[hare-scsi-devel:tls-upcall.v2 51/67] include/net/tls.h:363:1: error: unknown type name 'key_ref_t'; did you mean 'key_ref_put'?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git tls-upcall.v2
head:   ac729ea3c52bda460616c71d5f5fc47b2e64da6d
commit: 5cfffd00ff4be23f0447069eb31ce2301a83d974 [51/67] net/tls: Add tls_key_lookup() and tls_key_refresh()
config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220224/202202240430.qhweZYwe-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git/commit/?id=5cfffd00ff4be23f0447069eb31ce2301a83d974
        git remote add hare-scsi-devel https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git
        git fetch --no-tags hare-scsi-devel tls-upcall.v2
        git checkout 5cfffd00ff4be23f0447069eb31ce2301a83d974
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   In file included from net/core/filter.c:79:
>> include/net/tls.h:363:1: error: unknown type name 'key_ref_t'; did you mean 'key_ref_put'?
     363 | key_ref_t tls_key_refresh(char *identity, u8 *data, size_t data_len);
         | ^~~~~~~~~
         | key_ref_put
   include/net/tls.h:364:1: error: unknown type name 'key_ref_t'; did you mean 'key_ref_put'?
     364 | key_ref_t tls_key_lookup(char *identity);
         | ^~~~~~~~~
         | key_ref_put


vim +363 include/net/tls.h

   362	
 > 363	key_ref_t tls_key_refresh(char *identity, u8 *data, size_t data_len);
   364	key_ref_t tls_key_lookup(char *identity);
   365	

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