Le 05/03/2024 à 11:04, Thomas Zimmermann a écrit :
> Hi
>
> Am 05.03.24 um 10:25 schrieb Christophe Leroy:
>>
>> Le 05/03/2024 à 10:01, Thomas Zimmermann a écrit :
>>> Replace <linux/fb.h> with a forward declaration in <asm/backlight.h> to
>>> resolves an unnecessary dependency. Remove pmac_backlight_curve_lookup()
>>> and struct fb_info from source and header files. The function and the
>>> framebuffer struct is unused. No functional changes.
>> When you remove pmac_backlight_curve_lookup() prototype you'll then get
>> a warning/error about missing prototype when building
>> arch/powerpc/platforms/powermac/backlight.c
>>
>> The fonction is not used outside of that file so it should be static.
>> And then it is not used in that file either so it should be removed
>> completely. Indeed last use of that function was removed by commit
>> d565dd3b0824 ("[PATCH] powerpc: More via-pmu backlight fixes") so the
>> function can safely be removed.
>
> Isn't that what my patch is doing? I have no callers of the function in
> my tree (drm-tip), so I removed it entirely. Should I add a Fixes tag
> against commit d565dd3b0824? Best regards Thomas
Sorry I overlooked your patch and focussed on the removal of the
prototype and missed the removal of the function.
Christophe
>>
>> Christophe
>>
>>> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
>>> ---
>>> arch/powerpc/include/asm/backlight.h | 5 ++--
>>> arch/powerpc/platforms/powermac/backlight.c | 26
>>> ---------------------
>>> 2 files changed, 2 insertions(+), 29 deletions(-)
>>>
>>> diff --git a/arch/powerpc/include/asm/backlight.h
>>> b/arch/powerpc/include/asm/backlight.h
>>> index 1b5eab62ed047..061a910d74929 100644
>>> --- a/arch/powerpc/include/asm/backlight.h
>>> +++ b/arch/powerpc/include/asm/backlight.h
>>> @@ -10,15 +10,14 @@
>>> #define __ASM_POWERPC_BACKLIGHT_H
>>> #ifdef __KERNEL__
>>> -#include <linux/fb.h>
>>> #include <linux/mutex.h>
>>> +struct backlight_device;
>>> +
>>> /* For locking instructions, see the implementation file */
>>> extern struct backlight_device *pmac_backlight;
>>> extern struct mutex pmac_backlight_mutex;
>>> -extern int pmac_backlight_curve_lookup(struct fb_info *info, int
>>> value);
>>> -
>>> extern int pmac_has_backlight_type(const char *type);
>>> extern void pmac_backlight_key(int direction);
>>> diff --git a/arch/powerpc/platforms/powermac/backlight.c
>>> b/arch/powerpc/platforms/powermac/backlight.c
>>> index aeb79a8b3e109..12bc01353bd3c 100644
>>> --- a/arch/powerpc/platforms/powermac/backlight.c
>>> +++ b/arch/powerpc/platforms/powermac/backlight.c
>>> @@ -9,7 +9,6 @@
>>> */
>>> #include <linux/kernel.h>
>>> -#include <linux/fb.h>
>>> #include <linux/backlight.h>
>>> #include <linux/adb.h>
>>> #include <linux/pmu.h>
>>> @@ -72,31 +71,6 @@ int pmac_has_backlight_type(const char *type)
>>> return 0;
>>> }
>>> -int pmac_backlight_curve_lookup(struct fb_info *info, int value)
>>> -{
>>> - int level = (FB_BACKLIGHT_LEVELS - 1);
>>> -
>>> - if (info && info->bl_dev) {
>>> - int i, max = 0;
>>> -
>>> - /* Look for biggest value */
>>> - for (i = 0; i < FB_BACKLIGHT_LEVELS; i++)
>>> - max = max((int)info->bl_curve[i], max);
>>> -
>>> - /* Look for nearest value */
>>> - for (i = 0; i < FB_BACKLIGHT_LEVELS; i++) {
>>> - int diff = abs(info->bl_curve[i] - value);
>>> - if (diff < max) {
>>> - max = diff;
>>> - level = i;
>>> - }
>>> - }
>>> -
>>> - }
>>> -
>>> - return level;
>>> -}
>>> -
>>> static void pmac_backlight_key_worker(struct work_struct *work)
>>> {
>>> if (atomic_read(&kernel_backlight_disabled))
>
