Sorry for the spam, besides that pasting the patch somehow did not work 
(I cannot apply it myself), I had also a typo in David W.'s mail. I hope 
that attaching the patch is fine.



On 3/2/22 21:06, Bernd Schubert wrote:
> From: Bernd Schubert <bschubert@ddn.com>
> 
> Compilation of 5.17-rc7-master was failing with my .config
> (actually taken from Ubuntus 5.17 package)
> 
> certs/system_keyring.o: In function `verify_pkcs7_message_sig':
> linux/certs/system_keyring.c:224:
>      undefined reference to `is_key_on_revocation_list'
> 
> 
> That got fixed by exporting the 'is_key_on_revocation_list' symbol.
> 
> 
> Signed-off-by: Bernd Schubert <bschubert@ddn.com>
> ---
>   certs/blacklist.c |    1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/certs/blacklist.c b/certs/blacklist.c
> index c9a435b15af4..ad39780e5150 100644
> --- a/certs/blacklist.c
> +++ b/certs/blacklist.c
> @@ -192,6 +192,7 @@ int is_key_on_revocation_list(struct pkcs7_message 
> *pkcs7)
> 
>       return -ENOKEY;
>   }
> +EXPORT_SYMBOL_GPL(is_key_on_revocation_list);
>   #endif
> 
>   /*