From: Javier Martinez Canillas javierm@redhat.com
commit 4bc5e64e6cf37007e436970024e5998ee0935651 upstream.
Commit 8633ef82f101 ("drivers/firmware: consolidate EFI framebuffer setup for all arches") made the Generic System Framebuffers (sysfb) driver able to be built on non-x86 architectures.
But it left the efifb_setup_from_dmi() function prototype declaration in the architecture specific headers. This could lead to the following compiler warning as reported by the kernel test robot:
drivers/firmware/efi/sysfb_efi.c:70:6: warning: no previous prototype for function 'efifb_setup_from_dmi' [-Wmissing-prototypes] void efifb_setup_from_dmi(struct screen_info *si, const char *opt) ^ drivers/firmware/efi/sysfb_efi.c:70:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
Fixes: 8633ef82f101 ("drivers/firmware: consolidate EFI framebuffer setup for all arches") Reported-by: kernel test robot lkp@intel.com Cc: stable@vger.kernel.org # 5.15.x Signed-off-by: Javier Martinez Canillas javierm@redhat.com Acked-by: Thomas Zimmermann tzimmermann@suse.de Link: https://lore.kernel.org/r/20211126001333.555514-1-javierm@redhat.com Signed-off-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/include/asm/efi.h | 1 - arch/arm64/include/asm/efi.h | 1 - arch/riscv/include/asm/efi.h | 1 - arch/x86/include/asm/efi.h | 2 -- include/linux/efi.h | 6 ++++++ 5 files changed, 6 insertions(+), 5 deletions(-)
--- a/arch/arm/include/asm/efi.h +++ b/arch/arm/include/asm/efi.h @@ -17,7 +17,6 @@
#ifdef CONFIG_EFI void efi_init(void); -extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md); --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -14,7 +14,6 @@
#ifdef CONFIG_EFI extern void efi_init(void); -extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); #else #define efi_init() #endif --- a/arch/riscv/include/asm/efi.h +++ b/arch/riscv/include/asm/efi.h @@ -13,7 +13,6 @@
#ifdef CONFIG_EFI extern void efi_init(void); -extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); #else #define efi_init() #endif --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -197,8 +197,6 @@ static inline bool efi_runtime_supported
extern void parse_efi_setup(u64 phys_addr, u32 data_len);
-extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); - extern void efi_thunk_runtime_setup(void); efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size, unsigned long descriptor_size, --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -1282,4 +1282,10 @@ static inline struct efi_mokvar_table_en } #endif
+#ifdef CONFIG_SYSFB +extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt); +#else +static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt) { } +#endif + #endif /* _LINUX_EFI_H */