[isilence:zc/rx-v4 900/922] net/core/page_pool.c:1129:10: error: incompatible pointer to integer conversion returning 'void *' from a function with result type 'netmem_ref' (aka 'unsigned long')

[isilence:zc/rx-v4 900/922] net/core/page_pool.c:1129:10: error: incompatible pointer to integer conversion returning 'void *' from a function with result type 'netmem_ref' (aka 'unsigned long')

[kernel test robot]

tree:   https://github.com/isilence/linux zc/rx-v4
head:   c13f97bb45f13d99fc22c4452f9926dd4a53d6ce
commit: efbfe3177536b21b6ad8117b9f90bd0f46634d98 [900/922] memory-provider: dmabuf devmem memory provider
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240229/202402292053.nlU6W7MK-lkp@intel.com/config)
compiler: 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/20240229/202402292053.nlU6W7MK-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/202402292053.nlU6W7MK-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/core/page_pool.c:1129:10: error: incompatible pointer to integer conversion returning 'void *' from a function with result type 'netmem_ref' (aka 'unsigned long') [-Wint-conversion]
    1129 |                 return NULL;
         |                        ^~~~
   include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
   net/core/page_pool.c:1146:9: error: incompatible pointer to integer conversion returning 'void *' from a function with result type 'netmem_ref' (aka 'unsigned long') [-Wint-conversion]
    1146 |         return NULL;
         |                ^~~~
   include/linux/stddef.h:8:14: note: expanded from macro 'NULL'
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
   2 errors generated.


vim +1129 net/core/page_pool.c

  1118	
  1119	static netmem_ref mp_dmabuf_devmem_alloc_pages(struct page_pool *pool,
  1120						       gfp_t gfp)
  1121	{
  1122		struct netdev_dmabuf_binding *binding = pool->mp_priv;
  1123		netmem_ref netmem;
  1124		struct net_iov *niov;
  1125		dma_addr_t dma_addr;
  1126	
  1127		niov = netdev_alloc_dmabuf(binding);
  1128		if (!niov)
> 1129			return NULL;
  1130	
  1131		dma_addr = net_iov_dma_addr(niov);
  1132	
  1133		netmem = net_iov_to_netmem(niov);
  1134	
  1135		page_pool_set_pp_info(pool, netmem);
  1136	
  1137		if (page_pool_set_dma_addr_netmem(netmem, dma_addr))
  1138			goto err_free;
  1139	
  1140		pool->pages_state_hold_cnt++;
  1141		trace_page_pool_state_hold(pool, netmem, pool->pages_state_hold_cnt);
  1142		return netmem;
  1143	
  1144	err_free:
  1145		netdev_free_dmabuf(niov);
  1146		return NULL;
  1147	}
  1148	

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