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| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-01-20 11:26:06 -0500 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-02-09 16:51:31 -0800 |
| commit | 1202700c3f8cc5f7e4646c3cf05ee6f7c8bc6ccf (patch) | |
| tree | fde514193e0056129a3477c222fc76bbe64471a7 /lib/maple_tree.c | |
| parent | 5159d64b335401fa83f18c27e2267f1eafc41bd3 (diff) | |
| download | lwn-1202700c3f8cc5f7e4646c3cf05ee6f7c8bc6ccf.tar.gz lwn-1202700c3f8cc5f7e4646c3cf05ee6f7c8bc6ccf.zip | |
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: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/maple_tree.c')
| -rw-r--r-- | lib/maple_tree.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 5804c5997598..7c786bd5e575 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -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); |