linux-kernel - [PATCH] sparc: Fix undefined reference to fb_is_primary

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Date: Tue, 20 Feb 2024 01:34:30 +0100
From: Javier Martinez Canillas <javierm@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: kernel test robot <lkp@...el.com>,
	oe-kbuild-all@...ts.linux.dev,
	Javier Martinez Canillas <javierm@...hat.com>,
	Andreas Larsson <andreas@...sler.com>,
	Arnd Bergmann <arnd@...db.de>,
	"David S. Miller" <davem@...emloft.net>,
	Helge Deller <deller@....de>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	sparclinux@...r.kernel.org
Subject: [PATCH] sparc: Fix undefined reference to fb_is_primary_device

Commit 55bffc8170bb ("fbdev: Split frame buffer support in FB and FB_CORE
symbols") added a new FB_CORE Kconfig symbol, that can be enabled to only
have fbcon/VT and DRM fbdev emulation, but without support for any legacy
fbdev driver.

Unfortunately, it missed to change a CONFIG_FB in arch/sparc/Makefile and
that leads to the following linking error in some sparc64 configurations:

   sparc64-linux-ld: drivers/video/fbdev/core/fbcon.o: in function `fbcon_fb_registered':
>> fbcon.c:(.text+0x4f60): undefined reference to `fb_is_primary_device'

Fixes: 55bffc8170bb ("fbdev: Split frame buffer support in FB and FB_CORE symbols")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/r/202401290306.IV8rhJ02-lkp@intel.com/
Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

I don't have a sparc64 toolchain to test this patch, but I'm pretty sure
that this is the correct fix for the linking error reported by the robot.

 arch/sparc/video/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sparc/video/Makefile b/arch/sparc/video/Makefile
index 6baddbd58e4d..d4d83f1702c6 100644
--- a/arch/sparc/video/Makefile
+++ b/arch/sparc/video/Makefile
@@ -1,3 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
-obj-$(CONFIG_FB) += fbdev.o
+obj-$(CONFIG_FB_CORE) += fbdev.o
-- 
2.43.0