git: kernel -- ffs: Do not dereference NULL inodes in ffs_sync_scan1.

[Venkatesh Srinivas <vsrinivas@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 609f61878d1378c3d04602cf1e581a6f57dfae47
Author: Venkatesh Srinivas <me@endeavour.zapto.org>
Date:   Thu Mar 29 23:33:08 2012 -0700

    kernel -- ffs: Do not dereference NULL inodes in ffs_sync_scan1.
    
    ffs_sync_scan1 is a fast callback from vmntvnodescan; it is not called
    with vnodes locked. It is possible for an ffs_reclaim to have reclaimed
    the vnode in question, NULL-ing out ip, without having removed the vnode
    from the per-mount list. If we see a NULL inode, return failure from the
    fast callback.

Summary of changes:
 sys/vfs/ufs/ffs_vfsops.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/609f61878d1378c3d04602cf1e581a6f57dfae47


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