Hi Hans, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 329f4152911c276b074bec75a0443f88821afdb7 commit: c1023ba74fc77dc56dc317bd98f5060aab889ac1 [media] drivers/media/platform/Kconfig: fix VIDEO_MEDIATEK_VCODEC dependency date: 5 weeks ago config: m32r-allyesconfig (attached as .config) compiler: m32r-linux-gcc (GCC) 4.9.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout c1023ba74fc77dc56dc317bd98f5060aab889ac1 # save the attached .config to linux build tree make.cross ARCH=m32r All errors (new ones prefixed by >>): drivers/media/v4l2-core/videobuf2-dma-contig.c: In function 'vb2_dc_get_userptr': >> drivers/media/v4l2-core/videobuf2-dma-contig.c:486:2: error: implicit declaration of function 'dma_get_cache_alignment' [-Werror=implicit-function-declaration] unsigned long dma_align = dma_get_cache_alignment(); ^ cc1: some warnings being treated as errors vim +/dma_get_cache_alignment +486 drivers/media/v4l2-core/videobuf2-dma-contig.c 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 470 { 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 471 /* really, we cannot do anything better at this point */ 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 472 return (dma_addr_t)(pfn) << PAGE_SHIFT; 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 473 } 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 474 #endif 774d2301 drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2013-06-19 475 36c0f8b3 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-04-15 476 static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr, cd474037 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 477 unsigned long size, enum dma_data_direction dma_dir) 1a758d4e drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 478 { 1a758d4e drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 479 struct vb2_dc_buf *buf; fb639eb3 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 480 struct frame_vector *vec; e15dab75 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 481 unsigned long offset; fb639eb3 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 482 int n_pages, i; e15dab75 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 483 int ret = 0; e15dab75 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 484 struct sg_table *sgt; e15dab75 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 485 unsigned long contig_size; d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 @486 unsigned long dma_align = dma_get_cache_alignment(); 251a79f8 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 487 DEFINE_DMA_ATTRS(attrs); 251a79f8 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 488 251a79f8 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 489 dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs); d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 490 d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 491 /* Only cache aligned DMA transfers are reliable */ d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 492 if (!IS_ALIGNED(vaddr | size, dma_align)) { d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 493 pr_debug("user data must be aligned to %lu bytes\n", dma_align); d81e870d drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 494 return ERR_PTR(-EINVAL); :::::: The code at line 486 was first introduced by commit :::::: d81e870d5afa1b0a95ea94c4052d3c7e973fae8c [media] v4l: vb2-dma-contig: fail if user ptr buffer is not correctly aligned :::::: TO: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> :::::: CC: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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