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| author | Mark Rutland <mark.rutland@arm.com> | 2021-05-25 15:02:04 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-26 13:20:49 +0200 |
| commit | f0c7bf1b77c65c9a273207d228df27009f09ec0b (patch) | |
| tree | 9c8fac2cd31990d2bd2ca33d62c6d9fcd862ec69 /arch/openrisc | |
| parent | b68622a86c8f30423c0a09204b1db2b74a06b5f0 (diff) | |
| download | linux-f0c7bf1b77c65c9a273207d228df27009f09ec0b.tar.bz2 | |
locking/atomic: openrisc: avoid asm-generic/atomic.h
OpenRISC is the only architecture which uses asm-generic/atomic.h and
also provides its own implementation of some functions, requiring
ifdeferry in the asm-generic header. As OpenRISC provides the vast
majority of functions itself, it would be simpler overall if it also
provided the few functions it cribs from asm-generic.
This patch decouples OpenRISC from asm-generic/atomic.h. Subsequent
patches will simplify the asm-generic implementation and remove the now
unnecessary ifdeferry.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Stafford Horne <shorne@gmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210525140232.53872-6-mark.rutland@arm.com
Diffstat (limited to 'arch/openrisc')
| -rw-r--r-- | arch/openrisc/include/asm/atomic.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/openrisc/include/asm/atomic.h b/arch/openrisc/include/asm/atomic.h index b589fac39b92..cb86970d3859 100644 --- a/arch/openrisc/include/asm/atomic.h +++ b/arch/openrisc/include/asm/atomic.h @@ -121,6 +121,12 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) } #define atomic_fetch_add_unless atomic_fetch_add_unless -#include <asm-generic/atomic.h> +#define atomic_read(v) READ_ONCE((v)->counter) +#define atomic_set(v,i) WRITE_ONCE((v)->counter, (i)) + +#include <asm/cmpxchg.h> + +#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) +#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) #endif /* __ASM_OPENRISC_ATOMIC_H */ |