Hi Paul, kernel test robot noticed the following build warnings: [auto build test WARNING on jic23-iio/togreg] [also build test WARNING on vkoul-dmaengine/next lwn/docs-next linus/master v6.8-rc7 next-20240308] [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/Paul-Cercueil/dmaengine-Add-API-function-dmaengine_prep_peripheral_dma_vec/20240309-010421 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg patch link: https://lore.kernel.org/r/20240308170046.92899-4-paul%40crapouillou.net patch subject: [PATCH v8 3/6] iio: core: Add new DMABUF interface infrastructure config: i386-randconfig-062-20240309 (https://download.01.org/0day-ci/archive/20240310/202403101535.uRqo6AIt-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240310/202403101535.uRqo6AIt-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202403101535.uRqo6AIt-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> drivers/iio/industrialio-buffer.c:1765:40: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *from @@ got int *user_req @@ drivers/iio/industrialio-buffer.c:1765:40: sparse: expected void const [noderef] __user *from drivers/iio/industrialio-buffer.c:1765:40: sparse: got int *user_req >> drivers/iio/industrialio-buffer.c:1988:53: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected int *user_req @@ got void [noderef] __user *_arg @@ drivers/iio/industrialio-buffer.c:1988:53: sparse: expected int *user_req drivers/iio/industrialio-buffer.c:1988:53: sparse: got void [noderef] __user *_arg drivers/iio/industrialio-buffer.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...): include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false vim +1765 drivers/iio/industrialio-buffer.c 1755 1756 static int iio_buffer_detach_dmabuf(struct iio_dev_buffer_pair *ib, 1757 int *user_req, bool nonblock) 1758 { 1759 struct iio_buffer *buffer = ib->buffer; 1760 struct iio_dev *indio_dev = ib->indio_dev; 1761 struct iio_dmabuf_priv *priv; 1762 struct dma_buf *dmabuf; 1763 int dmabuf_fd, ret = -EPERM; 1764 > 1765 if (copy_from_user(&dmabuf_fd, user_req, sizeof(dmabuf_fd))) 1766 return -EFAULT; 1767 1768 dmabuf = dma_buf_get(dmabuf_fd); 1769 if (IS_ERR(dmabuf)) 1770 return PTR_ERR(dmabuf); 1771 1772 mutex_lock(&buffer->dmabufs_mutex); 1773 1774 list_for_each_entry(priv, &buffer->dmabufs, entry) { 1775 if (priv->attach->dev == indio_dev->dev.parent 1776 && priv->attach->dmabuf == dmabuf) { 1777 list_del(&priv->entry); 1778 1779 /* Unref the reference from iio_buffer_attach_dmabuf() */ 1780 iio_buffer_dmabuf_put(priv->attach); 1781 ret = 0; 1782 break; 1783 } 1784 } 1785 1786 mutex_unlock(&buffer->dmabufs_mutex); 1787 dma_buf_put(dmabuf); 1788 1789 return ret; 1790 } 1791 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
