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| author | Will Deacon <will.deacon@arm.com> | 2013-10-09 15:54:27 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-10-24 15:46:34 +0100 |
| commit | 5686b06cea34e31ec0a549d9b5ac00776e8e8d6d (patch) | |
| tree | 69f5fa9d9ccc89232bea8c1e1337a4217751ba3d /arch/arm64/Kconfig | |
| parent | 52ea2a560a9dba57fe5fd6b4726b1089751accf2 (diff) | |
| download | linux-5686b06cea34e31ec0a549d9b5ac00776e8e8d6d.tar.gz | |
arm64: lockref: add support for lockless lockrefs using cmpxchg
Our spinlocks are only 32-bit (2x16-bit tickets) and our cmpxchg can deal with 8-bytes (as one would hope!). This patch wires up the cmpxchg-based lockless lockref implementation for arm64. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c04454876bcb..9e8233b3f188 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1,6 +1,7 @@ config ARM64 def_bool y select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE + select ARCH_USE_CMPXCHG_LOCKREF select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_COMPAT_IPC_PARSE_VERSION select ARCH_WANT_FRAME_POINTERS |