udf: avoid unnecessary synchronous writes

Fix udf_clear_inode() to request asynchronous writeout in icache reclaim
path.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 466d2ee..3483274 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -119,7 +119,7 @@
 		udf_discard_prealloc(inode);
 		udf_truncate_tail_extent(inode);
 		unlock_kernel();
-		write_inode_now(inode, 1);
+		write_inode_now(inode, 0);
 	}
 	iinfo = UDF_I(inode);
 	kfree(iinfo->i_ext.i_data);