efi_loader: use const for GUIDs in the EFI_FILE_PROTOCOL

Use const efi_guid_t* when passing GUIDs.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

include/efi_api.h

@@ -866,10 +866,10 @@ struct efi_file_handle {
 	efi_status_t (EFIAPI *setpos)(struct efi_file_handle *file,
 			efi_uintn_t pos);
 	efi_status_t (EFIAPI *getinfo)(struct efi_file_handle *file,
-			efi_guid_t *info_type, efi_uintn_t *buffer_size,
+			const efi_guid_t *info_type, efi_uintn_t *buffer_size,
 			void *buffer);
 	efi_status_t (EFIAPI *setinfo)(struct efi_file_handle *file,
-			efi_guid_t *info_type, efi_uintn_t buffer_size,
+			const efi_guid_t *info_type, efi_uintn_t buffer_size,
 			void *buffer);
 	efi_status_t (EFIAPI *flush)(struct efi_file_handle *file);
 };

lib/efi_loader/efi_file.c

@@ -429,7 +429,7 @@ error:
 }
 
 static efi_status_t EFIAPI efi_file_getinfo(struct efi_file_handle *file,
-					    efi_guid_t *info_type,
+					    const efi_guid_t *info_type,
 					    efi_uintn_t *buffer_size,
 					    void *buffer)
 {
@@ -481,7 +481,7 @@ error:
 }
 
 static efi_status_t EFIAPI efi_file_setinfo(struct efi_file_handle *file,
-					    efi_guid_t *info_type,
+					    const efi_guid_t *info_type,
 					    efi_uintn_t buffer_size,
 					    void *buffer)
 {