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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:35:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:31 +0000 |
| commit | 85c675d0d09a45a135bddd15d7b385f8758c32fb (patch) | |
| tree | 76267dbc9b9a130337be3640948fe397b04ac629 /arch/mips/include/asm/bitops.h | |
| parent | Adding upstream version 6.6.15. (diff) | |
| download | linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip | |
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/mips/include/asm/bitops.h')
| -rw-r--r-- | arch/mips/include/asm/bitops.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h index b4bf754f7d..89f73d1a4e 100644 --- a/arch/mips/include/asm/bitops.h +++ b/arch/mips/include/asm/bitops.h @@ -73,7 +73,8 @@ int __mips_test_and_clear_bit(unsigned long nr, volatile unsigned long *addr); int __mips_test_and_change_bit(unsigned long nr, volatile unsigned long *addr); - +bool __mips_xor_is_negative_byte(unsigned long mask, + volatile unsigned long *addr); /* * set_bit - Atomically set a bit in memory @@ -279,6 +280,28 @@ static inline int test_and_change_bit(unsigned long nr, return res; } +static inline bool xor_unlock_is_negative_byte(unsigned long mask, + volatile unsigned long *p) +{ + unsigned long orig; + bool res; + + smp_mb__before_atomic(); + + if (!kernel_uses_llsc) { + res = __mips_xor_is_negative_byte(mask, p); + } else { + orig = __test_bit_op(*p, "%0", + "xor\t%1, %0, %3", + "ir"(mask)); + res = (orig & BIT(7)) != 0; + } + + smp_llsc_mb(); + + return res; +} + #undef __bit_op #undef __test_bit_op |