Implement eytzinger0_find_ge() directly instead of implementing it in terms of eytzinger0_find_le() and adjusting the result.
Signed-off-by: Andreas Gruenbacher <[email protected]> --- fs/bcachefs/eytzinger.h | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/fs/bcachefs/eytzinger.h b/fs/bcachefs/eytzinger.h index a5a1abae5b13..6a363b12bd21 100644 --- a/fs/bcachefs/eytzinger.h +++ b/fs/bcachefs/eytzinger.h @@ -277,15 +277,17 @@ static inline int eytzinger0_find_gt(void *base, size_t nr, size_t size, return n - 1; } +/* return smallest node >= @search, or -1 if not found */ static inline int eytzinger0_find_ge(void *base, size_t nr, size_t size, cmp_func_t cmp, const void *search) { - ssize_t idx = eytzinger0_find_le(base, nr, size, cmp, search); - - if (idx < nr && !cmp(base + idx * size, search)) - return idx; + void *base1 = base - size; + unsigned n = 1; - return eytzinger0_next(idx, nr); + while (n <= nr) + n = eytzinger1_child(n, cmp(base1 + n * size, search) < 0); + n >>= __ffs(n + 1) + 1; + return n - 1; } #define eytzinger0_find(base, nr, size, _cmp, search) \ -- 2.48.1
