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fbdev: mmp: Constify struct mmp_overlay_ops

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'struct mmp_overlay_ops' is not modified in this driver.

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

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  11798	    555	     16	  12369	   3051	drivers/video/fbdev/mmp/hw/mmp_ctrl.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  11834	    507	     16	  12357	   3045	drivers/video/fbdev/mmp/hw/mmp_ctrl.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Christophe JAILLET 2024-06-24 21:59:42 +02:00 committed by Helge Deller
parent c260bda655
commit b65bd7874b
2 changed files with 3 additions and 3 deletions
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2
drivers/video/fbdev/mmp/hw/mmp_ctrl.c
View File

@ -313,7 +313,7 @@ static void path_set_mode(struct mmp_path *path, struct mmp_mode *mode)
mutex_unlock(&path->access_ok);
}
static struct mmp_overlay_ops mmphw_overlay_ops = {
static const struct mmp_overlay_ops mmphw_overlay_ops = {
.set_fetch = overlay_set_fetch,
.set_onoff = overlay_set_onoff,
.set_win = overlay_set_win,

4
include/video/mmp_disp.h
View File

@ -156,7 +156,7 @@ struct mmp_overlay {
int status;
struct mutex access_ok;
struct mmp_overlay_ops *ops;
const struct mmp_overlay_ops *ops;
};
/* panel type */
@ -299,7 +299,7 @@ struct mmp_path_info {
int overlay_num;
void (*set_mode)(struct mmp_path *path, struct mmp_mode *mode);
void (*set_onoff)(struct mmp_path *path, int status);
struct mmp_overlay_ops *overlay_ops;
const struct mmp_overlay_ops *overlay_ops;
void *plat_data;
};