Re: [PATCH 1/2] video: fbmem: Use 'const char' in fb_get_options()

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Tue, Jun 18, 2013 at 10:26:27AM -0300, Fabio Estevam wrote:
> Commit d20d31748 (drm: Constify the pretty-print functions) causes the following
> build warning:
> 
> drivers/gpu/drm/drm_fb_helper.c:127:3: warning: passing argument 1 of 'fb_get_options' discards 'const' qualifier from pointer target type [enabled by default]
> 
> Let's change the first argument of fb_get_options from 'char *' to 'const char *' 
> so that we can get rid of this warning.

I already sent the same patch alongside the drm constify patches. It
just needs to trickle back into the drm tree via the fbdev folks.

> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Dave Airlie <airlied@redhat.com>
> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> ---
>  drivers/video/fbmem.c | 2 +-
>  include/linux/fb.h    | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
> index 098bfc6..d8d5779 100644
> --- a/drivers/video/fbmem.c
> +++ b/drivers/video/fbmem.c
> @@ -1881,7 +1881,7 @@ static int ofonly __read_mostly;
>   *
>   * NOTE: Needed to maintain backwards compatibility
>   */
> -int fb_get_options(char *name, char **option)
> +int fb_get_options(const char *name, char **option)
>  {
>  	char *opt, *options = NULL;
>  	int retval = 0;
> diff --git a/include/linux/fb.h b/include/linux/fb.h
> index d49c60f..ffac70a 100644
> --- a/include/linux/fb.h
> +++ b/include/linux/fb.h
> @@ -624,7 +624,7 @@ extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u3
>  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);
> -extern int fb_get_options(char *name, char **option);
> +extern int fb_get_options(const char *name, char **option);
>  extern int fb_new_modelist(struct fb_info *info);
>  
>  extern struct fb_info *registered_fb[FB_MAX];
> -- 
> 1.8.1.2
> 

-- 
Ville Syrjälä
Intel OTC