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| author | Dawei Li <set_pte_at@outlook.com> | 2022-10-30 08:20:08 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-10-31 16:26:27 +0300 |
| commit | adff215830fcf3ef74f2f0d4dd5a47a6927d450b (patch) | |
| tree | 1e00cfc3a9df9f40146a5b34dfa492a097437223 /block/genhd.c | |
| parent | 82c229476b8f6afd7e09bc4dc77d89dc19ff7688 (diff) | |
| download | linux-adff215830fcf3ef74f2f0d4dd5a47a6927d450b.tar.xz | |
block: simplify blksize_bits() implementation
Convert current looping-based implementation into bit operation,
which can bring improvement for:
1) bitops is more efficient for its arch-level optimization.
2) Given that blksize_bits() is inline, _if_ @size is compile-time
constant, it's possible that order_base_2() _may_ make output
compile-time evaluated, depending on code context and compiler behavior.
Signed-off-by: Dawei Li <set_pte_at@outlook.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/TYCP286MB23238842958D7C083D6B67CECA349@TYCP286MB2323.JPNP286.PROD.OUTLOOK.COM
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
0 files changed, 0 insertions, 0 deletions