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| author | Mark Rutland <mark.rutland@arm.com> | 2021-05-25 15:02:15 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-26 13:20:51 +0200 |
| commit | a5fb82d7e2695e667badeac202fb7d113a8ae9a9 (patch) | |
| tree | 6669d352fc0663a44c6f2cee8015d8fadff8823d /arch/csky | |
| parent | fc63a6e08a8c97a3dc3a6f2e1946b949b9a6c2d3 (diff) | |
| download | lwn-a5fb82d7e2695e667badeac202fb7d113a8ae9a9.tar.gz lwn-a5fb82d7e2695e667badeac202fb7d113a8ae9a9.zip | |
locking/atomic: csky: move to ARCH_ATOMIC
We'd like all architectures to convert to ARCH_ATOMIC, as once all
architectures are converted it will be possible to make significant
cleanups to the atomics headers, and this will make it much easier to
generically enable atomic functionality (e.g. debug logic in the
instrumented wrappers).
As a step towards that, this patch migrates csky to ARCH_ATOMIC. The
arch code provides arch_{atomic,atomic64,xchg,cmpxchg}*(), and common
code wraps these with optional instrumentation to provide the regular
functions.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Guo Ren <guoren@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-17-mark.rutland@arm.com
Diffstat (limited to 'arch/csky')
| -rw-r--r-- | arch/csky/Kconfig | 1 | ||||
| -rw-r--r-- | arch/csky/include/asm/cmpxchg.h | 8 |
2 files changed, 5 insertions, 4 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 8de5b987edb9..3521f14bcd96 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -2,6 +2,7 @@ config CSKY def_bool y select ARCH_32BIT_OFF_T + select ARCH_ATOMIC select ARCH_HAS_DMA_PREP_COHERENT select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_SYNC_DMA_FOR_CPU diff --git a/arch/csky/include/asm/cmpxchg.h b/arch/csky/include/asm/cmpxchg.h index dabc8e46ce7b..d1bef11f8dc9 100644 --- a/arch/csky/include/asm/cmpxchg.h +++ b/arch/csky/include/asm/cmpxchg.h @@ -31,7 +31,7 @@ extern void __bad_xchg(void); __ret; \ }) -#define xchg_relaxed(ptr, x) \ +#define arch_xchg_relaxed(ptr, x) \ (__xchg_relaxed((x), (ptr), sizeof(*(ptr)))) #define __cmpxchg_relaxed(ptr, old, new, size) \ @@ -61,14 +61,14 @@ extern void __bad_xchg(void); __ret; \ }) -#define cmpxchg_relaxed(ptr, o, n) \ +#define arch_cmpxchg_relaxed(ptr, o, n) \ (__cmpxchg_relaxed((ptr), (o), (n), sizeof(*(ptr)))) -#define cmpxchg(ptr, o, n) \ +#define arch_cmpxchg(ptr, o, n) \ ({ \ __typeof__(*(ptr)) __ret; \ __smp_release_fence(); \ - __ret = cmpxchg_relaxed(ptr, o, n); \ + __ret = arch_cmpxchg_relaxed(ptr, o, n); \ __smp_acquire_fence(); \ __ret; \ }) |