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| author | Peter Zijlstra <peterz@infradead.org> | 2014-03-23 18:19:25 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-08-14 12:48:06 +0200 |
| commit | 7179e30ef66a5bae91592ae7fbacf3df6c627dd6 (patch) | |
| tree | 33a2cee5aeeb041cfa6a83be33b21a2453bfc291 /arch/cris | |
| parent | d325209b6000dcd13404ee946d2292e15a56718c (diff) | |
| download | op-kernel-dev-7179e30ef66a5bae91592ae7fbacf3df6c627dd6.zip op-kernel-dev-7179e30ef66a5bae91592ae7fbacf3df6c627dd6.tar.gz | |
locking,arch,cris: Fold atomic_ops
Many of the atomic op implementations are the same except for one
instruction; fold the lot into a few CPP macros and reduce LoC.
This also prepares for easy addition of new ops.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: linux-cris-kernel@axis.com
Link: http://lkml.kernel.org/r/20140508135852.104572724@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/cris')
| -rw-r--r-- | arch/cris/include/asm/atomic.h | 57 |
1 files changed, 25 insertions, 32 deletions
diff --git a/arch/cris/include/asm/atomic.h b/arch/cris/include/asm/atomic.h index aa429ba..0033f9d 100644 --- a/arch/cris/include/asm/atomic.h +++ b/arch/cris/include/asm/atomic.h @@ -22,43 +22,36 @@ /* These should be written in asm but we do it in C for now. */ -static inline void atomic_add(int i, volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - v->counter += i; - cris_atomic_restore(v, flags); +#define ATOMIC_OP(op, c_op) \ +static inline void atomic_##op(int i, volatile atomic_t *v) \ +{ \ + unsigned long flags; \ + cris_atomic_save(v, flags); \ + v->counter c_op i; \ + cris_atomic_restore(v, flags); \ +} \ + +#define ATOMIC_OP_RETURN(op, c_op) \ +static inline int atomic_##op##_return(int i, volatile atomic_t *v) \ +{ \ + unsigned long flags; \ + int retval; \ + cris_atomic_save(v, flags); \ + retval = (v->counter c_op i); \ + cris_atomic_restore(v, flags); \ + return retval; \ } -static inline void atomic_sub(int i, volatile atomic_t *v) -{ - unsigned long flags; - cris_atomic_save(v, flags); - v->counter -= i; - cris_atomic_restore(v, flags); -} +#define ATOMIC_OPS(op, c_op) ATOMIC_OP(op, c_op) ATOMIC_OP_RETURN(op, c_op) -static inline int atomic_add_return(int i, volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = (v->counter += i); - cris_atomic_restore(v, flags); - return retval; -} +ATOMIC_OPS(add, +=) +ATOMIC_OPS(sub, -=) -#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) +#undef ATOMIC_OPS +#undef ATOMIC_OP_RETURN +#undef ATOMIC_OP -static inline int atomic_sub_return(int i, volatile atomic_t *v) -{ - unsigned long flags; - int retval; - cris_atomic_save(v, flags); - retval = (v->counter -= i); - cris_atomic_restore(v, flags); - return retval; -} +#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) static inline int atomic_sub_and_test(int i, volatile atomic_t *v) { |
