Hi Hridya, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.11-rc5] [cannot apply to next-20210125] [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] url: https://github.com/0day-ci/linux/commits/Hridya-Valsaraju/dmabuf-Add-the-capability-to-expose-DMA-BUF-stats-in-sysfs/20210120-172216 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 45dfb8a5659ad286c28fa59008271dbc4e5e3f2d config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/1ce52d5b375d9055a8ca6a7d78f7f1c256680190 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hridya-Valsaraju/dmabuf-Add-the-capability-to-expose-DMA-BUF-stats-in-sysfs/20210120-172216 git checkout 1ce52d5b375d9055a8ca6a7d78f7f1c256680190 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/dma-buf/dma-buf-sysfs-stats.c:144:6: warning: no previous prototype for 'dma_buf_attach_stats_teardown' [-Wmissing-prototypes] 144 | void dma_buf_attach_stats_teardown(struct dma_buf_attachment *attach) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/dma-buf/dma-buf-sysfs-stats.c:158:5: warning: no previous prototype for 'dma_buf_attach_stats_setup' [-Wmissing-prototypes] 158 | int dma_buf_attach_stats_setup(struct dma_buf_attachment *attach, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/dma-buf/dma-buf-sysfs-stats.c:199:6: warning: no previous prototype for 'dma_buf_stats_teardown' [-Wmissing-prototypes] 199 | void dma_buf_stats_teardown(struct dma_buf *dmabuf) | ^~~~~~~~~~~~~~~~~~~~~~ >> drivers/dma-buf/dma-buf-sysfs-stats.c:214:5: warning: no previous prototype for 'dma_buf_init_sysfs_statistics' [-Wmissing-prototypes] 214 | int dma_buf_init_sysfs_statistics(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/dma-buf/dma-buf-sysfs-stats.c:230:6: warning: no previous prototype for 'dma_buf_uninit_sysfs_statistics' [-Wmissing-prototypes] 230 | void dma_buf_uninit_sysfs_statistics(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/dma-buf/dma-buf-sysfs-stats.c:236:5: warning: no previous prototype for 'dma_buf_stats_setup' [-Wmissing-prototypes] 236 | int dma_buf_stats_setup(struct dma_buf *dmabuf) | ^~~~~~~~~~~~~~~~~~~ vim +/dma_buf_attach_stats_teardown +144 drivers/dma-buf/dma-buf-sysfs-stats.c 143 > 144 void dma_buf_attach_stats_teardown(struct dma_buf_attachment *attach) 145 { 146 struct dma_buf_attach_sysfs_entry *sysfs_entry; 147 148 sysfs_entry = attach->sysfs_entry; 149 if (!sysfs_entry) 150 return; 151 152 sysfs_delete_link(&sysfs_entry->kobj, &attach->dev->kobj, "device"); 153 154 kobject_del(&sysfs_entry->kobj); 155 kobject_put(&sysfs_entry->kobj); 156 } 157 > 158 int dma_buf_attach_stats_setup(struct dma_buf_attachment *attach, 159 unsigned int uid) 160 { 161 struct dma_buf_attach_sysfs_entry *sysfs_entry; 162 int ret; 163 struct dma_buf *dmabuf; 164 165 if (!attach) 166 return -EINVAL; 167 168 dmabuf = attach->dmabuf; 169 170 sysfs_entry = kzalloc(sizeof(struct dma_buf_attach_sysfs_entry), 171 GFP_KERNEL); 172 if (!sysfs_entry) 173 return -ENOMEM; 174 175 sysfs_entry->kobj.kset = dmabuf->sysfs_entry->attach_stats_kset; 176 177 attach->sysfs_entry = sysfs_entry; 178 179 ret = kobject_init_and_add(&sysfs_entry->kobj, &dma_buf_attach_ktype, 180 NULL, "%u", uid); 181 if (ret) 182 goto kobj_err; 183 184 ret = sysfs_create_link(&sysfs_entry->kobj, &attach->dev->kobj, 185 "device"); 186 if (ret) 187 goto link_err; 188 189 return 0; 190 191 link_err: 192 kobject_del(&sysfs_entry->kobj); 193 kobj_err: 194 kobject_put(&sysfs_entry->kobj); 195 attach->sysfs_entry = NULL; 196 197 return ret; 198 } > 199 void dma_buf_stats_teardown(struct dma_buf *dmabuf) 200 { 201 struct dma_buf_sysfs_entry *sysfs_entry; 202 203 sysfs_entry = dmabuf->sysfs_entry; 204 if (!sysfs_entry) 205 return; 206 207 kset_unregister(sysfs_entry->attach_stats_kset); 208 kobject_del(&sysfs_entry->kobj); 209 kobject_put(&sysfs_entry->kobj); 210 } 211 212 static struct kset *dma_buf_stats_kset; 213 static struct kset *dma_buf_per_buffer_stats_kset; > 214 int dma_buf_init_sysfs_statistics(void) 215 { 216 dma_buf_stats_kset = kset_create_and_add("dmabuf", NULL, kernel_kobj); 217 if (!dma_buf_stats_kset) 218 return -ENOMEM; 219 220 dma_buf_per_buffer_stats_kset = kset_create_and_add("buffers", NULL, 221 &dma_buf_stats_kset->kobj); 222 if (!dma_buf_per_buffer_stats_kset) { 223 kset_unregister(dma_buf_stats_kset); 224 return -ENOMEM; 225 } 226 227 return 0; 228 } 229 > 230 void dma_buf_uninit_sysfs_statistics(void) 231 { 232 kset_unregister(dma_buf_per_buffer_stats_kset); 233 kset_unregister(dma_buf_stats_kset); 234 } 235 > 236 int dma_buf_stats_setup(struct dma_buf *dmabuf) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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