Commit 8c836f17 authored by Wei Yang's avatar Wei Yang Committed by Andrew Morton
Browse files

maple_tree: not necessary to check index/last again 

Before calling mas_new_root(), the range has been checked.

Link: https://lkml.kernel.org/r/20241031231627.14316-4-richard.weiyang@gmail.com


Signed-off-by: default avatarWei Yang <richard.weiyang@gmail.com>
Reviewed-by: default avatarLiam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@Oracle.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent cefbcf20

lib/maple_tree.c

+3 −1
Original line number Diff line number Diff line
@@ -3670,7 +3670,9 @@ static inline void mas_new_root(struct ma_state *mas, void *entry) 
	void __rcu **slots;

	unsigned long *pivots;



	if (!entry && !mas->index && mas->last == ULONG_MAX) {

	WARN_ON_ONCE(mas->index || mas->last != ULONG_MAX);



	if (!entry) {

		mas->depth = 0;

		mas_set_height(mas);

		rcu_assign_pointer(mas->tree->ma_root, entry);