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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-22 01:29:01 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-05-22 01:29:01 +0300 |
| commit | 4865a27c66fda6a32511ec5492f4bbec437f512d (patch) | |
| tree | dae4d82641bb45bc97735799dd7f0aac88b34778 /include/linux/wordpart.h | |
| parent | b6394d6f715919c053c1450ef0d7c5e517b53764 (diff) | |
| parent | 5671dca241b9a2f4ecf88d8e992041cfb580e0a5 (diff) | |
| download | linux-4865a27c66fda6a32511ec5492f4bbec437f512d.tar.xz | |
Merge tag 'bitmap-for-6.10v2' of https://github.com/norov/linux
Pull bitmap updates from Yury Norov:
- topology_span_sane() optimization from Kyle Meyer
- fns() rework from Kuan-Wei Chiu (used in cpumask_local_spread() and
other places)
- headers cleanup from Andy
- add a MAINTAINERS record for bitops API
* tag 'bitmap-for-6.10v2' of https://github.com/norov/linux:
usercopy: Don't use "proxy" headers
bitops: Move aligned_byte_mask() to wordpart.h
MAINTAINERS: add BITOPS API record
bitmap: relax find_nth_bit() limitation on return value
lib: make test_bitops compilable into the kernel image
bitops: Optimize fns() for improved performance
lib/test_bitops: Add benchmark test for fns()
Compiler Attributes: Add __always_used macro
sched/topology: Optimize topology_span_sane()
cpumask: Add for_each_cpu_from()
Diffstat (limited to 'include/linux/wordpart.h')
| -rw-r--r-- | include/linux/wordpart.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h index f6f8f83b15b0..4ca1ba66d2f0 100644 --- a/include/linux/wordpart.h +++ b/include/linux/wordpart.h @@ -39,4 +39,11 @@ */ #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) +/* Set bits in the first 'n' bytes when loaded from memory */ +#ifdef __LITTLE_ENDIAN +# define aligned_byte_mask(n) ((1UL << 8*(n))-1) +#else +# define aligned_byte_mask(n) (~0xffUL << (BITS_PER_LONG - 8 - 8*(n))) +#endif + #endif // _LINUX_WORDPART_H |