drivers/accel/amdxdna/amdxdna_mailbox.c:203:9: error: implicit declaration of function 'kfree'

drivers/accel/amdxdna/amdxdna_mailbox.c:203:9: error: implicit declaration of function 'kfree'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6452feaf29a6a1cc1c904520c4b1b4cd90133fac
commit: b87f920b934426a24d54613f12ed67c03ae05024 accel/amdxdna: Support hardware mailbox
date:   3 months ago
config: x86_64-buildonly-randconfig-002-20250216 (https://download.01.org/0day-ci/archive/20250216/202502160209.WZSMNh1N-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250216/202502160209.WZSMNh1N-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/202502160209.WZSMNh1N-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'mailbox_release_msg':
>> drivers/accel/amdxdna/amdxdna_mailbox.c:203:9: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]
     203 |         kfree(mb_msg);
         |         ^~~~~
   drivers/accel/amdxdna/amdxdna_mailbox.c: At top level:
   drivers/accel/amdxdna/amdxdna_mailbox.c:357:8: error: unknown type name 'irqreturn_t'
     357 | static irqreturn_t mailbox_irq_handler(int irq, void *p)
         |        ^~~~~~~~~~~
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'mailbox_irq_handler':
   drivers/accel/amdxdna/amdxdna_mailbox.c:367:16: error: 'IRQ_HANDLED' undeclared (first use in this function)
     367 |         return IRQ_HANDLED;
         |                ^~~~~~~~~~~
   drivers/accel/amdxdna/amdxdna_mailbox.c:367:16: note: each undeclared identifier is reported only once for each function it appears in
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'mailbox_rx_worker':
   drivers/accel/amdxdna/amdxdna_mailbox.c:395:25: error: implicit declaration of function 'disable_irq'; did you mean 'disable_work'? [-Werror=implicit-function-declaration]
     395 |                         disable_irq(mb_chann->msix_irq);
         |                         ^~~~~~~~~~~
         |                         disable_work
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'xdna_mailbox_send_msg':
>> drivers/accel/amdxdna/amdxdna_mailbox.c:431:18: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration]
     431 |         mb_msg = kzalloc(sizeof(*mb_msg) + pkg_size, GFP_KERNEL);
         |                  ^~~~~~~
>> drivers/accel/amdxdna/amdxdna_mailbox.c:431:16: warning: assignment to 'struct mailbox_msg *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     431 |         mb_msg = kzalloc(sizeof(*mb_msg) + pkg_size, GFP_KERNEL);
         |                ^
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'xdna_mailbox_create_channel':
>> drivers/accel/amdxdna/amdxdna_mailbox.c:490:18: warning: assignment to 'struct mailbox_channel *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     490 |         mb_chann = kzalloc(sizeof(*mb_chann), GFP_KERNEL);
         |                  ^
   drivers/accel/amdxdna/amdxdna_mailbox.c:513:15: error: implicit declaration of function 'request_irq'; did you mean 'request_region'? [-Werror=implicit-function-declaration]
     513 |         ret = request_irq(mb_irq, mailbox_irq_handler, 0, MAILBOX_NAME, mb_chann);
         |               ^~~~~~~~~~~
         |               request_region
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'xdna_mailbox_destroy_channel':
   drivers/accel/amdxdna/amdxdna_mailbox.c:537:9: error: implicit declaration of function 'free_irq' [-Werror=implicit-function-declaration]
     537 |         free_irq(mb_chann->msix_irq, mb_chann);
         |         ^~~~~~~~
   drivers/accel/amdxdna/amdxdna_mailbox.c: In function 'mailbox_irq_handler':
   drivers/accel/amdxdna/amdxdna_mailbox.c:368:1: warning: control reaches end of non-void function [-Wreturn-type]
     368 | }
         | ^
   cc1: some warnings being treated as errors


vim +/kfree +203 drivers/accel/amdxdna/amdxdna_mailbox.c

   194	
   195	static int mailbox_release_msg(int id, void *p, void *data)
   196	{
   197		struct mailbox_channel *mb_chann = data;
   198		struct mailbox_msg *mb_msg = p;
   199	
   200		MB_DBG(mb_chann, "msg_id 0x%x msg opcode 0x%x",
   201		       mb_msg->pkg.header.id, mb_msg->pkg.header.opcode);
   202		mb_msg->notify_cb(mb_msg->handle, NULL, 0);
 > 203		kfree(mb_msg);
   204	
   205		return 0;
   206	}
   207	

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