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authorLinus Torvalds <torvalds@linux-foundation.org>2024-05-13 20:05:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2024-05-13 20:05:39 +0300
commit2e57d1d6062af11420bc329ca004ebe3f3f6f0ee (patch)
tree45d7c77f76bd77a2c6f71ac9dea2648b385f5cdd /arch/Kconfig
parentc0b9620bc3f0a0f914996cc6631522d41870a9e0 (diff)
parent5800e77d88c0cd98bc10460df148631afa7b5e4d (diff)
downloadlinux-2e57d1d6062af11420bc329ca004ebe3f3f6f0ee.tar.xz
Merge tag 'cmpxchg.2024.05.11a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull cmpxchg updates from Paul McKenney: "Provide one-byte and two-byte cmpxchg() support on sparc32, parisc, and csky This provides native one-byte and two-byte cmpxchg() support for sparc32 and parisc, courtesy of Al Viro. This support is provided by the same hashed-array-of-locks technique used for the other atomic operations provided for these two platforms. There is also emulated one-byte cmpxchg() support for csky using a new cmpxchg_emu_u8() function that uses a four-byte cmpxchg() to emulate the one-byte variant. Similar patches for emulation of one-byte cmpxchg() for arc, sh, and xtensa have not yet received maintainer acks, so they are slated for the v6.11 merge window" * tag 'cmpxchg.2024.05.11a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: csky: Emulate one-byte cmpxchg lib: Add one-byte emulation function parisc: add u16 support to cmpxchg() parisc: add missing export of __cmpxchg_u8() parisc: unify implementations of __cmpxchg_u{8,32,64} parisc: __cmpxchg_u32(): lift conversion into the callers sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to handle those sizes sparc32: unify __cmpxchg_u{32,64} sparc32: make the first argument of __cmpxchg_u64() volatile u64 * sparc32: make __cmpxchg_u32() return u32
Diffstat (limited to 'arch/Kconfig')
-rw-r--r--arch/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index a51addb1abb9..9f2f3060a6ab 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1617,4 +1617,7 @@ config CC_HAS_SANE_FUNCTION_ALIGNMENT
# strict alignment always, even with -falign-functions.
def_bool CC_HAS_MIN_FUNCTION_ALIGNMENT || CC_IS_CLANG
+config ARCH_NEED_CMPXCHG_1_EMU
+ bool
+
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