From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 16 Jun 2020 12:53:30 +0200
Subject: efi/libstub: arm: Omit arch specific config table matching array on
 arm64
Patch-mainline: v5.8-rc3
Git-commit: 62956be8f95b93e9f91ffe2e5aa9c0e411af5a14
References: jsc#SLE-16407

On arm64, the EFI stub is built into the kernel proper, and so the stub
can refer to its symbols directly. Therefore, the practice of using EFI
configuration tables to pass information between them is never needed,
so we can omit any code consuming such tables when building for arm64.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
 drivers/firmware/efi/arm-init.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/firmware/efi/arm-init.c
+++ b/drivers/firmware/efi/arm-init.c
@@ -62,7 +62,8 @@ static void __init init_screen_info(void
 {
 	struct screen_info *si;
 
-	if (screen_info_table != EFI_INVALID_TABLE_ADDR) {
+	if (IS_ENABLED(CONFIG_ARM) &&
+	    screen_info_table != EFI_INVALID_TABLE_ADDR) {
 		si = early_memremap_ro(screen_info_table, sizeof(*si));
 		if (!si) {
 			pr_err("Could not map screen_info config table\n");
@@ -116,7 +117,8 @@ static int __init uefi_init(u64 efi_syst
 		goto out;
 	}
 	retval = efi_config_parse_tables(config_tables, systab->nr_tables,
-					 arch_tables);
+					 IS_ENABLED(CONFIG_ARM) ? arch_tables
+								: NULL);
 
 	early_memunmap(config_tables, table_size);
 out: