xfs: switch to NOFS allocation under i_lock in xfs_attr_rmtval_set

xfs_attr_rmtval_set is always called with i_lock held, and i_lock is taken
in reclaim context so all allocations under it must avoid recursions into
the filesystem.

Reported by the new reclaim context tracing in lockdep.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index db15feb906ff..bfb583791fe2 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -2141,8 +2141,8 @@ xfs_attr_rmtval_set(xfs_da_args_t *args)
                 dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
                 blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
 
-                bp = xfs_buf_get_flags(mp->m_ddev_targp, dblkno,
-                                                        blkcnt, XFS_BUF_LOCK);
+                bp = xfs_buf_get_flags(mp->m_ddev_targp, dblkno, blkcnt,
+                                       XFS_BUF_LOCK | XBF_DONT_BLOCK);
                 ASSERT(bp);
                 ASSERT(!XFS_BUF_GETERROR(bp));