We don't free page in zram_free_page(), not all slots even
have any memory associated with them (e.g. ZRAM_SAME).  We
free the slot (or reset it), rename the function accordingly.

Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
---
 drivers/block/zram/zram_drv.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index eef6c0a675b5..d8054b3cafaa 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -56,7 +56,7 @@ static size_t huge_class_size;
 
 static const struct block_device_operations zram_devops;
 
-static void zram_free_page(struct zram *zram, size_t index);
+static void zram_slot_free(struct zram *zram, u32 index);
 static int zram_read_from_zspool_raw(struct zram *zram, struct page *page,
 				     u32 index);
 
@@ -927,7 +927,7 @@ static int zram_writeback_complete(struct zram *zram, struct zram_wb_req *req)
 	prio = zram_get_priority(zram, index);
 	huge = zram_test_flag(zram, index, ZRAM_HUGE);
 
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_set_flag(zram, index, ZRAM_WB);
 	if (huge)
 		zram_set_flag(zram, index, ZRAM_HUGE);
@@ -1966,7 +1966,7 @@ static void zram_meta_free(struct zram *zram, u64 disksize)
 
 	/* Free all pages that are still in this zram device */
 	for (index = 0; index < num_pages; index++)
-		zram_free_page(zram, index);
+		zram_slot_free(zram, index);
 
 	zs_destroy_pool(zram->mem_pool);
 	vfree(zram->table);
@@ -1998,7 +1998,7 @@ static bool zram_meta_alloc(struct zram *zram, u64 disksize)
 	return true;
 }
 
-static void zram_free_page(struct zram *zram, size_t index)
+static void zram_slot_free(struct zram *zram, u32 index)
 {
 	unsigned long handle;
 
@@ -2197,7 +2197,7 @@ static int write_same_filled_page(struct zram *zram, unsigned long fill,
 				  u32 index)
 {
 	zram_slot_lock(zram, index);
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_set_flag(zram, index, ZRAM_SAME);
 	zram_set_handle(zram, index, fill);
 	zram_slot_unlock(zram, index);
@@ -2235,7 +2235,7 @@ static int write_incompressible_page(struct zram *zram, struct page *page,
 	kunmap_local(src);
 
 	zram_slot_lock(zram, index);
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_set_flag(zram, index, ZRAM_HUGE);
 	zram_set_handle(zram, index, handle);
 	zram_set_obj_size(zram, index, PAGE_SIZE);
@@ -2300,7 +2300,7 @@ static int zram_write_page(struct zram *zram, struct page *page, u32 index)
 	zcomp_stream_put(zstrm);
 
 	zram_slot_lock(zram, index);
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_set_handle(zram, index, handle);
 	zram_set_obj_size(zram, index, comp_len);
 	zram_slot_unlock(zram, index);
@@ -2522,7 +2522,7 @@ static int recompress_slot(struct zram *zram, u32 index, struct page *page,
 	zs_obj_write(zram->mem_pool, handle_new, zstrm->buffer, comp_len_new);
 	zcomp_stream_put(zstrm);
 
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_set_handle(zram, index, handle_new);
 	zram_set_obj_size(zram, index, comp_len_new);
 	zram_set_priority(zram, index, prio);
@@ -2725,7 +2725,7 @@ static void zram_bio_discard(struct zram *zram, struct bio *bio)
 
 	while (n >= PAGE_SIZE) {
 		zram_slot_lock(zram, index);
-		zram_free_page(zram, index);
+		zram_slot_free(zram, index);
 		zram_slot_unlock(zram, index);
 		atomic64_inc(&zram->stats.notify_free);
 		index++;
@@ -2833,7 +2833,7 @@ static void zram_slot_free_notify(struct block_device *bdev,
 		return;
 	}
 
-	zram_free_page(zram, index);
+	zram_slot_free(zram, index);
 	zram_slot_unlock(zram, index);
 }
 
-- 
2.52.0.487.g5c8c507ade-goog