Re: [RFC PATCH] svcrdma: Introduce Receive buffer arenas

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

Hi Chuck,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on trondmy-nfs/linux-next]
[also build test ERROR on linus/master v6.16 next-20250808]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Chuck-Lever/svcrdma-Introduce-Receive-buffer-arenas/20250809-025410
base:   git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next
patch link:    https://lore.kernel.org/r/20250808184648.120866-1-cel%40kernel.org
patch subject: [RFC PATCH] svcrdma: Introduce Receive buffer arenas
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20250810/202508100416.aCwCI003-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250810/202508100416.aCwCI003-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/202508100416.aCwCI003-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/sunrpc/xprtrdma/svc_rdma_recvfrom.c: In function 'svc_rdma_recv_ctxt_alloc':
>> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:136:40: error: passing argument 4 of 'rpcrdma_pool_alloc_buffer' from incompatible pointer type [-Wincompatible-pointer-types]
     136 |                                        &ctxt->rc_recv_sge.addr))
         |                                        ^~~~~~~~~~~~~~~~~~~~~~~
         |                                        |
         |                                        u64 * {aka long long unsigned int *}
   In file included from net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:107:
   net/sunrpc/xprtrdma/pool.h:23:61: note: expected 'dma_addr_t *' {aka 'unsigned int *'} but argument is of type 'u64 *' {aka 'long long unsigned int *'}
      23 |                                void **cpu_addr, dma_addr_t *dma_addr);
         |                                                 ~~~~~~~~~~~~^~~~~~~~


vim +/rpcrdma_pool_alloc_buffer +136 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

   119	
   120	static struct svc_rdma_recv_ctxt *
   121	svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma)
   122	{
   123		int node = ibdev_to_node(rdma->sc_cm_id->device);
   124		struct svc_rdma_recv_ctxt *ctxt;
   125		unsigned long pages;
   126	
   127		pages = svc_serv_maxpages(rdma->sc_xprt.xpt_server);
   128		ctxt = kzalloc_node(struct_size(ctxt, rc_pages, pages),
   129				    GFP_KERNEL, node);
   130		if (!ctxt)
   131			goto fail0;
   132		ctxt->rc_maxpages = pages;
   133	
   134		if (!rpcrdma_pool_alloc_buffer(rdma->sc_recv_pool, GFP_KERNEL,
   135					       &ctxt->rc_recv_buf,
 > 136					       &ctxt->rc_recv_sge.addr))
   137			goto fail1;
   138	
   139		svc_rdma_recv_cid_init(rdma, &ctxt->rc_cid);
   140		pcl_init(&ctxt->rc_call_pcl);
   141		pcl_init(&ctxt->rc_read_pcl);
   142		pcl_init(&ctxt->rc_write_pcl);
   143		pcl_init(&ctxt->rc_reply_pcl);
   144	
   145		ctxt->rc_recv_wr.next = NULL;
   146		ctxt->rc_recv_wr.wr_cqe = &ctxt->rc_cqe;
   147		ctxt->rc_recv_wr.sg_list = &ctxt->rc_recv_sge;
   148		ctxt->rc_recv_wr.num_sge = 1;
   149		ctxt->rc_cqe.done = svc_rdma_wc_receive;
   150		ctxt->rc_recv_sge.length = rdma->sc_max_req_size;
   151		ctxt->rc_recv_sge.lkey = rdma->sc_pd->local_dma_lkey;
   152		svc_rdma_cc_init(rdma, &ctxt->rc_cc);
   153		return ctxt;
   154	
   155	fail1:
   156		kfree(ctxt);
   157	fail0:
   158		return NULL;
   159	}
   160	

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