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| author | Peng Zhang <zhangpeng.00@bytedance.com> | 2023-11-20 15:09:34 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-12 10:57:00 -0800 |
| commit | 3f05fcdebf2979569802e1ee94cf4c7d887546e2 (patch) | |
| tree | 34963ea9aa8f725a5a27ac31dfdca3773b96e8fd /lib/maple_tree.c | |
| parent | 2e783f0c1a0d9017209f2ed243960924ebb602cb (diff) | |
| download | linux-3f05fcdebf2979569802e1ee94cf4c7d887546e2.tar.gz linux-3f05fcdebf2979569802e1ee94cf4c7d887546e2.tar.bz2 linux-3f05fcdebf2979569802e1ee94cf4c7d887546e2.zip | |
maple_tree: avoid ascending when mas->min is also the parent's minimum
When the child node is the first child of its parent node, mas->min does
not need to be updated. This can reduce the number of ascending times
in some cases.
Link: https://lkml.kernel.org/r/20231120070937.35481-3-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/maple_tree.c')
| -rw-r--r-- | lib/maple_tree.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index df3ae393f12a..e26bc4473eb7 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -1088,14 +1088,16 @@ static int mas_ascend(struct ma_state *mas) return 0; } - if (!mas->min) + min = 0; + max = ULONG_MAX; + if (!mas->offset) { + min = mas->min; set_min = true; + } if (mas->max == ULONG_MAX) set_max = true; - min = 0; - max = ULONG_MAX; do { p_enode = a_enode; a_type = mas_parent_type(mas, p_enode); |