Thread (2 messages) 2 messages, 2 authors, 2017-08-01

[PATCH] video/mbx: constify fb_fix_screeninfo and fb_var_screeninfo structures

STALE3352d

From: Gustavo A. R. Silva <hidden>
Date: 2017-07-08 01:10:06
Also in: lkml
Subsystem: framebuffer layer, the rest · Maintainers: Helge Deller, Linus Torvalds

These structures are only used to copy into other structures,
so declare them as const.

This issue was detected using Coccinelle and the following semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct fb_fix_screeninfo i@p = { ... };

@ok@
identifier r.i;
expression e;
position p;
@@
e = i@p

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct fb_fix_screeninfo e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct fb_fix_screeninfo i = { ... };

The semantic patch for fb_var_screeninfo is analogous.

Signed-off-by: Gustavo A. R. Silva <redacted>
---
 drivers/video/fbdev/mbx/mbxfb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/video/fbdev/mbx/mbxfb.c b/drivers/video/fbdev/mbx/mbxfb.c
index 698df954..539b85d 100644
--- a/drivers/video/fbdev/mbx/mbxfb.c
+++ b/drivers/video/fbdev/mbx/mbxfb.c
@@ -79,7 +79,7 @@ struct mbxfb_info {
 
 };
 
-static struct fb_var_screeninfo mbxfb_default = {
+static const struct fb_var_screeninfo mbxfb_default = {
 	.xres = 640,
 	.yres = 480,
 	.xres_virtual = 640,
@@ -102,7 +102,7 @@ static struct fb_var_screeninfo mbxfb_default = {
 	.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 };
 
-static struct fb_fix_screeninfo mbxfb_fix = {
+static const struct fb_fix_screeninfo mbxfb_fix = {
 	.id = "MBX",
 	.type = FB_TYPE_PACKED_PIXELS,
 	.visual = FB_VISUAL_TRUECOLOR,
-- 
2.5.0
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