tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 <fujita.tomonori@gmail.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://patch.msgid.link/20260106034034.60074-1-boqun.feng@gmail.com

Boqun Feng cf4c3bc1 2bb8c41e

+1
+1
arch/x86/um/Kconfig
··· 9 9 config UML_X86 10 10 def_bool y 11 11 select ARCH_USE_QUEUED_RWLOCKS 12 + select ARCH_SUPPORTS_ATOMIC_RMW 12 13 select ARCH_USE_QUEUED_SPINLOCKS 13 14 select DCACHE_WORD_ACCESS 14 15 select HAVE_EFFICIENT_UNALIGNED_ACCESS