[PATCH v2 02/19] arch/arc: Implement <asm/fb.h> with generic helpers

Thomas Zimmermann tzimmermann at suse.de
Mon Apr 17 19:04:39 AEST 2023

Am 06.04.23 um 16:43 schrieb Arnd Bergmann:
> On Thu, Apr 6, 2023, at 16:30, Thomas Zimmermann wrote:
>> +
>>   static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
>>   				unsigned long off)
>>   {
>>   	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
>>   }
>> +#define fb_pgprotect fb_pgprotect
> I still feel that for architectures like arc that don't have
> pgprot_writecombine(), it would b best to go with the
> generic implementation that currently behaves the exact
> same way. If pgprot_writecombine() gets added in the future,
> it would cause the architecture to behave as expected rather
> than introducing the same bug that mips has.

OK, I'll change it.

>        Arnd

Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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