[PATCH 15/23] mtd: nand: raw: diskonchip: Marking unused variables as __always_unused

[Lee Jones]

'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.ray...@bootlin.com>
Cc: Richard Weinberger <rich...@nod.at>
Cc: Vignesh Raghavendra <vigne...@ti.com>
Cc: Boris Brezillon <boris.brezil...@collabora.com>
Cc: Dan Brown <dan_br...@ieee.org>
Cc: Kalev Lember <ka...@smartlink.ee>
Cc: David Woodhouse <dw...@infradead.org>
Cc: Fabrice Bellard <fabrice.bell...@netgem.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: linux-...@lists.infradead.org
Signed-off-by: Lee Jones <lee.jo...@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