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()
968 static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh)  in gfs2_discard()  argument
972 	lock_buffer(bh);  in gfs2_discard()
974 	clear_buffer_dirty(bh);  in gfs2_discard()
975 	bd = bh->b_private;  in gfs2_discard()
977 		if (!list_empty(&bd->bd_list) && !buffer_pinned(bh))  in gfs2_discard()
980 			gfs2_remove_from_journal(bh, current->journal_info, 0);  in gfs2_discard()
982 	bh->b_bdev = NULL;  in gfs2_discard()
983 	clear_buffer_mapped(bh);  in gfs2_discard()
984 	clear_buffer_req(bh);  in gfs2_discard()
985 	clear_buffer_new(bh);  in gfs2_discard()
987 	unlock_buffer(bh);  in gfs2_discard()
996 	struct buffer_head *bh, *head;  in gfs2_invalidatepage()  local
1005 	bh = head = page_buffers(page);  in gfs2_invalidatepage()
1007 		if (pos + bh->b_size > stop)  in gfs2_invalidatepage()
1011 			gfs2_discard(sdp, bh);  in gfs2_invalidatepage()
1012 		pos += bh->b_size;  in gfs2_invalidatepage()
1013 		bh = bh->b_this_page;  in gfs2_invalidatepage()
1014 	} while (bh != head);  in gfs2_invalidatepage()
1124 	struct buffer_head *bh, *head;  in gfs2_releasepage()  local
1132 	head = bh = page_buffers(page);  in gfs2_releasepage()
1134 		if (atomic_read(&bh->b_count))  in gfs2_releasepage()
1136 		bd = bh->b_private;  in gfs2_releasepage()
1139 		if (buffer_pinned(bh) || buffer_dirty(bh))  in gfs2_releasepage()
1141 		bh = bh->b_this_page;  in gfs2_releasepage()
1142 	} while(bh != head);  in gfs2_releasepage()
1145 	head = bh = page_buffers(page);  in gfs2_releasepage()
1147 		bd = bh->b_private;  in gfs2_releasepage()
1149 			gfs2_assert_warn(sdp, bd->bd_bh == bh);  in gfs2_releasepage()
1153 			bh->b_private = NULL;  in gfs2_releasepage()
1157 		bh = bh->b_this_page;  in gfs2_releasepage()
1158 	} while (bh != head);  in gfs2_releasepage()
1164 	WARN_ON(buffer_dirty(bh));  in gfs2_releasepage()
1165 	WARN_ON(buffer_pinned(bh));  in gfs2_releasepage()