Instead of constantly checking each possibility of the maple state,
create a fast path that will skip over checking unlikely states.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
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.
--
2.40.1
