916cc27762bccde8c8874421cae;p=linux-block.git

s390/irq: select HAVE_IRQ_EXIT_ON_IRQ_STACK

[ 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>
---

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 4a2a12be04c9..dc5c3e6fd200 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -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