scsi: target: tcmu: Fix warning: 'page' may be used uninitialized

Corrects drivers/target/target_core_user.c:688:6: warning: 'page' may be
used uninitialized.

Link: https://lore.kernel.org/r/[email protected]
Fixes: 3c58f73 ("scsi: target: tcmu: Optimize use of flush_dcache_page")
Cc: Mike Christie <[email protected]>
Acked-by: Mike Christie <[email protected]>
Signed-off-by: John Donnelly <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: John Donnelly

drivers/target/target_core_user.c

@@ -699,7 +699,7 @@ static void scatter_data_area(struct tcmu_dev *udev, struct tcmu_cmd *tcmu_cmd,
 	void *from, *to = NULL;
 	size_t copy_bytes, offset;
 	struct scatterlist *sg;
-	struct page *page;
+	struct page *page = NULL;
 
 	for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, i) {
 		int sg_remaining = sg->length;