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Message-Id: <20210712060945.973018175@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:10:56 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Heiko Carstens <hca@...ux.ibm.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 496/593] s390/irq: select HAVE_IRQ_EXIT_ON_IRQ_STACK
From: Heiko Carstens <hca@...ux.ibm.com>
[ 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@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/s390/Kconfig | 1 +
1 file changed, 1 insertion(+)
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
--
2.30.2
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