Messages in this thread Patch in this message | | | From | "Liam R. Howlett" <> | Subject | [PATCH 1/2] maple_tree: Add mas_active() to detect in-tree walks | Date | Thu, 21 Sep 2023 14:12:35 -0400 |
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Instead of constantly checking each possibility of the maple state, create a fast path that will skip over checking unlikely states.
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com> --- include/linux/maple_tree.h | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index e41c70ac7744..f66f5f78f8cf 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -511,6 +511,15 @@ static inline bool mas_is_paused(const struct ma_state *mas) return mas->node == MAS_PAUSE; } +/* Check if the mas is pointing to a node or not */ +static inline bool mas_is_active(struct ma_state *mas) +{ + if ((unsigned long)mas->node >= MAPLE_RESERVED_RANGE) + return true; + + return false; +} + /** * mas_reset() - Reset a Maple Tree operation state. * @mas: Maple Tree operation state. -- 2.39.2
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