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From:   Lee Jones <lee.jones@linaro.org>
To:     vigneshr@ti.com
Cc:     linux-kernel@vger.kernel.org, Lee Jones <lee.jones@linaro.org>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Boris Brezillon <boris.brezillon@collabora.com>,
        Dan Brown <dan_brown@ieee.org>,
        Kalev Lember <kalev@smartlink.ee>,
        David Woodhouse <dwmw2@infradead.org>,
        Fabrice Bellard <fabrice.bellard@netgem.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-mtd@lists.infradead.org
Subject: [PATCH 15/23] mtd: nand: raw: diskonchip: Marking unused variables as __always_unused
Date:   Mon,  2 Nov 2020 11:53:58 +0000
Message-Id: <20201102115406.1074327-16-lee.jones@linaro.org>
In-Reply-To: <20201102115406.1074327-1-lee.jones@linaro.org>
References: <20201102115406.1074327-1-lee.jones@linaro.org>
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'dummy' is never checked (as per the nomenclature) and the use of
'emtpymatch' is currently #if 0'ed out.  We could also #if 0 the
declaration, but #ifery is pretty ugly, so I like to keep it to a
minimum.

Fixes the following W=1 kernel build warning(s):

 drivers/mtd/nand/raw/diskonchip.c: In function ‘DoC_Delay’:
 drivers/mtd/nand/raw/diskonchip.c:219:16: warning: variable ‘dummy’ set but not used [-Wunused-but-set-variable]
 drivers/mtd/nand/raw/diskonchip.c: In function ‘doc200x_calculate_ecc’:
 drivers/mtd/nand/raw/diskonchip.c:706:6: warning: variable ‘emptymatch’ set but not used [-Wunused-but-set-variable]

Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Dan Brown <dan_brown@ieee.org>
Cc: Kalev Lember <kalev@smartlink.ee>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Fabrice Bellard <fabrice.bellard@netgem.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mtd/nand/raw/diskonchip.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/raw/diskonchip.c b/drivers/mtd/nand/raw/diskonchip.c
index 94432a453e5ee..d5050e32cc421 100644
--- a/drivers/mtd/nand/raw/diskonchip.c
+++ b/drivers/mtd/nand/raw/diskonchip.c
@@ -216,7 +216,7 @@ static int doc_ecc_decode(struct rs_control *rs, uint8_t *data, uint8_t *ecc)
 
 static void DoC_Delay(struct doc_priv *doc, unsigned short cycles)
 {
-	volatile char dummy;
+	volatile char __always_unused dummy;
 	int i;
 
 	for (i = 0; i < cycles; i++) {
@@ -703,7 +703,7 @@ static int doc200x_calculate_ecc(struct nand_chip *this, const u_char *dat,
 	struct doc_priv *doc = nand_get_controller_data(this);
 	void __iomem *docptr = doc->virtadr;
 	int i;
-	int emptymatch = 1;
+	int __always_unused emptymatch = 1;
 
 	/* flush the pipeline */
 	if (DoC_is_2000(doc)) {
-- 
2.25.1