diff options
Diffstat (limited to 'arch/mips/lib/bitops.c')
| -rw-r--r-- | arch/mips/lib/bitops.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/mips/lib/bitops.c b/arch/mips/lib/bitops.c index 116d0bd8b2..00aee98e9d 100644 --- a/arch/mips/lib/bitops.c +++ b/arch/mips/lib/bitops.c @@ -146,3 +146,17 @@ int __mips_test_and_change_bit(unsigned long nr, volatile unsigned long *addr) return res; } EXPORT_SYMBOL(__mips_test_and_change_bit); + +bool __mips_xor_is_negative_byte(unsigned long mask, + volatile unsigned long *addr) +{ + unsigned long flags; + unsigned long data; + + raw_local_irq_save(flags); + data = *addr; + *addr = data ^ mask; + raw_local_irq_restore(flags); + + return (data & BIT(7)) != 0; +} |