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| author | Alexander Lobakin <aleksander.lobakin@intel.com> | 2024-03-27 16:23:42 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-04-01 10:49:27 +0100 |
| commit | 7d8296b250f2eed73f1758607926d4d258dea5d4 (patch) | |
| tree | c04f8aeed4832a056ea8947c9109b396f94838e8 /tools/include/linux | |
| parent | 72cc1980a0ef3ccad0d539e7dace63d0d7d432a4 (diff) | |
| download | linux-7d8296b250f2eed73f1758607926d4d258dea5d4.tar.gz linux-7d8296b250f2eed73f1758607926d4d258dea5d4.tar.bz2 linux-7d8296b250f2eed73f1758607926d4d258dea5d4.zip | |
bitops: make BYTES_TO_BITS() treewide-available
Avoid open-coding that simple expression each time by moving
BYTES_TO_BITS() from the probes code to <linux/bitops.h> to export
it to the rest of the kernel.
Simplify the macro while at it. `BITS_PER_LONG / sizeof(long)` always
equals to %BITS_PER_BYTE, regardless of the target architecture.
Do the same for the tools ecosystem as well (incl. its version of
bitops.h). The previous implementation had its implicit type of long,
while the new one is int, so adjust the format literal accordingly in
the perf code.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Acked-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/include/linux')
| -rw-r--r-- | tools/include/linux/bitops.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/include/linux/bitops.h b/tools/include/linux/bitops.h index 7319f6ced108..272f15d0e434 100644 --- a/tools/include/linux/bitops.h +++ b/tools/include/linux/bitops.h @@ -20,6 +20,8 @@ #define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(u32)) #define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_TYPE(char)) +#define BYTES_TO_BITS(nb) ((nb) * BITS_PER_BYTE) + extern unsigned int __sw_hweight8(unsigned int w); extern unsigned int __sw_hweight16(unsigned int w); extern unsigned int __sw_hweight32(unsigned int w); |