linux-kernel - [PATCH] Avoid compiler warning by storing the result of rq_data

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Date:	Sun,  2 Aug 2015 03:36:52 -0700
From:	Tomer Barletz <barletz@...il.com>
To:	dwmw2@...radead.org, computersforpeace@...il.com
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Tomer Barletz <barletz@...il.com>
Subject: [PATCH] Avoid compiler warning by storing the result of rq_data_dir() in an int variable

With gcc 5.1 I get:
warning: switch condition has boolean value [-Wswitch-bool]

Signed-off-by: Tomer Barletz <barletz@...il.com>
---
 drivers/mtd/mtd_blkdevs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 41acc50..8c3715c 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -79,6 +79,7 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
 {
 	unsigned long block, nsect;
 	char *buf;
+	int rq;
 
 	block = blk_rq_pos(req) << 9 >> tr->blkshift;
 	nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
@@ -97,7 +98,8 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
 	if (req->cmd_flags & REQ_DISCARD)
 		return tr->discard(dev, block, nsect);
 
-	switch(rq_data_dir(req)) {
+	rq = rq_data_dir(req);
+	switch(rq) {
 	case READ:
 		for (; nsect > 0; nsect--, block++, buf += tr->blksize)
 			if (tr->readsect(dev, block, buf))
-- 
2.4.3

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