linux-kernel - [PATCH][RESEND] zram: move backing_dev under macro CONFIG_ZRAM

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Message-Id: <20210521060544.2385-1-zbestahu@gmail.com>
Date:   Fri, 21 May 2021 14:05:44 +0800
From:   Yue Hu <zbestahu@...il.com>
To:     minchan@...nel.org, ngupta@...are.org, senozhatsky@...omium.org,
        axboe@...nel.dk
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        huyue2@...ong.com, zbestahu@....com,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [PATCH][RESEND] zram: move backing_dev under macro CONFIG_ZRAM_WRITEBACK

From: Yue Hu <huyue2@...ong.com>

backing_dev is never used when not enable CONFIG_ZRAM_WRITEBACK and
it's introduced from writeback feature. So it's needless also affect
readability in that case.

Signed-off-by: Yue Hu <huyue2@...ong.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Acked-by: Minchan Kim <minchan@...nel.org>
---
 drivers/block/zram/zram_drv.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index 419a7e8..6e73dc3 100644
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -113,8 +113,8 @@ struct zram {
 	 * zram is claimed so open request will be failed
 	 */
 	bool claim; /* Protected by bdev->bd_mutex */
-	struct file *backing_dev;
 #ifdef CONFIG_ZRAM_WRITEBACK
+	struct file *backing_dev;
 	spinlock_t wb_limit_lock;
 	bool wb_limit_enable;
 	u64 bd_wb_limit;
-- 
1.9.1