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rtc: rx6110: Constify struct regmap_config

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'regmap_spi_config' and 'regmap_i2c_config' are not modified in this diver
and are only used as a const struct regmap_config.

Constifying these structures moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig:
Before:
   text	   data	    bss	    dec	    hex	filename
   8896	   1554	     32	  10482	   28f2	drivers/rtc/rtc-rx6110.o

After:
   text	   data	    bss	    dec	    hex	filename
   9536	    914	     32	  10482	   28f2	drivers/rtc/rtc-rx6110.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/833a7f612c0de9dcb1179a0b75b189c237a335ac.1714862560.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Christophe JAILLET 2024-05-05 00:43:07 +02:00 committed by Alexandre Belloni
parent 1c431b92e2
commit 6a216cbadb
1 changed files with 2 additions and 2 deletions
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4
drivers/rtc/rtc-rx6110.c
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@ -330,7 +330,7 @@ static int rx6110_probe(struct rx6110_data *rx6110, struct device *dev)
}
#if IS_ENABLED(CONFIG_SPI_MASTER)
static struct regmap_config regmap_spi_config = {
static const struct regmap_config regmap_spi_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RX6110_REG_IRQ,
@ -410,7 +410,7 @@ static void rx6110_spi_unregister(void)
#endif /* CONFIG_SPI_MASTER */
#if IS_ENABLED(CONFIG_I2C)
static struct regmap_config regmap_i2c_config = {
static const struct regmap_config regmap_i2c_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RX6110_REG_IRQ,