(.text+0x688cc): undefined reference to `pkey_hash_algo'

Hi David,

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-modsign.git modsign-post-KS
head:   2f07589773efc8830ddaa63db8c68adf924ffc1d
commit: d20161675cb62a9a34f63e2b2c035835992604b4 [23/26] MODSIGN: Provide Kconfig options
config: x86_64-allmodconfig

[error]
(.text+0x688cc): undefined reference to pkey_hash_algo' (.text+0x8521): undefined reference to public_key_destroy' (.text+0x8610): undefined reference to asn1_ber_decoder' (.text+0x869d): undefined reference to look_up_OID' (.text+0x86bf): undefined reference to sprint_oid' x509_public_key.c:(.text+0x8e53): undefined reference to public_key_subtype'

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0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu <[email protected]> Intel Corporation