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33253d9e01
Move the default fb_mmap code for I/O address spaces into the helper function fb_io_mmap(). The helper can either be called via struct fb_ops.fb_mmap or as the default if no fb_mmap has been set. Also set the new helper in __FB_DEFAULT_IOMEM_OPS_MMAP. In the mid-term, fb_io_mmap() is supposed to become optional. Fbdev drivers will initialize their struct fb_ops.fb_mmap to the helper and select a corresponding Kconfig token. The helper can then be made optional at compile time. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231127131655.4020-31-tzimmermann@suse.de