linux-kernel - [PATCH 10/34] efi: sysfb: don't build when EFI is disabled

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Date: Wed,  3 Apr 2024 10:06:28 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: linux-kernel@...r.kernel.org,
	Ard Biesheuvel <ardb@...nel.org>,
	Javier Martinez Canillas <javierm@...hat.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Arnd Bergmann <arnd@...db.de>,
	Ilias Apalodimas <ilias.apalodimas@...aro.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	"Borislav Petkov (AMD)" <bp@...en8.de>,
	Masahisa Kojima <masahisa.kojima@...aro.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-efi@...r.kernel.org
Subject: [PATCH 10/34] efi: sysfb: don't build when EFI is disabled

From: Arnd Bergmann <arnd@...db.de>

With 'make W=1', there is a warning when EFI is turned off but sysfb_efi
still gets built:

drivers/firmware/efi/sysfb_efi.c:188:35: error: unused variable 'efifb_dmi_system_table' [-Werror,-Wunused-const-variable]
static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
                                  ^
drivers/firmware/efi/sysfb_efi.c:238:35: error: unused variable 'efifb_dmi_swap_width_height' [-Werror,-Wunused-const-variable]
static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
                                  ^
drivers/firmware/efi/sysfb_efi.c:297:28: error: unused function 'find_pci_overlap_node' [-Werror,-Wunused-function]
static struct device_node *find_pci_overlap_node(void)

There was an earlier patch to address the duplicate function definitions, but
that missed how we should not be building this file in the first place.

Fixes: 15d27b15de96 ("efi: sysfb_efi: fix build when EFI is not set")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/firmware/efi/Makefile    | 3 ++-
 drivers/firmware/efi/sysfb_efi.c | 2 --
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index a2d0009560d0..3baf80d8cf81 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -30,7 +30,8 @@ obj-$(CONFIG_EFI_RCI2_TABLE)		+= rci2-table.o
 obj-$(CONFIG_EFI_EMBEDDED_FIRMWARE)	+= embedded-firmware.o
 obj-$(CONFIG_LOAD_UEFI_KEYS)		+= mokvar-table.o
 
-obj-$(CONFIG_SYSFB)			+= sysfb_efi.o
+sysfb-$(CONFIG_SYSFB)			+= sysfb_efi.o
+obj-$(CONFIG_EFI)			+= $(sysfb-y)
 
 arm-obj-$(CONFIG_EFI)			:= efi-init.o arm-runtime.o
 obj-$(CONFIG_ARM)			+= $(arm-obj-y)
diff --git a/drivers/firmware/efi/sysfb_efi.c b/drivers/firmware/efi/sysfb_efi.c
index cc807ed35aed..a8c982475f6b 100644
--- a/drivers/firmware/efi/sysfb_efi.c
+++ b/drivers/firmware/efi/sysfb_efi.c
@@ -346,7 +346,6 @@ static const struct fwnode_operations efifb_fwnode_ops = {
 	.add_links = efifb_add_links,
 };
 
-#ifdef CONFIG_EFI
 static struct fwnode_handle efifb_fwnode;
 
 __init void sysfb_apply_efi_quirks(void)
@@ -372,4 +371,3 @@ __init void sysfb_set_efifb_fwnode(struct platform_device *pd)
 		pd->dev.fwnode = &efifb_fwnode;
 	}
 }
-#endif
-- 
2.39.2