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| author | Will Deacon <will.deacon@arm.com> | 2015-07-27 16:21:15 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-07-27 16:21:15 +0300 |
| commit | fc9eb93cd4c5d819e9a68a7906d78ce37f42d8cd (patch) | |
| tree | 821a265ae21cbc1b350afa05da413e89b89f034e /arch/sparc/lib/atomic32.c | |
| parent | 772d68355e2f65f71e0402e39aabfdea56f55083 (diff) | |
| parent | 41b9e9fcc1c44b84a785115058ce9c703e3fca6e (diff) | |
| download | linux-fc9eb93cd4c5d819e9a68a7906d78ce37f42d8cd.tar.xz | |
Merge branch 'locking/arch-atomic' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into aarch64/for-next/core
Merge in PeterZ's logical atomic ops so that we can implement them in
our subsequent LSE atomics.
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 71cd65ab200c..b9d63c0a7aab 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -27,22 +27,38 @@ static DEFINE_SPINLOCK(dummy); #endif /* SMP */ -#define ATOMIC_OP(op, cop) \ +#define ATOMIC_OP_RETURN(op, c_op) \ int atomic_##op##_return(int i, atomic_t *v) \ { \ int ret; \ unsigned long flags; \ spin_lock_irqsave(ATOMIC_HASH(v), flags); \ \ - ret = (v->counter cop i); \ + ret = (v->counter c_op i); \ \ spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \ return ret; \ } \ EXPORT_SYMBOL(atomic_##op##_return); -ATOMIC_OP(add, +=) +#define ATOMIC_OP(op, c_op) \ +void atomic_##op(int i, atomic_t *v) \ +{ \ + unsigned long flags; \ + spin_lock_irqsave(ATOMIC_HASH(v), flags); \ + \ + v->counter c_op i; \ + \ + spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \ +} \ +EXPORT_SYMBOL(atomic_##op); + +ATOMIC_OP_RETURN(add, +=) +ATOMIC_OP(and, &=) +ATOMIC_OP(or, |=) +ATOMIC_OP(xor, ^=) +#undef ATOMIC_OP_RETURN #undef ATOMIC_OP int atomic_xchg(atomic_t *v, int new) |