669 	struct st_buffer *STbuffer;  in write_behind_check()  local
674 	STbuffer = STp->buffer;  in write_behind_check()
675 	if (!STbuffer->writing)  in write_behind_check()
686 	SRpnt = STbuffer->last_SRpnt;  in write_behind_check()
687 	STbuffer->last_SRpnt = NULL;  in write_behind_check()
693 	STbuffer->buffer_bytes -= STbuffer->writing;  in write_behind_check()
699 			STps->drv_block += STbuffer->writing / STp->block_size;  in write_behind_check()
702 	cmdstatp = &STbuffer->cmdstat;  in write_behind_check()
703 	if (STbuffer->syscall_result) {  in write_behind_check()
717 	STbuffer->writing = 0;  in write_behind_check()
722 				STbuffer->cmdstat.midlevel_result, retval);) /* end DEB */  in write_behind_check()
3898 static int enlarge_buffer(struct st_buffer * STbuffer, int new_size)  in enlarge_buffer()  argument
3903 	if (new_size <= STbuffer->buffer_size)  in enlarge_buffer()
3906 	if (STbuffer->buffer_size <= PAGE_SIZE)  in enlarge_buffer()
3907 		normalize_buffer(STbuffer);  /* Avoid extra segment */  in enlarge_buffer()
3909 	max_segs = STbuffer->use_sg;  in enlarge_buffer()
3913 	if (STbuffer->cleared)  in enlarge_buffer()
3916 	if (STbuffer->frp_segs) {  in enlarge_buffer()
3917 		order = STbuffer->reserved_page_order;  in enlarge_buffer()
3925 		STbuffer->reserved_page_order = order;  in enlarge_buffer()
3930 		normalize_buffer(STbuffer);  in enlarge_buffer()
3931 		return enlarge_buffer(STbuffer, new_size);  in enlarge_buffer()
3934 	for (segs = STbuffer->frp_segs, got = STbuffer->buffer_size;  in enlarge_buffer()
3940 			DEB(STbuffer->buffer_size = got);  in enlarge_buffer()
3941 			normalize_buffer(STbuffer);  in enlarge_buffer()
3945 		STbuffer->frp_segs += 1;  in enlarge_buffer()
3947 		STbuffer->buffer_size = got;  in enlarge_buffer()
3948 		STbuffer->reserved_pages[segs] = page;  in enlarge_buffer()
3951 	STbuffer->b_data = page_address(STbuffer->reserved_pages[0]);  in enlarge_buffer()
3970 static void normalize_buffer(struct st_buffer * STbuffer)  in normalize_buffer()  argument
3972 	int i, order = STbuffer->reserved_page_order;  in normalize_buffer()
3974 	for (i = 0; i < STbuffer->frp_segs; i++) {  in normalize_buffer()
3975 		__free_pages(STbuffer->reserved_pages[i], order);  in normalize_buffer()
3976 		STbuffer->buffer_size -= (PAGE_SIZE << order);  in normalize_buffer()
3978 	STbuffer->frp_segs = 0;  in normalize_buffer()
3979 	STbuffer->sg_segs = 0;  in normalize_buffer()
3980 	STbuffer->reserved_page_order = 0;  in normalize_buffer()
3981 	STbuffer->map_data.offset = 0;  in normalize_buffer()