linux-kernel - [PATCH 5.12 287/292] s390/irq: remove HAVE_IRQ_EXIT_ON_IRQ

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Message-Id: <20210719144952.355189462@linuxfoundation.org>
Date:   Mon, 19 Jul 2021 16:55:49 +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, Sven Schnelle <svens@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 287/292] s390/irq: remove HAVE_IRQ_EXIT_ON_IRQ_STACK

From: Sven Schnelle <svens@...ux.ibm.com>

[ Upstream commit 0aa4ff7688632a86bdb133fa106f2ccd514b91a7 ]

This is no longer true since we switched to generic entry. The code
switches to the IRQ stack before calling do_IRQ, but switches back
to the kernel stack before calling irq_exit().

Fixes: 56e62a737028 ("s390: convert to generic entry")
Signed-off-by: Sven Schnelle <svens@...ux.ibm.com>
Reviewed-by: Heiko Carstens <hca@...ux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/s390/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 4fcd460f496e..0cf31cb872e5 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -161,7 +161,6 @@ config S390
 	select HAVE_GCC_PLUGINS
 	select HAVE_GENERIC_VDSO
 	select HAVE_IOREMAP_PROT if PCI
-	select HAVE_IRQ_EXIT_ON_IRQ_STACK
 	select HAVE_KERNEL_BZIP2
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_LZ4
-- 
2.30.2