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SubjectRe: [PATCH V2 2/2] LoongArch: Remove ARCH_HAS_PHYS_TO_DMA
Hi Jianmin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on linus/master v5.19 next-20220804]
[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/Jianmin-Lv/DMA-update-acpi_dma_get_range-to-return-dma-map-regions/20220805-153307
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: loongarch-randconfig-r011-20220805 (https://download.01.org/0day-ci/archive/20220806/202208060021.6kjospL6-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/30f8fbc6b485f30e8533a7848a4ad9a2e1351be8
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Jianmin-Lv/DMA-update-acpi_dma_get_range-to-return-dma-map-regions/20220805-153307
git checkout 30f8fbc6b485f30e8533a7848a4ad9a2e1351be8
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash arch/loongarch/kernel/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/loongarch/kernel/dma.c:8:6: warning: no previous prototype for 'acpi_arch_dma_setup' [-Wmissing-prototypes]
8 | void acpi_arch_dma_setup(struct device *dev)
| ^~~~~~~~~~~~~~~~~~~


vim +/acpi_arch_dma_setup +8 arch/loongarch/kernel/dma.c

7
> 8 void acpi_arch_dma_setup(struct device *dev)
9 {
10 int ret;
11 const struct bus_dma_region *map = NULL;
12
13 ret = acpi_dma_get_range(dev, &map);
14 if (!ret) {
15 const struct bus_dma_region *r = map;
16 u64 mask, dma_start, dma_end = 0;
17
18 /* determine the overall bounds of all dma regions */
19 for (dma_start = U64_MAX; r->size; r++) {
20
21 /* Take lower and upper limits */
22 if (r->dma_start < dma_start)
23 dma_start = r->dma_start;
24 if (r->dma_start + r->size - 1 > dma_end)
25 dma_end = r->dma_start + r->size - 1;
26 }
27
28 if (dma_start >= dma_end) {
29 dev_dbg(dev, "Invalid DMA regions configuration\n");
30 return;
31 }
32
33 mask = DMA_BIT_MASK(ilog2(dma_end) + 1);
34 dev->bus_dma_limit = dma_end;
35 dev->dma_range_map = map;
36 dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask);
37 *dev->dma_mask = min(*dev->dma_mask, mask);
38 }
39

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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