[PATCH] efi: fix missing prototype warnings

[Arnd Bergmann]

From: Arnd Bergmann <arnd@xxxxxxxx>

The cper.c file needs to include an extra header, and
efi_zboot_entry needs an extern declaration to avoid these
'make W=1' warnings:

drivers/firmware/efi/libstub/zboot.c:65:1: error: no previous prototype for 'efi_zboot_entry' [-Werror=missing-prototypes]
drivers/firmware/efi/efi.c:176:16: error: no previous prototype for 'efi_attr_is_visible' [-Werror=missing-prototypes]
drivers/firmware/efi/cper.c:626:6: error: no previous prototype for 'cper_estatus_print' [-Werror=missing-prototypes]
drivers/firmware/efi/cper.c:649:5: error: no previous prototype for 'cper_estatus_check_header' [-Werror=missing-prototypes]
drivers/firmware/efi/cper.c:662:5: error: no previous prototype for 'cper_estatus_check' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/firmware/efi/cper.c            | 1 +
 drivers/firmware/efi/libstub/efistub.h | 3 +++
 include/linux/efi.h                    | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index 35c37f667781..75715c7be34a 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -25,6 +25,7 @@
 #include <acpi/ghes.h>
 #include <ras/ras_event.h>
 #include "cper_cxl.h"
+#include "../../acpi/apei/apei-internal.h"
 
 /*
  * CPER record ID need to be unique even after reboot, because record
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 67d5a20802e0..54a2822cae77 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -1133,4 +1133,7 @@ const u8 *__efi_get_smbios_string(const struct efi_smbios_record *record,
 void efi_remap_image(unsigned long image_base, unsigned alloc_size,
 		     unsigned long code_size);
 
+asmlinkage efi_status_t __efiapi
+efi_zboot_entry(efi_handle_t handle, efi_system_table_t *systab);
+
 #endif
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 7aa62c92185f..571d1a6e1b74 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1338,4 +1338,6 @@ bool efi_config_table_is_usable(const efi_guid_t *guid, unsigned long table)
 	return xen_efi_config_table_is_usable(guid, table);
 }
 
+umode_t efi_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n);
+
 #endif /* _LINUX_EFI_H */
-- 
2.39.2