On Mon, Apr 17, 2023, at 11:03, Thomas Zimmermann wrote:
Am 11.04.23 um 10:08 schrieb Geert Uytterhoeven:
On Thu, Apr 6, 2023 at 4:30 PM Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:
+#ifndef fb_pgprotect
+#define fb_pgprotect fb_pgprotect
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+ unsigned long off)
Does this affect any noMMU platforms that relied on fb_pgprotect()
doing nothing before?
Perhaps the body below should be protected by "#ifdef CONFIG_MMU"?
I cannot conclusively answer this question, but I did some grep'ing
('git grep ndef | grep CONFIG_MMU'):
Only the architectures in this patchset provide <asm/fb.h> but nothing
anywhere uses <asm-generic/fb.h> yet. And of those architectures, only
arm and m68k have !CONFIG_MMU cases. Those are handled in the rsp
patches. I think we're good.
Agreed. The generic version is just a more elaborate way to do
nothing here, as the
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
line on nommu just turns into a self-assignment of the same member
that was set the line before.
Arnd
