build: disable character output display during the kernel compilation
the output is as follows printing by openssl: CERT certs/x509_certificate_list GENKEY certs/signing_key.pem .....+................+...+.....+++++++++++++++++++++++++++++++++ ..+....+.....+......+....+..+....+....................+............ CC arch/riscv/kernel/probes/decode-insn.o ...+..........+..........................+.......+............... ..++++ CC fs/notify/inotify/inotify_fsnotify.o +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ .....+....+++++++++++++++++++++++++++++++++++++++++++++++++++++++ Change-Id: Ia9ffa6b451f0e1612b50872a0fc1010fdc5eff6c
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@@ -47,7 +47,7 @@ keytype-$(CONFIG_MODULE_SIG_KEY_TYPE_ECDSA) := -newkey ec -pkeyopt ec_paramgen_c
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quiet_cmd_gen_key = GENKEY $@
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quiet_cmd_gen_key = GENKEY $@
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cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
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cmd_gen_key = openssl req -new -nodes -utf8 -$(CONFIG_MODULE_SIG_HASH) -days 36500 \
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-batch -x509 -config $< \
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-batch -x509 -config $< \
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-outform PEM -out $@ -keyout $@ $(keytype-y) 2>&1
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-outform PEM -out $@ -keyout $@ $(keytype-y) 2> /dev/null
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$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
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$(obj)/signing_key.pem: $(obj)/x509.genkey FORCE
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$(call if_changed,gen_key)
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$(call if_changed,gen_key)
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