[PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE
From: Andy Lutomirski <luto@kernel.org>
Date: 2021-06-16 03:21:42
Also in:
linux-mm, lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2021-06-17 · Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE · Krzysztof Hałasa <khalasa@piap.pl>
On arm32, the only way to safely flush icache from usermode is to call cacheflush(2). This also handles any required pipeline flushes, so membarrier's SYNC_CORE feature is useless on arm. Remove it. Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King <linux@armlinux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/arm/Kconfig | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 24804f11302d..89a885fba724 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig@@ -10,7 +10,6 @@ config ARM select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_KEEPINITRD select ARCH_HAS_KCOV - select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PTE_SPECIAL if ARM_LPAE select ARCH_HAS_PHYS_TO_DMA
--
2.31.1
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