six locks: Fix a lost wakeup

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There was a lost wakeup between a read unlock in percpu mode and a write
lock. The unlock path unlocks, then executes a barrier, then checks for
waiters; correspondingly, the lock side should set the wait bit and
execute a barrier, then attempt to take the lock.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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This commit is contained in:

Kent Overstreet 2022-10-15 00:34:38 -04:00

parent 5b254da573

commit e4b7254c75

1 changed files with 8 additions and 3 deletions

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fs/bcachefs/six.c

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