59 static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
149 static inline bool is_partial_io(struct bio_vec *bvec)  in is_partial_io()  argument
151 	return bvec->bv_len != PAGE_SIZE;  in is_partial_io()
154 static inline bool is_partial_io(struct bio_vec *bvec)  in is_partial_io()  argument
184 static void update_position(u32 *index, int *offset, struct bio_vec *bvec)  in update_position()  argument
186 	*index  += (*offset + bvec->bv_len) / PAGE_SIZE;  in update_position()
187 	*offset = (*offset + bvec->bv_len) % PAGE_SIZE;  in update_position()
595 static int read_from_bdev_async(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_async()  argument
606 	if (!bio_add_page(bio, bvec->bv_page, bvec->bv_len, bvec->bv_offset)) {  in read_from_bdev_async()
677 		struct bio_vec bvec;  in writeback_store()  local
679 		bvec.bv_page = page;  in writeback_store()
680 		bvec.bv_len = PAGE_SIZE;  in writeback_store()
681 		bvec.bv_offset = 0;  in writeback_store()
722 		if (zram_bvec_read(zram, &bvec, index, 0, NULL)) {  in writeback_store()
735 		bio_add_page(&bio, bvec.bv_page, bvec.bv_len,  in writeback_store()
736 				bvec.bv_offset);  in writeback_store()
801 	struct bio_vec bvec;  member
812 	read_from_bdev_async(zram, &zw->bvec, entry, bio);  in zram_sync_read()
820 static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_sync()  argument
825 	work.bvec = *bvec;  in read_from_bdev_sync()
838 static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_sync()  argument
846 static int read_from_bdev(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev()  argument
851 		return read_from_bdev_sync(zram, bvec, entry, parent);  in read_from_bdev()
853 		return read_from_bdev_async(zram, bvec, entry, parent);  in read_from_bdev()
857 static int read_from_bdev(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev()  argument
1247 		struct bio_vec bvec;  in __zram_bvec_read()  local
1251 		bvec.bv_page = page;  in __zram_bvec_read()
1252 		bvec.bv_len = PAGE_SIZE;  in __zram_bvec_read()
1253 		bvec.bv_offset = 0;  in __zram_bvec_read()
1254 		return read_from_bdev(zram, &bvec,  in __zram_bvec_read()
1299 static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,  in zram_bvec_read()  argument
1305 	page = bvec->bv_page;  in zram_bvec_read()
1306 	if (is_partial_io(bvec)) {  in zram_bvec_read()
1313 	ret = __zram_bvec_read(zram, page, index, bio, is_partial_io(bvec));  in zram_bvec_read()
1317 	if (is_partial_io(bvec)) {  in zram_bvec_read()
1318 		void *dst = kmap_atomic(bvec->bv_page);  in zram_bvec_read()
1321 		memcpy(dst + bvec->bv_offset, src + offset, bvec->bv_len);  in zram_bvec_read()
1326 	if (is_partial_io(bvec))  in zram_bvec_read()
1332 static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec,  in __zram_bvec_write()  argument
1341 	struct page *page = bvec->bv_page;  in __zram_bvec_write()
1449 static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,  in zram_bvec_write()  argument
1457 	vec = *bvec;  in zram_bvec_write()
1458 	if (is_partial_io(bvec)) {  in zram_bvec_write()
1472 		src = kmap_atomic(bvec->bv_page);  in zram_bvec_write()
1474 		memcpy(dst + offset, src + bvec->bv_offset, bvec->bv_len);  in zram_bvec_write()
1485 	if (is_partial_io(bvec))  in zram_bvec_write()
1533 static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,  in zram_bvec_rw()  argument
1540 		ret = zram_bvec_read(zram, bvec, index, offset, bio);  in zram_bvec_rw()
1541 		flush_dcache_page(bvec->bv_page);  in zram_bvec_rw()
1544 		ret = zram_bvec_write(zram, bvec, index, offset, bio);  in zram_bvec_rw()
1565 	struct bio_vec bvec;  in __zram_make_request()  local
1584 	bio_for_each_segment(bvec, bio, iter) {  in __zram_make_request()
1585 		struct bio_vec bv = bvec;  in __zram_make_request()
1586 		unsigned int unwritten = bvec.bv_len;  in __zram_make_request()