It looks like the incorrect name of a function parameter was used in the kernel-doc notation, so just change it to the function's parameter name to quell the kernel-doc warning. drivers/gpu/drm/drm_format_helper.c:640: warning: Function parameter or member 'vaddr' not described in 'drm_fb_xrgb8888_to_mono_reversed' drivers/gpu/drm/drm_format_helper.c:640: warning: Excess function parameter 'src' description in 'drm_fb_xrgb8888_to_mono_reversed' Fixes: bcf8b616deb8 ("drm/format-helper: Add drm_fb_xrgb8888_to_mono_reversed()") Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: David Airlie <airlied@xxxxxxxx> Cc: Daniel Vetter <daniel@xxxxxxxx> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx Cc: Javier Martinez Canillas <javierm@xxxxxxxxxx> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx> CC: Maxime Ripard <mripard@xxxxxxxxxx> CC: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/drm_format_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- linux-next-20220401.orig/drivers/gpu/drm/drm_format_helper.c +++ linux-next-20220401/drivers/gpu/drm/drm_format_helper.c @@ -624,7 +624,7 @@ static void drm_fb_gray8_to_mono_reverse * drm_fb_xrgb8888_to_mono_reversed - Convert XRGB8888 to reversed monochrome * @dst: reversed monochrome destination buffer * @dst_pitch: Number of bytes between two consecutive scanlines within dst - * @src: XRGB8888 source buffer + * @vaddr: XRGB8888 source buffer * @fb: DRM framebuffer * @clip: Clip rectangle area to copy *