From c537e4d04eb75274bf03e6a2a8d6ece25d9d16f6 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 14 Dec 2021 11:53:45 +0900
Subject: [PATCH] certs: use $< and $@ to simplify the key generation rule

Do not repeat $(obj)/x509.genkey or $(obj)/signing_key.pem

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
---
 certs/Makefile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/certs/Makefile b/certs/Makefile
index a702b70f3cb9c..aba9e782f9409 100644
--- a/certs/Makefile
+++ b/certs/Makefile
@@ -60,9 +60,8 @@ keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_c
 
 quiet_cmd_gen_key = GENKEY  $@
       cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
-		-batch -x509 -config $(obj)/x509.genkey \
-		-outform PEM -out $(obj)/signing_key.pem \
-		-keyout $(obj)/signing_key.pem $(keytype-y) 2>&1
+		-batch -x509 -config $< \
+		-outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
 
 $(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
 	$(call if_changed,gen_key)
-- 
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