diff options
| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-07-24 14:31:47 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:48 -0700 |
| commit | c1297987cc2ada57a7faea7985c2334548d110f9 (patch) | |
| tree | 299a5a01db1772a754349fa6f093cafdce538653 | |
| parent | 445a2ea0ef0e0e69812218b2c896a23443466625 (diff) | |
maple_tree: introduce __mas_set_range()
mas_set_range() resets the node to MAS_START, which will cause a re-walk
of the tree to the range. This is unnecessary when the maple state is
already at the correct location of the write. Add a function that only
sets the range to avoid unnecessary re-walking of the tree.
Link: https://lkml.kernel.org/r/20230724183157.3939892-6-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/maple_tree.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 949f911bf955..e10db656e31c 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -539,6 +539,22 @@ static inline void mas_reset(struct ma_state *mas) */ #define mas_for_each(__mas, __entry, __max) \ while (((__entry) = mas_find((__mas), (__max))) != NULL) +/** + * __mas_set_range() - Set up Maple Tree operation state to a sub-range of the + * current location. + * @mas: Maple Tree operation state. + * @start: New start of range in the Maple Tree. + * @last: New end of range in the Maple Tree. + * + * set the internal maple state values to a sub-range. + * Please use mas_set_range() if you do not know where you are in the tree. + */ +static inline void __mas_set_range(struct ma_state *mas, unsigned long start, + unsigned long last) +{ + mas->index = start; + mas->last = last; +} /** * mas_set_range() - Set up Maple Tree operation state for a different index. @@ -553,9 +569,8 @@ static inline void mas_reset(struct ma_state *mas) static inline void mas_set_range(struct ma_state *mas, unsigned long start, unsigned long last) { - mas->index = start; - mas->last = last; - mas->node = MAS_START; + __mas_set_range(mas, start, last); + mas->node = MAS_START; } /** |