57 static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,
147 static inline bool is_partial_io(struct bio_vec *bvec)  in is_partial_io()  argument
149 	return bvec->bv_len != PAGE_SIZE;  in is_partial_io()
152 static inline bool is_partial_io(struct bio_vec *bvec)  in is_partial_io()  argument
182 static void update_position(u32 *index, int *offset, struct bio_vec *bvec)  in update_position()  argument
184 	*index  += (*offset + bvec->bv_len) / PAGE_SIZE;  in update_position()
185 	*offset = (*offset + bvec->bv_len) % PAGE_SIZE;  in update_position()
605 static int read_from_bdev_async(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_async()  argument
616 	if (!bio_add_page(bio, bvec->bv_page, bvec->bv_len, bvec->bv_offset)) {  in read_from_bdev_async()
686 		struct bio_vec bvec;  in writeback_store()  local
688 		bvec.bv_page = page;  in writeback_store()
689 		bvec.bv_len = PAGE_SIZE;  in writeback_store()
690 		bvec.bv_offset = 0;  in writeback_store()
731 		if (zram_bvec_read(zram, &bvec, index, 0, NULL)) {  in writeback_store()
743 		bio_add_page(&bio, bvec.bv_page, bvec.bv_len,  in writeback_store()
744 				bvec.bv_offset);  in writeback_store()
809 	struct bio_vec bvec;  member
820 	read_from_bdev_async(zram, &zw->bvec, entry, bio);  in zram_sync_read()
828 static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_sync()  argument
833 	work.bvec = *bvec;  in read_from_bdev_sync()
846 static int read_from_bdev_sync(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev_sync()  argument
854 static int read_from_bdev(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev()  argument
859 		return read_from_bdev_sync(zram, bvec, entry, parent);  in read_from_bdev()
861 		return read_from_bdev_async(zram, bvec, entry, parent);  in read_from_bdev()
865 static int read_from_bdev(struct zram *zram, struct bio_vec *bvec,  in read_from_bdev()  argument
1256 		struct bio_vec bvec;  in __zram_bvec_read()  local
1263 		bvec.bv_page = page;  in __zram_bvec_read()
1264 		bvec.bv_len = PAGE_SIZE;  in __zram_bvec_read()
1265 		bvec.bv_offset = 0;  in __zram_bvec_read()
1266 		return read_from_bdev(zram, &bvec,  in __zram_bvec_read()
1311 static int zram_bvec_read(struct zram *zram, struct bio_vec *bvec,  in zram_bvec_read()  argument
1317 	page = bvec->bv_page;  in zram_bvec_read()
1318 	if (is_partial_io(bvec)) {  in zram_bvec_read()
1325 	ret = __zram_bvec_read(zram, page, index, bio, is_partial_io(bvec));  in zram_bvec_read()
1329 	if (is_partial_io(bvec)) {  in zram_bvec_read()
1332 		memcpy_to_bvec(bvec, src + offset);  in zram_bvec_read()
1336 	if (is_partial_io(bvec))  in zram_bvec_read()
1342 static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec,  in __zram_bvec_write()  argument
1351 	struct page *page = bvec->bv_page;  in __zram_bvec_write()
1469 static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,  in zram_bvec_write()  argument
1476 	vec = *bvec;  in zram_bvec_write()
1477 	if (is_partial_io(bvec)) {  in zram_bvec_write()
1492 		memcpy_from_bvec(dst + offset, bvec);  in zram_bvec_write()
1502 	if (is_partial_io(bvec))  in zram_bvec_write()
1550 static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,  in zram_bvec_rw()  argument
1557 		ret = zram_bvec_read(zram, bvec, index, offset, bio);  in zram_bvec_rw()
1558 		flush_dcache_page(bvec->bv_page);  in zram_bvec_rw()
1561 		ret = zram_bvec_write(zram, bvec, index, offset, bio);  in zram_bvec_rw()
1582 	struct bio_vec bvec;  in __zram_make_request()  local
1601 	bio_for_each_segment(bvec, bio, iter) {  in __zram_make_request()
1602 		struct bio_vec bv = bvec;  in __zram_make_request()
1603 		unsigned int unwritten = bvec.bv_len;  in __zram_make_request()