sbitmap: optimise sbitmap_deferred_clear()

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Because of spinlocks and atomics sbitmap_deferred_clear() have to reload
&sb->map[index] on each access even though the map address won't change.
Pass in sbitmap_word instead of {sb, index}, so it's cached in a
variable. It also improves code generation of
sbitmap_find_bit_in_index().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2020-11-22 15:35:45 +00:00 • committed by Jens Axboe

parent f6f371f7db

commit b78beea038

1 changed files with 12 additions and 12 deletions

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lib/sbitmap.c

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