[PATCH v2] efi: Pull up arch-specific prototype efi_systab_show_arch()

[Benjamin Thiel]

... in order to fix a -Wmissing-prototypes warning:

arch/x86/platform/efi/efi.c:957:7: warning: no previous prototype for
âefi_systab_show_archâ [-Wmissing-prototypes]
char *efi_systab_show_arch(char *str)

Signed-off-by: Benjamin Thiel <b.thiel@xxxxxxxxx>
---
 drivers/firmware/efi/efi.c | 5 +----
 include/linux/efi.h        | 2 ++
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 911a2bd0f6b7..4e3055238f31 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -130,11 +130,8 @@ static ssize_t systab_show(struct kobject *kobj,
 	if (efi.smbios != EFI_INVALID_TABLE_ADDR)
 		str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios);
 
-	if (IS_ENABLED(CONFIG_IA64) || IS_ENABLED(CONFIG_X86)) {
-		extern char *efi_systab_show_arch(char *str);
-
+	if (IS_ENABLED(CONFIG_IA64) || IS_ENABLED(CONFIG_X86))
 		str = efi_systab_show_arch(str);
-	}
 
 	return str - buf;
 }
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 251f1f783cdf..9430d01c0c3d 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1245,4 +1245,6 @@ struct linux_efi_memreserve {
 
 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
 
+char *efi_systab_show_arch(char *str);
+
 #endif /* _LINUX_EFI_H */
-- 
2.20.1