fbdev/deferred-io: Test screen_buffer for vmalloc'ed memory

Framebuffers in virtual memory are available via screen_buffer. Use
it instead of screen_base and avoid the type casting.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-5-tzimmermann@suse.de

diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c
index a10ba09639ada92b452e368e43f1dc9e16f0b374..45e8708eb223a9d48426961e5475e4eca1e65fa1 100644 (file)
--- a/drivers/video/fbdev/core/fb_defio.c
+++ b/drivers/video/fbdev/core/fb_defio.c
@@ -25,11 +25,11 @@
 
 static struct page *fb_deferred_io_page(struct fb_info *info, unsigned long offs)
 {
-       void *screen_base = (void __force *) info->screen_base;
+       const void *screen_buffer = info->screen_buffer;
        struct page *page;
 
-       if (is_vmalloc_addr(screen_base + offs))
-               page = vmalloc_to_page(screen_base + offs);
+       if (is_vmalloc_addr(screen_buffer + offs))
+               page = vmalloc_to_page(screen_buffer + offs);
        else
                page = pfn_to_page((info->fix.smem_start + offs) >> PAGE_SHIFT);