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From: Heiko Carstens <hca@linux.ibm.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
	Sven Schnelle <svens@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH] s390: Select ARCH_MEMORY_ORDER_TSO
Date: Wed, 14 Oct 2026 13:50:06 +0200	[thread overview]
Message-ID: <20261014115006.537790-1-hca@linux.ibm.com> (raw)

s390 is a Total Store Order (TSO) architecture. Therefore select
ARCH_MEMORY_ORDER_TSO which was introduced with [1]. As of now this has
only a small effect on futex_robust_unlock(), but that might change in
the future.

[1] commit 6149fc36c09b ("uaccess: Provide unsafe_atomic_store_release_user()")

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 4b51bc6e8948..ebdf9c8049af 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -145,6 +145,7 @@ config S390
 	select ARCH_INLINE_WRITE_UNLOCK_BH
 	select ARCH_INLINE_WRITE_UNLOCK_IRQ
 	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+	select ARCH_MEMORY_ORDER_TSO
 	select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
 	select ARCH_STACKWALK
 	select ARCH_SUPPORTS_ATOMIC_RMW
-- 
2.53.0


             reply	other threads:[~2026-10-14 11:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-14 11:50 Heiko Carstens [this message]
2026-10-14 11:52 ` [PATCH] s390: Select ARCH_MEMORY_ORDER_TSO sashiko-bot
2026-10-14 12:20 ` Ilya Leoshkevich

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