[linux-nvme:nvme-6.19 4/21] include/linux/nvme-keyring.h:57:4: warning: no previous prototype for function 'nvme_dhchap_psk_hash'

[kernel test robot <lkp@intel.com>]

tree:   git://git.infradead.org/nvme.git nvme-6.19
head:   453ba3089d4570c2be2e230e1e7a287eac4b306b
commit: 8d9937531a4d3cb6d2d352c46dd807bfa52988b6 [4/21] nvme-keyring: add 'dhchap' key type
config: x86_64-randconfig-121-20251101 (https://download.01.org/0day-ci/archive/20251101/202511011103.e6eXLAln-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251101/202511011103.e6eXLAln-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511011103.e6eXLAln-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/nvme/host/fabrics.c:15:
>> include/linux/nvme-keyring.h:57:4: warning: no previous prototype for function 'nvme_dhchap_psk_hash' [-Wmissing-prototypes]
      57 | u8 nvme_dhchap_psk_hash(struct key *key)
         |    ^
   include/linux/nvme-keyring.h:57:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      57 | u8 nvme_dhchap_psk_hash(struct key *key)
         | ^
         | static 
   1 warning generated.


vim +/nvme_dhchap_psk_hash +57 include/linux/nvme-keyring.h

    26	
    27	#else
    28	static inline struct key *nvme_tls_psk_refresh(struct key *keyring,
    29			u8 *data, size_t data_len, const char *digest)
    30	{
    31		return ERR_PTR(-ENOTSUPP);
    32	}
    33	static inline key_serial_t nvme_tls_psk_default(struct key *keyring,
    34			const char *hostnqn, const char *subnqn)
    35	{
    36		return 0;
    37	}
    38	static inline key_serial_t nvme_keyring_id(void)
    39	{
    40		return 0;
    41	}
    42	static inline struct key *nvme_tls_key_lookup(key_serial_t key_id)
    43	{
    44		return ERR_PTR(-ENOTSUPP);
    45	}
    46	static inline struct key *nvme_dhchap_psk_refresh(struct key *keyring,
    47			const char *hostnqn, const char *subnqn,
    48			u8 *data, size_t data_len)
    49	{
    50		return ERR_PTR(-ENOTSUPP);
    51	}
    52	static inline struct key *nvme_dhchap_psk_lookup(struct key *keyring,
    53			const char *hostnqn, const char *subnqn, u8 hmac)
    54	{
    55		return ERR_PTR(-ENOTSUPP);
    56	}
  > 57	u8 nvme_dhchap_psk_hash(struct key *key)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki