if ((pb->pb_flags & (PBF_DELWRI|_PBF_DELWRI_Q)) == PBF_DELWRI) { atomic_inc(&pb->pb_hold); pb->pb_flags |= PBF_ASYNC; pagebuf_delwri_queue(pb, 0); }  
pagebuf_unlock(				/* unlock buffer		*/	xfs_buf_t		*pb)	/* buffer to unlock		*/{	PB_CLEAR_OWNER(pb);	up(&pb->pb_sema);	PB_TRACE(pb, "unlock", 0);}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/2f926587512869ebf6bc820bd5f030e127aae774/xfs_buf.c/clean/fs/xfs/linux-2.6/xfs_buf.c