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Subject[thierryreding:for-5.19/work 141/141] drivers/iommu/of_iommu.c:227:52: warning: variable 'end' set but not used
tree:   https://github.com/thierryreding/linux for-5.19/work
head: a39ec325554470289e8384e30d06a22960d1dd7b
commit: a39ec325554470289e8384e30d06a22960d1dd7b [141/141] WIP
config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20220427/202204270529.C7DsYjUI-lkp@intel.com/config)
compiler: mips-linux-gcc (GCC) 11.3.0
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://github.com/thierryreding/linux/commit/a39ec325554470289e8384e30d06a22960d1dd7b
git remote add thierryreding https://github.com/thierryreding/linux
git fetch --no-tags thierryreding for-5.19/work
git checkout a39ec325554470289e8384e30d06a22960d1dd7b
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/

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

All warnings (new ones prefixed by >>):

drivers/iommu/of_iommu.c: In function 'of_iommu_get_resv_regions':
>> drivers/iommu/of_iommu.c:227:52: warning: variable 'end' set but not used [-Wunused-but-set-variable]
227 | phys_addr_t start, end;
| ^~~


vim +/end +227 drivers/iommu/of_iommu.c

178
179 /**
180 * of_iommu_get_resv_regions - reserved region driver helper for device tree
181 * @dev: device for which to get reserved regions
182 * @list: reserved region list
183 *
184 * IOMMU drivers can use this to implement their .get_resv_regions() callback
185 * for memory regions attached to a device tree node. See the reserved-memory
186 * device tree bindings on how to use these:
187 *
188 * Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
189 */
190 void of_iommu_get_resv_regions(struct device *dev, struct list_head *list)
191 {
192 #if IS_ENABLED(CONFIG_OF_ADDRESS)
193 struct of_phandle_iterator it;
194 int err;
195
196 of_for_each_phandle(&it, err, dev->of_node, "memory-region", NULL, 0) {
197 struct iommu_resv_region *region;
198 struct resource res;
199 const __be32 *maps;
200 int size;
201
202 memset(&res, 0, sizeof(res));
203
204 /*
205 * The "reg" property is optional and can be omitted by reserved-memory regions
206 * that represent reservations in the IOVA space, which are regions that should
207 * not be mapped.
208 */
209 if (of_find_property(it.node, "reg", NULL)) {
210 err = of_address_to_resource(it.node, 0, &res);
211 if (err < 0) {
212 dev_err(dev, "failed to parse memory region %pOF: %d\n",
213 it.node, err);
214 continue;
215 }
216 }
217
218 maps = of_get_property(it.node, "iommu-addresses", &size);
219 if (maps) {
220 const __be32 *end = maps + size / sizeof(__be32);
221 struct device_node *np;
222 unsigned int index = 0;
223 u32 phandle;
224 int na, ns;
225
226 while (maps < end) {
> 227 phys_addr_t start, end;

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

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