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author | Matthew Wilcox <willy@infradead.org> | 2018-11-16 15:50:02 -0500 |
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committer | Matthew Wilcox <willy@infradead.org> | 2018-11-19 09:40:58 -0500 |
commit | 25bbe21bf427a81b8e3ccd480ea0e1d940256156 (patch) | |
tree | 7ff0a4b75ca42c59b35c3ee77a6fc7fd131fb3f2 | |
parent | 0e40de0338d005f73d46898a21544cd26f01b4ce (diff) |
dax: Avoid losing wakeup in dax_lock_mapping_entry
After calling get_unlocked_entry(), you have to call
put_unlocked_entry() to avoid subsequent waiters losing wakeups.
Fixes: c2a7d2a11552 ("filesystem-dax: Introduce dax_lock_mapping_entry()")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Wilcox <willy@infradead.org>
-rw-r--r-- | fs/dax.c | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -391,6 +391,7 @@ bool dax_lock_mapping_entry(struct page *page) rcu_read_unlock(); entry = get_unlocked_entry(&xas); xas_unlock_irq(&xas); + put_unlocked_entry(&xas, entry); rcu_read_lock(); continue; } |