From: "Antonino A. Daplas" Since vfb's framebuffer is vmalloc'ed, use the fb_sys_read() and fb_sys_write(). Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton --- drivers/video/Kconfig | 1 + drivers/video/vfb.c | 2 ++ 2 files changed, 3 insertions(+) diff -puN drivers/video/Kconfig~vfb-us-fb_sys_read-and-fb_sys_write drivers/video/Kconfig --- a/drivers/video/Kconfig~vfb-us-fb_sys_read-and-fb_sys_write +++ a/drivers/video/Kconfig @@ -1714,6 +1714,7 @@ config FB_VIRTUAL select FB_SYS_FILLRECT select FB_SYS_COPYAREA select FB_SYS_IMAGEBLIT + select FB_SYS_FOPS ---help--- This is a `virtual' frame buffer device. It operates on a chunk of unswappable kernel memory instead of on the memory of a graphics diff -puN drivers/video/vfb.c~vfb-us-fb_sys_read-and-fb_sys_write drivers/video/vfb.c --- a/drivers/video/vfb.c~vfb-us-fb_sys_read-and-fb_sys_write +++ a/drivers/video/vfb.c @@ -84,6 +84,8 @@ static int vfb_mmap(struct fb_info *info struct vm_area_struct *vma); static struct fb_ops vfb_ops = { + .fb_read = fb_sys_read, + .fb_write = fb_sys_write, .fb_check_var = vfb_check_var, .fb_set_par = vfb_set_par, .fb_setcolreg = vfb_setcolreg, _