tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 291009f656e8eaebbdfd3a8d99f6b190a9ce9deb commit: 4bfc848e0981fcd35db00fe1c6581560689f6dc7 m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM date: 8 weeks ago config: m68k-randconfig-r035-20210209 (attached as .config) compiler: m68k-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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 4bfc848e0981fcd35db00fe1c6581560689f6dc7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/init.h:5, from include/linux/io.h:10, from drivers/media/common/videobuf2/videobuf2-vmalloc.c:13: include/linux/scatterlist.h: In function 'sg_set_buf': arch/m68k/include/asm/page_no.h:33:50: warning: ordered comparison of pointer with null pointer [-Wextra] 33 | #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ | ^~ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' 78 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/scatterlist.h:143:2: note: in expansion of macro 'BUG_ON' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~ include/linux/scatterlist.h:143:10: note: in expansion of macro 'virt_addr_valid' 143 | BUG_ON(!virt_addr_valid(buf)); | ^~~~~~~~~~~~~~~ drivers/media/common/videobuf2/videobuf2-vmalloc.c: In function 'vb2_vmalloc_get_userptr': 108 | ioremap(__pfn_to_phys(nums[0]), size + offset); | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/__pfn_to_phys +108 drivers/media/common/videobuf2/videobuf2-vmalloc.c 3c18ff06d811f7 drivers/media/video/videobuf2-vmalloc.c Pawel Osciak 2010-10-11 73 36c0f8b32c4bd4 drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-04-15 74 static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr, cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2014-11-18 75 unsigned long size, cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2014-11-18 76 enum dma_data_direction dma_dir) 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 77 { 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 78 struct vb2_vmalloc_buf *buf; 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 79 struct frame_vector *vec; 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 80 int n_pages, offset, i; 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 81 int ret = -ENOMEM; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 82 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 83 buf = kzalloc(sizeof(*buf), GFP_KERNEL); 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 84 if (!buf) 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 85 return ERR_PTR(-ENOMEM); 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 86 cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2014-11-18 87 buf->dma_dir = dma_dir; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 88 offset = vaddr & ~PAGE_MASK; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 89 buf->size = size; 707947247e9517 drivers/media/common/videobuf2/videobuf2-vmalloc.c Hans Verkuil 2019-04-04 90 vec = vb2_create_framevec(vaddr, size); 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 91 if (IS_ERR(vec)) { 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 92 ret = PTR_ERR(vec); 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 93 goto fail_pfnvec_create; 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 94 } 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 95 buf->vec = vec; 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 96 n_pages = frame_vector_count(vec); 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 97 if (frame_vector_to_pages(vec) < 0) { 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 98 unsigned long *nums = frame_vector_pfns(vec); 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 99 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 100 /* 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 101 * We cannot get page pointers for these pfns. Check memory is 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 102 * physically contiguous and use direct mapping. 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 103 */ 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 104 for (i = 1; i < n_pages; i++) 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 105 if (nums[i-1] + 1 != nums[i]) 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 106 goto fail_map; 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 107 buf->vaddr = (__force void *) 4bdc0d676a6431 drivers/media/common/videobuf2/videobuf2-vmalloc.c Christoph Hellwig 2020-01-06 @108 ioremap(__pfn_to_phys(nums[0]), size + offset); 570d2a48b70094 drivers/media/video/videobuf2-vmalloc.c Javier Martin 2012-02-16 109 } else { d4efd79a81abc7 drivers/media/common/videobuf2/videobuf2-vmalloc.c Christoph Hellwig 2020-06-01 110 buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1); 570d2a48b70094 drivers/media/video/videobuf2-vmalloc.c Javier Martin 2012-02-16 111 } 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 112 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 113 if (!buf->vaddr) 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 114 goto fail_map; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 115 buf->vaddr += offset; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 116 return buf; 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 117 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 118 fail_map: 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 119 vb2_destroy_framevec(vec); 5a9e4dec393a2c drivers/media/v4l2-core/videobuf2-vmalloc.c Jan Kara 2015-07-13 120 fail_pfnvec_create: 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 121 kfree(buf); 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 122 0ff657b0f6120c drivers/media/v4l2-core/videobuf2-vmalloc.c Hans Verkuil 2016-07-21 123 return ERR_PTR(ret); 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 124 } 4419b8aca8dc13 drivers/media/video/videobuf2-vmalloc.c Andrzej Pietrasiewicz 2011-10-13 125 :::::: The code at line 108 was first introduced by commit :::::: 4bdc0d676a643140bdf17dbf7eafedee3d496a3c remove ioremap_nocache and devm_ioremap_nocache :::::: TO: Christoph Hellwig <hch(a)lst.de&gt; :::::: CC: Christoph Hellwig <hch(a)lst.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org