Author: ambrisko
Date: Wed Apr 18 19:15:59 2012
New Revision: 234438
URL: http://svn.freebsd.org/changeset/base/234438
Log:
MFC r230778
When detaching an AIO or LIO requests grab the lock and tell knlist_remove
that we have the lock now. This cleans up a locking panic ASSERT when
knlist_empty is called without a lock when INVARIANTS etc. are turned.
Modified:
stable/9/sys/kern/vfs_aio.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/kern/vfs_aio.c
==============================================================================
--- stable/9/sys/kern/vfs_aio.c Wed Apr 18 19:11:21 2012 (r234437)
+++ stable/9/sys/kern/vfs_aio.c Wed Apr 18 19:15:59 2012 (r234438)
@@ -2535,10 +2535,13 @@ filt_aioattach(struct knote *kn)
static void
filt_aiodetach(struct knote *kn)
{
- struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
+ struct knlist *knl;
- if (!knlist_empty(&aiocbe->klist))
- knlist_remove(&aiocbe->klist, kn, 0);
+ knl = &kn->kn_ptr.p_aio->klist;
+ knl->kl_lock(knl->kl_lockarg);
+ if (!knlist_empty(knl))
+ knlist_remove(knl, kn, 1);
+ knl->kl_unlock(knl->kl_lockarg);
}
/* kqueue filter function */
@@ -2580,10 +2583,13 @@ filt_lioattach(struct knote *kn)
static void
filt_liodetach(struct knote *kn)
{
- struct aioliojob * lj = kn->kn_ptr.p_lio;
+ struct knlist *knl;
- if (!knlist_empty(&lj->klist))
- knlist_remove(&lj->klist, kn, 0);
+ knl = &kn->kn_ptr.p_lio->klist;
+ knl->kl_lock(knl->kl_lockarg);
+ if (!knlist_empty(knl))
+ knlist_remove(knl, kn, 1);
+ knl->kl_unlock(knl->kl_lockarg);
}
/* kqueue filter function */
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