From cf4c3bc1445152c1949a4b5fef56d07579fadb1e Mon Sep 17 00:00:00 2001 From: Boqun Feng Date: Tue, 6 Jan 2026 11:40:34 +0800 Subject: [PATCH] arch: um/x86: Select ARCH_SUPPORTS_ATOMIC_RMW for UML_X86 x86 atomic instructions are used for um on UML_X86, therefore atomics on UML_X86 support native atomic RmW as x86 does, hence select ARCH_SUPPORTS_ATOMIC_RMW. Reviewed-by: FUJITA Tomonori Acked-by: Richard Weinberger Signed-off-by: Boqun Feng Link: https://patch.msgid.link/20260106034034.60074-1-boqun.feng@gmail.com --- arch/x86/um/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index bdd7c8e39b011..44b12e45f9a05 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -9,6 +9,7 @@ endmenu config UML_X86 def_bool y select ARCH_USE_QUEUED_RWLOCKS + select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_USE_QUEUED_SPINLOCKS select DCACHE_WORD_ACCESS select HAVE_EFFICIENT_UNALIGNED_ACCESS -- 2.47.3