diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-03-02 08:05:45 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-02 08:05:45 +0100 |
| commit | 9d020d33fc1b2faa0eb35859df1381ca5dc94ffe (patch) | |
| tree | adcd4356b93b17b42c9e4ef95c3fea3afa52f3ee /arch/powerpc/include/asm/bitops.h | |
| parent | 6b0b7551428e4caae1e2c023a529465a9a9ae2d4 (diff) | |
| parent | 4977ab6e92e267afe9d8f78438c3db330ca8434c (diff) | |
Merge branch 'linus' into perf/urgent, to resolve conflict
Conflicts:
arch/powerpc/configs/85xx/kmp204x_defconfig
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/powerpc/include/asm/bitops.h')
| -rw-r--r-- | arch/powerpc/include/asm/bitops.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h index 59abc620f8e8..73eb794d6163 100644 --- a/arch/powerpc/include/asm/bitops.h +++ b/arch/powerpc/include/asm/bitops.h @@ -154,6 +154,34 @@ static __inline__ int test_and_change_bit(unsigned long nr, return test_and_change_bits(BIT_MASK(nr), addr + BIT_WORD(nr)) != 0; } +#ifdef CONFIG_PPC64 +static __inline__ unsigned long clear_bit_unlock_return_word(int nr, + volatile unsigned long *addr) +{ + unsigned long old, t; + unsigned long *p = (unsigned long *)addr + BIT_WORD(nr); + unsigned long mask = BIT_MASK(nr); + + __asm__ __volatile__ ( + PPC_RELEASE_BARRIER +"1:" PPC_LLARX(%0,0,%3,0) "\n" + "andc %1,%0,%2\n" + PPC405_ERR77(0,%3) + PPC_STLCX "%1,0,%3\n" + "bne- 1b\n" + : "=&r" (old), "=&r" (t) + : "r" (mask), "r" (p) + : "cc", "memory"); + + return old; +} + +/* This is a special function for mm/filemap.c */ +#define clear_bit_unlock_is_negative_byte(nr, addr) \ + (clear_bit_unlock_return_word(nr, addr) & BIT_MASK(PG_waiters)) + +#endif /* CONFIG_PPC64 */ + #include <asm-generic/bitops/non-atomic.h> static __inline__ void __clear_bit_unlock(int nr, volatile unsigned long *addr) |