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[v5,1/5] fbdev: Avoid file argument in fb_pgprotect()

Message ID 20230922080636.26762-2-tzimmermann@suse.de
State New
Headers show
Series ppc, fbdev: Clean up fbdev mmap helper | expand

Commit Message

Thomas Zimmermann Sept. 22, 2023, 8:04 a.m. UTC 
Only PowerPC's fb_pgprotect() needs the file argument, although
the implementation in either phys_mem_access_prot() or
pci_phys_mem_access_prot() does not use it. Pass NULL to the internal
helper in preparation of further updates. A later patch will remove
the file parameter from fb_pgprotect().

While at it, replace the shift operation with PHYS_PFN().

v5:
	* state function names in commit description (Javier)

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
 arch/powerpc/include/asm/fb.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/powerpc/include/asm/fb.h b/arch/powerpc/include/asm/fb.h
index 5f1a2e5f76548..61e3b8806db69 100644
--- a/arch/powerpc/include/asm/fb.h
+++ b/arch/powerpc/include/asm/fb.h
@@ -9,7 +9,12 @@ 
 static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
 				unsigned long off)
 {
-	vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
+	/*
+	 * PowerPC's implementation of phys_mem_access_prot() does
+	 * not use the file argument. Set it to NULL in preparation
+	 * of later updates to the interface.
+	 */
+	vma->vm_page_prot = phys_mem_access_prot(NULL, PHYS_PFN(off),
 						 vma->vm_end - vma->vm_start,
 						 vma->vm_page_prot);
 }