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dmaengine: ste_dma40: fix unneeded variable warning

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clang-9 points out that there are two variables that depending on the
configuration may only be used in an ARRAY_SIZE() expression but not
referenced:

drivers/dma/ste_dma40.c:145:12: error: variable 'd40_backup_regs' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]
static u32 d40_backup_regs[] = {
           ^
drivers/dma/ste_dma40.c:214:12: error: variable 'd40_backup_regs_chan' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]
static u32 d40_backup_regs_chan[] = {

Mark these __maybe_unused to shut up the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20190712091357.744515-1-arnd@arndb.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Arnd Bergmann 2019-07-12 11:13:30 +02:00 committed by Vinod Koul
parent 6f4722b1d1
commit 5d6fb56072
1 changed files with 2 additions and 2 deletions
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4
drivers/dma/ste_dma40.c
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@ -142,7 +142,7 @@ enum d40_events {
* when the DMA hw is powered off. * when the DMA hw is powered off.
* TODO: Add save/restore of D40_DREG_GCC on dma40 v3 or later, if that works. * TODO: Add save/restore of D40_DREG_GCC on dma40 v3 or later, if that works.
*/ */
static u32 d40_backup_regs[] = { static __maybe_unused u32 d40_backup_regs[] = {
D40_DREG_LCPA, D40_DREG_LCPA,
D40_DREG_LCLA, D40_DREG_LCLA,
D40_DREG_PRMSE, D40_DREG_PRMSE,
@ -211,7 +211,7 @@ static u32 d40_backup_regs_v4b[] = {
#define BACKUP_REGS_SZ_V4B ARRAY_SIZE(d40_backup_regs_v4b) #define BACKUP_REGS_SZ_V4B ARRAY_SIZE(d40_backup_regs_v4b)
static u32 d40_backup_regs_chan[] = { static __maybe_unused u32 d40_backup_regs_chan[] = {
D40_CHAN_REG_SSCFG, D40_CHAN_REG_SSCFG,
D40_CHAN_REG_SSELT, D40_CHAN_REG_SSELT,
D40_CHAN_REG_SSPTR, D40_CHAN_REG_SSPTR,