Re: [drm-drm-misc:for-linux-next 2/2] drivers/dma-buf/dma-buf.c:1186: undefined reference to `vma_set_file'

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Am 05.11.20 um 17:04 schrieb Daniel Vetter:
On Thu, Nov 05, 2020 at 05:02:09PM +0100, Daniel Vetter wrote:
On Thu, Nov 05, 2020 at 04:41:00PM +0100, Christian König wrote:
Guys, can anybody help me out. Why is the kernel test robot complaining
here?

Thanks in advance,
Christian.

Am 05.11.20 um 16:26 schrieb kernel test robot:
tree:   git://anongit.freedesktop.org/drm/drm-misc for-linux-next
head:   2b5b95b1ff3d70a95013a45e3b5b90f1daf42348
commit: 2b5b95b1ff3d70a95013a45e3b5b90f1daf42348 [2/2] mm: introduce vma_set_file function v4
config: h8300-randconfig-r031-20201105 (attached as .config)
compiler: h8300-linux-gcc (GCC) 9.3.0
nommu platform?

If you have a hard time finding a cross compiler for this, there's some
nommu arm platforms. I used that for compile teesting nommu support
recently.

If it's not that, then it's something specific with that config for sure.
Also looking a the tree, there's no ack from Andrew Morton. For merging
stuff that's not maintained in drm-misc (and definitely for stuff outside
of drm maintained tree) we need an ack from the right maintainer.

Ok, going to revert from drm-misc-next then.

Thanks,
Christian.


I'd say make sure he's ok before we dig an even deeper hole here.
-Daniel

-Daniel

reproduce (this is a W=1 build):
          wget https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fraw.githubusercontent.com%2Fintel%2Flkp-tests%2Fmaster%2Fsbin%2Fmake.cross&data=04%7C01%7Cchristian.koenig%40amd.com%7C4e238bfcb3c74ec4509b08d881a476b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637401890651814795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=SwbnYEHBsw44Iy1yJdEqUp1BnLY%2BkMFKOuFcVrccisg%3D&reserved=0 -O ~/bin/make.cross
          chmod +x ~/bin/make.cross
          git remote add drm-drm-misc git://anongit.freedesktop.org/drm/drm-misc
          git fetch --no-tags drm-drm-misc for-linux-next
          git checkout 2b5b95b1ff3d70a95013a45e3b5b90f1daf42348
          # save the attached .config to linux build tree
          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300

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

All errors (new ones prefixed by >>):

     h8300-linux-ld: section .init.text LMA [00000000004da400,000000000051ebcb] overlaps section .text LMA [000000000000025c,0000000001069997]
     h8300-linux-ld: section .data VMA [0000000000400000,00000000004da3ff] overlaps section .text VMA [000000000000025c,0000000001069997]
     h8300-linux-ld: drivers/dma-buf/dma-buf.o: in function `dma_buf_mmap':
drivers/dma-buf/dma-buf.c:1186: undefined reference to `vma_set_file'
vim +1186 drivers/dma-buf/dma-buf.c

    1150	
    1151	
    1152	/**
    1153	 * dma_buf_mmap - Setup up a userspace mmap with the given vma
    1154	 * @dmabuf:	[in]	buffer that should back the vma
    1155	 * @vma:	[in]	vma for the mmap
    1156	 * @pgoff:	[in]	offset in pages where this mmap should start within the
    1157	 *			dma-buf buffer.
    1158	 *
    1159	 * This function adjusts the passed in vma so that it points at the file of the
    1160	 * dma_buf operation. It also adjusts the starting pgoff and does bounds
    1161	 * checking on the size of the vma. Then it calls the exporters mmap function to
    1162	 * set up the mapping.
    1163	 *
    1164	 * Can return negative error values, returns 0 on success.
    1165	 */
    1166	int dma_buf_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma,
    1167			 unsigned long pgoff)
    1168	{
    1169		if (WARN_ON(!dmabuf || !vma))
    1170			return -EINVAL;
    1171	
    1172		/* check if buffer supports mmap */
    1173		if (!dmabuf->ops->mmap)
    1174			return -EINVAL;
    1175	
    1176		/* check for offset overflow */
    1177		if (pgoff + vma_pages(vma) < pgoff)
    1178			return -EOVERFLOW;
    1179	
    1180		/* check for overflowing the buffer's size */
    1181		if (pgoff + vma_pages(vma) >
    1182		    dmabuf->size >> PAGE_SHIFT)
    1183			return -EINVAL;
    1184	
    1185		/* readjust the vma */
1186		vma_set_file(vma, dmabuf->file);
    1187		vma->vm_pgoff = pgoff;
    1188	
    1189		return dmabuf->ops->mmap(dmabuf, vma);
    1190	}
    1191	EXPORT_SYMBOL_GPL(dma_buf_mmap);
    1192	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.01.org%2Fhyperkitty%2Flist%2Fkbuild-all%40lists.01.org&amp;data=04%7C01%7Cchristian.koenig%40amd.com%7C4e238bfcb3c74ec4509b08d881a476b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637401890651814795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=6fC2fICf2s2E86Fcn9OUIesLGIq7M%2FyoYTa6QV0k1c4%3D&amp;reserved=0
--
Daniel Vetter
Software Engineer, Intel Corporation
https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fblog.ffwll.ch%2F&amp;data=04%7C01%7Cchristian.koenig%40amd.com%7C4e238bfcb3c74ec4509b08d881a476b1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637401890651814795%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=9j9iq%2B0Xmi7vq8RxIMWv0B2OaqbKFwvEe0e23QKu%2BuY%3D&amp;reserved=0

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