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Fri, 01 May 2026 13:43:15 -0700 (PDT) Received: from PF5YBGDS.localdomain ([163.114.130.5]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b5390ec38asm33730096d6.11.2026.05.01.13.43.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2026 13:43:14 -0700 (PDT) From: mike.marciniszyn@gmail.com To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Alex Deucher , Javier Martinez Canillas , Andrew Lunn Cc: mike.marciniszyn@gmail.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Mike Marciniszyn , stable@vger.kernel.org Subject: [PATCH] drm/fbdev-helper: Fix deletion of stub for drm_fb_helper_gem_is_fb() Date: Fri, 1 May 2026 16:43:13 -0400 Message-ID: <20260501204313.127616-1-mike.marciniszyn@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Mike Marciniszyn When CONFIG_DRM_FBDEV_EMULATION is not defined this error results when building amdgpu_display.c with CONFIG_DRM_AMDGPU: error: call to undeclared function 'drm_fb_helper_gem_is_fb'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1777 | if (!drm_fb_helper_gem_is_fb(dev->fb_helper, fb->obj[0])) { Cc: stable@vger.kernel.org Signed-off-by: Mike Marciniszyn Reviewed-by: Dmitry Ilvokhin --- include/drm/drm_fb_helper.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index bf391903443d..7f9ad421af3f 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -273,6 +273,13 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *= fb_helper); int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper); bool drm_fb_helper_gem_is_fb(const struct drm_fb_helper *fb_helper, const struct drm_gem_object *obj); +#else +static inline bool drm_fb_helper_gem_is_fb(const struct drm_fb_helper *fb_= helper, + const struct drm_gem_object *obj) +{ + return false; +} + #endif #endif -- 2.43.0