Re: [PATCH v3 16/19] arch/sh: Implement <asm/fb.h> with generic helpers

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Am 17.04.23 um 16:06 schrieb Thomas Zimmermann:
Hi

Am 17.04.23 um 15:02 schrieb John Paul Adrian Glaubitz:
Hi Thomas!

On Mon, 2023-04-17 at 14:56 +0200, Thomas Zimmermann wrote:
Replace the architecture's fbdev helpers with the generic
ones from <asm-generic/fb.h>. No functional changes.

v2:
    * use default implementation for fb_pgprotect() (Arnd)

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
---
  arch/sh/include/asm/fb.h | 15 +--------------
  1 file changed, 1 insertion(+), 14 deletions(-)

diff --git a/arch/sh/include/asm/fb.h b/arch/sh/include/asm/fb.h
index 9a0bca2686fd..19df13ee9ca7 100644
--- a/arch/sh/include/asm/fb.h
+++ b/arch/sh/include/asm/fb.h
@@ -2,19 +2,6 @@
  #ifndef _ASM_FB_H_
  #define _ASM_FB_H_
-#include <linux/fb.h>
-#include <linux/fs.h>
-#include <asm/page.h>
-
-static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
-                unsigned long off)
-{
-    vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-}

Looking at the macro in asm-generic/fb.h, fb_pgprotect() is being replaced with a no-op function. Is that intentional? Can you briefly explain the background
for this change?

Patch 01 of this patchset changes the generic fb_pgprotect() to set pgprot_writecombine(). So on SH, there should be no change at all.

In case you didn't receive that patch:

  https://patchwork.freedesktop.org/patch/532493/?series=116157&rev=3


Best regards
Thomas


-static inline int fb_is_primary_device(struct fb_info *info)
-{
-    return 0;
-}
+#include <asm-generic/fb.h>
  #endif /* _ASM_FB_H_ */

Thanks,
Adrian



--
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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