linux-kernel - drivers/vdpa/mlx5/core/mr.c:264:21: error: implicit declaration of function '__phys_to

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Message-ID: <202008200156.KZD2AZRj%lkp@intel.com>
Date:   Thu, 20 Aug 2020 01:41:00 +0800
From:   kernel test robot <lkp@...el.com>
To:     Eli Cohen <eli@...lanox.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Parav Pandit <parav@...lanox.com>
Subject: drivers/vdpa/mlx5/core/mr.c:264:21: error: implicit declaration of
 function '__phys_to_pfn'; did you mean

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   18445bf405cb331117bc98427b1ba6f12418ad17
commit: 94abbccdf2916cb03f9626f2d36c6e9971490c12 vdpa/mlx5: Add shared memory registration code
date:   2 weeks ago
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 94abbccdf2916cb03f9626f2d36c6e9971490c12
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   In file included from arch/ia64/include/asm/ptrace.h:46,
                    from arch/ia64/include/asm/processor.h:20,
                    from arch/ia64/include/asm/thread_info.h:12,
                    from include/linux/thread_info.h:38,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/ia64/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/rcupdate.h:27,
                    from include/linux/rculist.h:11,
                    from include/linux/pid.h:5,
                    from include/linux/sched.h:14,
                    from include/linux/ratelimit.h:6,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from include/linux/vdpa.h:6,
                    from drivers/vdpa/mlx5/core/mr.c:4:
   drivers/vdpa/mlx5/core/mr.c: In function 'map_direct_mr':
>> drivers/vdpa/mlx5/core/mr.c:264:21: error: implicit declaration of function '__phys_to_pfn'; did you mean 'page_to_pfn'? [-Werror=implicit-function-declaration]
     264 |    pg = pfn_to_page(__phys_to_pfn(pa));
         |                     ^~~~~~~~~~~~~
   arch/ia64/include/asm/page.h:108:40: note: in definition of macro 'pfn_to_page'
     108 | # define pfn_to_page(pfn) (vmem_map + (pfn))
         |                                        ^~~
   cc1: some warnings being treated as errors

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=94abbccdf2916cb03f9626f2d36c6e9971490c12
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 94abbccdf2916cb03f9626f2d36c6e9971490c12
vim +264 drivers/vdpa/mlx5/core/mr.c

   225	
   226	static int map_direct_mr(struct mlx5_vdpa_dev *mvdev, struct mlx5_vdpa_direct_mr *mr,
   227				 struct vhost_iotlb *iotlb)
   228	{
   229		struct vhost_iotlb_map *map;
   230		unsigned long lgcd = 0;
   231		int log_entity_size;
   232		unsigned long size;
   233		u64 start = 0;
   234		int err;
   235		struct page *pg;
   236		unsigned int nsg;
   237		int sglen;
   238		u64 pa;
   239		u64 paend;
   240		struct scatterlist *sg;
   241		struct device *dma = mvdev->mdev->device;
   242		int ret;
   243	
   244		for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1);
   245		     map; map = vhost_iotlb_itree_next(map, start, mr->end - 1)) {
   246			size = maplen(map, mr);
   247			lgcd = gcd(lgcd, size);
   248			start += size;
   249		}
   250		log_entity_size = ilog2(lgcd);
   251	
   252		sglen = 1 << log_entity_size;
   253		nsg = MLX5_DIV_ROUND_UP_POW2(mr->end - mr->start, log_entity_size);
   254	
   255		err = sg_alloc_table(&mr->sg_head, nsg, GFP_KERNEL);
   256		if (err)
   257			return err;
   258	
   259		sg = mr->sg_head.sgl;
   260		for (map = vhost_iotlb_itree_first(iotlb, mr->start, mr->end - 1);
   261		     map; map = vhost_iotlb_itree_next(map, mr->start, mr->end - 1)) {
   262			paend = map->addr + maplen(map, mr);
   263			for (pa = map->addr; pa < paend; pa += sglen) {
 > 264				pg = pfn_to_page(__phys_to_pfn(pa));
   265				if (!sg) {
   266					mlx5_vdpa_warn(mvdev, "sg null. start 0x%llx, end 0x%llx\n",
   267						       map->start, map->last + 1);
   268					err = -ENOMEM;
   269					goto err_map;
   270				}
   271				sg_set_page(sg, pg, sglen, 0);
   272				sg = sg_next(sg);
   273				if (!sg)
   274					goto done;
   275			}
   276		}
   277	done:
   278		mr->log_size = log_entity_size;
   279		mr->nsg = nsg;
   280		ret = dma_map_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
   281		if (!ret)
   282			goto err_map;
   283	
   284		err = create_direct_mr(mvdev, mr);
   285		if (err)
   286			goto err_direct;
   287	
   288		return 0;
   289	
   290	err_direct:
   291		dma_unmap_sg_attrs(dma, mr->sg_head.sgl, mr->nsg, DMA_BIDIRECTIONAL, 0);
   292	err_map:
   293		sg_free_table(&mr->sg_head);
   294		return err;
   295	}
   296	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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