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fbdev: Declare src parameter of fb_pad_ helpers as constant

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Fbdev's padding helpers do not modify the source buffer. Declare the
parameter as 'const'.

Fbcon's font-rendering code calls these helpers with the font data.
Declaring src as const will allow for making the font data constant
as well.

While at it, also remove the extern qualifier from the function
declarations in the header file.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Thomas Zimmermann 2026-03-09 15:14:43 +01:00 committed by Helge Deller
parent 02fe86e5fc
commit b9e0180b2e
2 changed files with 8 additions and 8 deletions
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6
drivers/video/fbdev/core/fbmem.c
View File

@ -91,14 +91,14 @@ EXPORT_SYMBOL(fb_get_color_depth);
/*
* Data padding functions.
*/
void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 s_pitch, u32 height)
{
__fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
}
EXPORT_SYMBOL(fb_pad_aligned_buffer);
void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
u32 shift_high, u32 shift_low, u32 mod)
void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 idx, u32 height,
u32 shift_high, u32 shift_low, u32 mod)
{
u8 mask = (u8) (0xff << shift_high), tmp;
int i, j;

10
include/linux/fb.h
View File

@ -602,9 +602,9 @@ extern int register_framebuffer(struct fb_info *fb_info);
extern void unregister_framebuffer(struct fb_info *fb_info);
extern int devm_register_framebuffer(struct device *dev, struct fb_info *fb_info);
extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
u32 height, u32 shift_high, u32 shift_low, u32 mod);
extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 idx, u32 height,
u32 shift_high, u32 shift_low, u32 mod);
void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 s_pitch, u32 height);
extern void fb_set_suspend(struct fb_info *info, int state);
extern int fb_get_color_depth(struct fb_var_screeninfo *var,
struct fb_fix_screeninfo *fix);
@ -630,8 +630,8 @@ static inline struct device *dev_of_fbinfo(const struct fb_info *info)
#endif
}
static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
u8 *src, u32 s_pitch, u32 height)
static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, const u8 *src, u32 s_pitch,
u32 height)
{
u32 i, j;