46 	struct buffer_head *bh;  in gfs2_page_add_databufs()  local
49 	for (bh = head, start = 0; bh != head || !start;  in gfs2_page_add_databufs()
50 	     bh = bh->b_this_page, start = end) {  in gfs2_page_add_databufs()
55 			set_buffer_uptodate(bh);  in gfs2_page_add_databufs()
56 		gfs2_trans_add_data(ip->i_gl, bh);  in gfs2_page_add_databufs()
964 static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh)  in gfs2_discard()  argument
968 	lock_buffer(bh);  in gfs2_discard()
970 	clear_buffer_dirty(bh);  in gfs2_discard()
971 	bd = bh->b_private;  in gfs2_discard()
973 		if (!list_empty(&bd->bd_list) && !buffer_pinned(bh))  in gfs2_discard()
976 			gfs2_remove_from_journal(bh, current->journal_info, 0);  in gfs2_discard()
978 	bh->b_bdev = NULL;  in gfs2_discard()
979 	clear_buffer_mapped(bh);  in gfs2_discard()
980 	clear_buffer_req(bh);  in gfs2_discard()
981 	clear_buffer_new(bh);  in gfs2_discard()
983 	unlock_buffer(bh);  in gfs2_discard()
992 	struct buffer_head *bh, *head;  in gfs2_invalidatepage()  local
1001 	bh = head = page_buffers(page);  in gfs2_invalidatepage()
1003 		if (pos + bh->b_size > stop)  in gfs2_invalidatepage()
1007 			gfs2_discard(sdp, bh);  in gfs2_invalidatepage()
1008 		pos += bh->b_size;  in gfs2_invalidatepage()
1009 		bh = bh->b_this_page;  in gfs2_invalidatepage()
1010 	} while (bh != head);  in gfs2_invalidatepage()
1120 	struct buffer_head *bh, *head;  in gfs2_releasepage()  local
1128 	head = bh = page_buffers(page);  in gfs2_releasepage()
1130 		if (atomic_read(&bh->b_count))  in gfs2_releasepage()
1132 		bd = bh->b_private;  in gfs2_releasepage()
1135 		if (buffer_pinned(bh) || buffer_dirty(bh))  in gfs2_releasepage()
1137 		bh = bh->b_this_page;  in gfs2_releasepage()
1138 	} while(bh != head);  in gfs2_releasepage()
1141 	head = bh = page_buffers(page);  in gfs2_releasepage()
1143 		bd = bh->b_private;  in gfs2_releasepage()
1145 			gfs2_assert_warn(sdp, bd->bd_bh == bh);  in gfs2_releasepage()
1149 			bh->b_private = NULL;  in gfs2_releasepage()
1153 		bh = bh->b_this_page;  in gfs2_releasepage()
1154 	} while (bh != head);  in gfs2_releasepage()
1160 	WARN_ON(buffer_dirty(bh));  in gfs2_releasepage()
1161 	WARN_ON(buffer_pinned(bh));  in gfs2_releasepage()