Author: kib
Date: Wed Mar 7 08:10:55 2012
New Revision: 232648
URL: http://svn.freebsd.org/changeset/base/232648
Log:
MFC r232305:
Allow shared locks for reads when lower filesystem accept shared locking.
Modified:
stable/9/sys/fs/nullfs/null_vfsops.c
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/fs/nullfs/null_vfsops.c
==============================================================================
--- stable/9/sys/fs/nullfs/null_vfsops.c Wed Mar 7 08:08:36 2012
(r232647)
+++ stable/9/sys/fs/nullfs/null_vfsops.c Wed Mar 7 08:10:55 2012
(r232648)
@@ -180,7 +180,8 @@ nullfs_mount(struct mount *mp)
MNT_IUNLOCK(mp);
}
MNT_ILOCK(mp);
- mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag & MNTK_MPSAFE;
+ mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag &
+ (MNTK_MPSAFE | MNTK_SHARED_WRITES);
MNT_IUNLOCK(mp);
mp->mnt_data = xmp;
vfs_getnewfsid(mp);
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