[drm-xe:drm-xe-next 9/10] drivers/gpu/drm/xe/xe_guc_relay.c:863:52: error: call to undeclared function 'kunit_get_current_test'; ISO C99 and later do not support implicit function declarations

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

tree:   https://gitlab.freedesktop.org/drm/xe/kernel.git drm-xe-next
head:   cca0607b6f6a21bee68c092ed7ad9f3322e54523
commit: 27b717bac93fb9a28f37ba17f3f4aa220fedae21 [9/10] drm/xe/kunit: Add GuC Relay kunit tests
config: x86_64-randconfig-006-20240106 (https://download.01.org/0day-ci/archive/20240107/202401070036.60pNn4uZ-lkp@intel.com/config)
compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240107/202401070036.60pNn4uZ-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/202401070036.60pNn4uZ-lkp@intel.com/

Note: the drm-xe/drm-xe-next HEAD cca0607b6f6a21bee68c092ed7ad9f3322e54523 builds fine.
      It only hurts bisectability.

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/xe/xe_guc_relay.c:863:52: error: call to undeclared function 'kunit_get_current_test'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     863 |         if (unlikely(!IS_SRIOV_VF(relay_to_xe(relay)) && !kunit_get_current_test()))
         |                                                           ^
   drivers/gpu/drm/xe/xe_guc_relay.c:909:52: error: call to undeclared function 'kunit_get_current_test'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     909 |         if (unlikely(!IS_SRIOV_PF(relay_to_xe(relay)) && !kunit_get_current_test()))
         |                                                           ^
   2 errors generated.


vim +/kunit_get_current_test +863 drivers/gpu/drm/xe/xe_guc_relay.c

   840	
   841	/**
   842	 * xe_guc_relay_process_guc2vf - Handle relay notification message from the GuC.
   843	 * @relay: the &xe_guc_relay which will handle the message
   844	 * @msg: message to be handled
   845	 * @len: length of the message (in dwords)
   846	 *
   847	 * This function will handle relay messages received from the GuC.
   848	 *
   849	 * This function is can only be used if driver is running in SR-IOV mode.
   850	 *
   851	 * Return: 0 on success or a negative error code on failure.
   852	 */
   853	int xe_guc_relay_process_guc2vf(struct xe_guc_relay *relay, const u32 *msg, u32 len)
   854	{
   855		u32 rid;
   856	
   857		relay_assert(relay, len >= GUC_HXG_MSG_MIN_LEN);
   858		relay_assert(relay, FIELD_GET(GUC_HXG_MSG_0_ORIGIN, msg[0]) == GUC_HXG_ORIGIN_GUC);
   859		relay_assert(relay, FIELD_GET(GUC_HXG_MSG_0_TYPE, msg[0]) == GUC_HXG_TYPE_EVENT);
   860		relay_assert(relay, FIELD_GET(GUC_HXG_EVENT_MSG_0_ACTION, msg[0]) ==
   861			     XE_GUC_ACTION_GUC2VF_RELAY_FROM_PF);
   862	
 > 863		if (unlikely(!IS_SRIOV_VF(relay_to_xe(relay)) && !kunit_get_current_test()))
   864			return -EPERM;
   865	
   866		if (unlikely(!relay_is_ready(relay)))
   867			return -ENODEV;
   868	
   869		if (unlikely(len < GUC2VF_RELAY_FROM_PF_EVENT_MSG_MIN_LEN))
   870			return -EPROTO;
   871	
   872		if (unlikely(len > GUC2VF_RELAY_FROM_PF_EVENT_MSG_MAX_LEN))
   873			return -EMSGSIZE;
   874	
   875		if (unlikely(FIELD_GET(GUC_HXG_EVENT_MSG_0_DATA0, msg[0])))
   876			return -EPFNOSUPPORT;
   877	
   878		rid = FIELD_GET(GUC2VF_RELAY_FROM_PF_EVENT_MSG_1_RELAY_ID, msg[1]);
   879	
   880		return relay_process_msg(relay, PFID, rid,
   881					 msg + GUC2VF_RELAY_FROM_PF_EVENT_MSG_MIN_LEN,
   882					 len - GUC2VF_RELAY_FROM_PF_EVENT_MSG_MIN_LEN);
   883	}
   884	

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