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gfs2: check context in gfs2_glock_put

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Add a might_sleep call into gfs2_glock_put which can sleep in DLM when
the last reference is released.  This will show problems earlier, and
not only when the last reference is put.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Alexander Aring 2021-10-13 10:02:00 -04:00 committed by Andreas Gruenbacher
parent 7427f3bb49
commit 660a6126f8
1 changed files with 3 additions and 0 deletions
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3
fs/gfs2/glock.c
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@ -301,6 +301,9 @@ void gfs2_glock_queue_put(struct gfs2_glock *gl)
void gfs2_glock_put(struct gfs2_glock *gl)
{
/* last put could call sleepable dlm api */
might_sleep();
if (lockref_put_or_lock(&gl->gl_lockref))
return;