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authorMark Rutland <mark.rutland@arm.com>2021-05-25 16:02:15 +0200
committerPeter Zijlstra <peterz@infradead.org>2021-05-26 13:20:51 +0200
commita5fb82d7e2695e667badeac202fb7d113a8ae9a9 (patch)
tree6669d352fc0663a44c6f2cee8015d8fadff8823d /arch/csky
parentlocking/atomic: arm: move to ARCH_ATOMIC (diff)
downloadlinux-a5fb82d7e2695e667badeac202fb7d113a8ae9a9.tar.xz
linux-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/Kconfig1
-rw-r--r--arch/csky/include/asm/cmpxchg.h8
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; \
})