peci: npcm: Constify struct peci_controller_ops​

'struct peci_controller_ops' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   8003	    784	     48	   8835	   2283	drivers/peci/controller/peci-npcm.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   8003	    776	     48	   8827	   227b	drivers/peci/controller/peci-npcm.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/3c7d455745c2265c19ed02f026dfc9610271d3c2.1725692376.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>

diff --git a/drivers/peci/controller/peci-npcm.c b/drivers/peci/controller/peci-npcm.c
index ec613d3..fa91be5 100644 (file)
--- a/drivers/peci/controller/peci-npcm.c
+++ b/drivers/peci/controller/peci-npcm.c
@@ -224,7 +224,7 @@ static const struct regmap_config npcm_peci_regmap_config = {
        .fast_io = true,
 };
 
-static struct peci_controller_ops npcm_ops = {
+static const struct peci_controller_ops npcm_ops = {
        .xfer = npcm_peci_xfer,
 };