Commit 1202700c authored by Liam R. Howlett's avatar Liam R. Howlett Committed by Andrew Morton
Browse files

maple_tree: fix handle of invalidated state in mas_wr_store_setup() 

If an invalidated maple state is encountered during write, reset the maple
state to MAS_START.  This will result in a re-walk of the tree to the
correct location for the write.

Link: https://lore.kernel.org/all/20230107020126.1627-1-sj@kernel.org/
Link: https://lkml.kernel.org/r/20230120162650.984577-6-Liam.Howlett@oracle.com


Signed-off-by: default avatarLiam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 5159d64b

lib/maple_tree.c

+3 −0
Original line number Diff line number Diff line
@@ -5609,6 +5609,9 @@ static inline void mte_destroy_walk(struct maple_enode *enode, 


static void mas_wr_store_setup(struct ma_wr_state *wr_mas)

{

	if (unlikely(mas_is_paused(wr_mas->mas)))

		mas_reset(wr_mas->mas);



	if (!mas_is_start(wr_mas->mas)) {

		if (mas_is_none(wr_mas->mas)) {

			mas_reset(wr_mas->mas);