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| author | Ingo Molnar <mingo@kernel.org> | 2016-07-27 12:35:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-27 12:35:35 +0200 |
| commit | df15929f8f5c69e987c31bf016eca4a38dba46f0 (patch) | |
| tree | cfb5fe5e8ebff4cabd70557a304f355546943cc9 /lib/atomic64.c | |
| parent | efaad554b4ffae1840a2759e09e21325ddbc8b05 (diff) | |
| parent | 37e13a1ebe32c4fbfbdb5413f42eb6e71d8b28a4 (diff) | |
Merge branch 'linus' into x86/microcode, to pick up merge window changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/atomic64.c')
| -rw-r--r-- | lib/atomic64.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/lib/atomic64.c b/lib/atomic64.c index 2886ebac6567..53c2d5edc826 100644 --- a/lib/atomic64.c +++ b/lib/atomic64.c @@ -96,17 +96,41 @@ long long atomic64_##op##_return(long long a, atomic64_t *v) \ } \ EXPORT_SYMBOL(atomic64_##op##_return); +#define ATOMIC64_FETCH_OP(op, c_op) \ +long long atomic64_fetch_##op(long long a, atomic64_t *v) \ +{ \ + unsigned long flags; \ + raw_spinlock_t *lock = lock_addr(v); \ + long long val; \ + \ + raw_spin_lock_irqsave(lock, flags); \ + val = v->counter; \ + v->counter c_op a; \ + raw_spin_unlock_irqrestore(lock, flags); \ + return val; \ +} \ +EXPORT_SYMBOL(atomic64_fetch_##op); + #define ATOMIC64_OPS(op, c_op) \ ATOMIC64_OP(op, c_op) \ - ATOMIC64_OP_RETURN(op, c_op) + ATOMIC64_OP_RETURN(op, c_op) \ + ATOMIC64_FETCH_OP(op, c_op) ATOMIC64_OPS(add, +=) ATOMIC64_OPS(sub, -=) -ATOMIC64_OP(and, &=) -ATOMIC64_OP(or, |=) -ATOMIC64_OP(xor, ^=) #undef ATOMIC64_OPS +#define ATOMIC64_OPS(op, c_op) \ + ATOMIC64_OP(op, c_op) \ + ATOMIC64_OP_RETURN(op, c_op) \ + ATOMIC64_FETCH_OP(op, c_op) + +ATOMIC64_OPS(and, &=) +ATOMIC64_OPS(or, |=) +ATOMIC64_OPS(xor, ^=) + +#undef ATOMIC64_OPS +#undef ATOMIC64_FETCH_OP #undef ATOMIC64_OP_RETURN #undef ATOMIC64_OP |