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

[Benjamin Thiel <b.thiel@posteo.de>]

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

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

Signed-off-by: Benjamin Thiel <b.thiel@posteo.de>
---
 drivers/firmware/efi/efi.c | 7 ++-----
 include/linux/efi.h        | 4 ++++
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 911a2bd0f6b7..d3e7ce6f1027 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;
 }
@@ -1012,4 +1009,4 @@ static int __init register_update_efi_random_seed(void)
 	return register_reboot_notifier(&efi_random_seed_nb);
 }
 late_initcall(register_update_efi_random_seed);
-#endif
+#endifefi_systab_show_arch
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 251f1f783cdf..e47dae8c8d5f 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1245,4 +1245,8 @@ struct linux_efi_memreserve {
 
 void __init efi_arch_mem_reserve(phys_addr_t addr, u64 size);
 
+#if defined(CONFIG_IA64) || defined(CONFIG_X86)
+extern char *efi_systab_show_arch(char *str);
+#endif
+
 #endif /* _LINUX_EFI_H */
-- 
2.20.1