arch/arc: Implement <asm/fb.h> with generic helpers

Replace the architecture's fbdev helpers with the generic ones from
<asm-generic/fb.h>. On arc, pgprot_writecombine() and pgprot_noncached()
are the same; hence no functional changes.

v3:
	* use default implementation for fb_pgprotect() (Arnd)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Vineet Gupta <vgupta@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230417125651.25126-3-tzimmermann@suse.de

diff --git a/arch/arc/include/asm/fb.h b/arch/arc/include/asm/fb.h
index dc2e303..9c2383d 100644 (file)
--- a/arch/arc/include/asm/fb.h
+++ b/arch/arc/include/asm/fb.h
@@ -1,20 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+
 #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_noncached(vma->vm_page_prot);
-}
-
-static inline int fb_is_primary_device(struct fb_info *info)
-{
-       return 0;
-}
+#include <asm-generic/fb.h>
 
 #endif /* _ASM_FB_H_ */