efi_loader: avoid multiple local copies of lf2_initrd_guid

Create the GUID as a global variable.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

cmd/efidebug.c

@@ -1144,7 +1144,6 @@ static void show_efi_boot_opt_data(u16 *varname16, void *data, size_t *size)
 	struct efi_device_path *initrd_path = NULL;
 	struct efi_load_option lo;
 	efi_status_t ret;
-	const efi_guid_t lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
 
 	ret = efi_deserialize_load_option(&lo, data, size);
 	if (ret != EFI_SUCCESS) {
@@ -1165,7 +1164,7 @@ static void show_efi_boot_opt_data(u16 *varname16, void *data, size_t *size)
 
 	printf("  file_path: %pD\n", lo.file_path);
 
-	initrd_path = efi_dp_from_lo(&lo, &lf2_initrd_guid);
+	initrd_path = efi_dp_from_lo(&lo, &efi_lf2_initrd_guid);
 	if (initrd_path) {
 		printf("  initrd_path: %pD\n", initrd_path);
 		efi_free_pool(initrd_path);

include/efi_load_initrd.h

@@ -16,6 +16,7 @@
 #define EFI_INITRD_MEDIA_GUID \
 	EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, \
 		 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
+extern const efi_guid_t efi_lf2_initrd_guid;
 
 struct efi_initrd_dp {
 	struct efi_device_path_vendor vendor;

lib/efi_loader/efi_helper.c

@@ -13,6 +13,11 @@
 #include <efi_loader.h>
 #include <efi_variable.h>
 
+#if defined(CONFIG_CMD_EFIDEBUG) || defined(CONFIG_EFI_LOAD_FILE2_INITRD)
+/* GUID used by Linux to identify the LoadFile2 protocol with the initrd */
+const efi_guid_t efi_lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
+#endif
+
 /**
  * efi_create_current_boot_var() - Return Boot#### name were #### is replaced by
  *			           the value of BootCurrent

lib/efi_loader/efi_load_initrd.c

@@ -52,7 +52,6 @@ static efi_handle_t efi_initrd_handle;
  */
 static efi_status_t get_initrd_fp(struct efi_device_path **initrd_fp)
 {
-	const efi_guid_t lf2_initrd_guid = EFI_INITRD_MEDIA_GUID;
 	struct efi_device_path *dp = NULL;
 
 	/*
@@ -65,7 +64,7 @@ static efi_status_t get_initrd_fp(struct efi_device_path **initrd_fp)
 	 * We can then use this specific return value and not install the
 	 * protocol, while allowing the boot to continue
 	 */
-	dp = efi_get_dp_from_boot(lf2_initrd_guid);
+	dp = efi_get_dp_from_boot(efi_lf2_initrd_guid);
 	if (!dp)
 		return EFI_INVALID_PARAMETER;