tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: 0bb9efd4883938dec34f710bce07ec3ecf5a04bd commit: d738472f4834780c8f85e0eb7c76562bf5484276 [2974/2974] fuse: support fastpath via fast_ipc config: arm64-randconfig-001-20250620 (https://download.01.org/0day-ci/archive/20250620/202506200216.30IOXkDh-lkp@i...) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250620/202506200216.30IOXkDh-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202506200216.30IOXkDh-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from fs/fuse/fuse_i.h:23, from fs/fuse/dev.c:9: include/linux/backing-dev.h:430:49: warning: 'struct cgroup_subsys' declared inside parameter list will not be visible outside of this definition or declaration 430 | static inline void bind_memcg_blkcg_link(struct cgroup_subsys *ss, | ^~~~~~~~~~~~~

...

fs/fuse/dev.c:288:5: warning: no previous prototype for 'fuse_get_unique_from_fc' [-Wmissing-prototypes] 288 | u64 fuse_get_unique_from_fc(struct fuse_conn *fc) | ^~~~~~~~~~~~~~~~~~~~~~~ fs/fuse/dev.c:318:9: warning: no previous prototype for 'fuse_simple_request_fast' [-Wmissing-prototypes] 318 | ssize_t fuse_simple_request_fast(struct fuse_mount *fm, struct fuse_args *args) | ^~~~~~~~~~~~~~~~~~~~~~~~ fs/fuse/dev.c: In function 'fuse_read_copy': fs/fuse/dev.c:2627:6: warning: variable 'err' set but not used [-Wunused-but-set-variable] 2627 | int err = 0; | ^~~ -- In file included from fs/fuse/fuse_i.h:23, from fs/fuse/file.c:9: include/linux/backing-dev.h:430:49: warning: 'struct cgroup_subsys' declared inside parameter list will not be visible outside of this definition or declaration 430 | static inline void bind_memcg_blkcg_link(struct cgroup_subsys *ss, | ^~~~~~~~~~~~~ fs/fuse/file.c:1542:9: warning: no previous prototype for 'fuse_direct_io_fast' [-Wmissing-prototypes] 1542 | ssize_t fuse_direct_io_fast(struct kiocb *iocb, struct iov_iter *iter, | ^~~~~~~~~~~~~~~~~~~ fs/fuse/file.c: In function 'fuse_direct_read_iter': fs/fuse/file.c:1797:3: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement] 1797 | struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb); | ^~~~~~

Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for CPPC_CPUFREQ_SYSFS_INTERFACE Depends on [n]: CPU_FREQ [=y] && (ARM || ARM64 [=y]) && ACPI_CPPC_CPUFREQ [=n] Selected by [m]: - CPU_FREQ_GOV_SEEP [=m] && CPU_FREQ [=y] && (ACPI_CPPC_CPUFREQ [=n] || ARM64 [=y]) vim +/fuse_get_unique_from_fc +288 fs/fuse/dev.c 287

288 u64 fuse_get_unique_from_fc(struct fuse_conn *fc) 289 { 290 fc->reqctr += FUSE_REQ_ID_STEP; 291 return fc->reqctr; 292 } 293 294 static void __fuse_ipc_send(struct fuse_req *req, struct task_struct *tsk, 295 struct fuse_ipc_info *ipc_info) 296 { 297 ssize_t ret; 298 299 FUSE_DEBUG("[cpu/%d][%s/%d] fuse ipc send begin: unique: %d,opcode: %d\n", 300 smp_processor_id(), current->comm, current->pid, 301 req->in.h.unique, req->in.h.opcode); 302 ret = fast_ipc_do_call(ipc_info->bind_info, tsk); 303 304 FUSE_DEBUG("[cpu/%d][%s/%d] end\n", smp_processor_id(), current->comm, 305 current->pid); 306 307 if (ret) { 308 pr_warn("[cpu/%d][%s/%d] fuse_simple_request send failed: ", 309 smp_processor_id(), current->comm, current->pid); 310 pr_warn("unique: %lld, opcode: %d, return value: %ld\n", 311 req->in.h.unique, req->in.h.opcode, ret); 312 req->out.h.error = ret; 313 } 314 } 315 316 static void fuse_adjust_compat(struct fuse_conn *fc, struct fuse_args *args); 317 318 ssize_t fuse_simple_request_fast(struct fuse_mount *fm, struct fuse_args *args) 319 { 320 struct fuse_conn *fc = fm->fc; 321 struct fuse_req *req; 322 ssize_t ret; 323 struct fuse_ipc_info *ipc_info; 324 cpumask_t old_mask; 325 cpumask_t new_mask; 326 327 ipc_info = this_cpu_ptr(fc->percpu_ipc_info); 328 329 old_mask = current->cpus_mask; 330 cpumask_clear(&new_mask); 331 cpumask_set_cpu(raw_smp_processor_id(), &new_mask); 332 set_cpus_allowed_ptr(current, &new_mask); 333 334 mutex_lock(&ipc_info->mutex_lock); 335 336 req = fuse_get_req_sync(fm, ipc_info, args); 337 if (IS_ERR(req)) { 338 mutex_unlock(&ipc_info->mutex_lock); 339 return PTR_ERR(req); 340 } 341 342 /* Needs to be done after fuse_get_req() so that fc->minor is valid */ 343 fuse_adjust_compat(fc, args); 344 345 req->in.h.opcode = args->opcode; 346 req->in.h.nodeid = args->nodeid; 347 req->args = args; 348 req->in.h.unique = fuse_get_unique_from_fc(req->fm->fc); 349 req->in.h.len = sizeof(struct fuse_in_header) + 350 fuse_len_args(req->args->in_numargs, 351 (struct fuse_arg *) req->args->in_args); 352 353 if (!args->noreply) 354 __set_bit(FR_ISREPLY, &req->flags); 355 356 __fuse_ipc_send(req, current, ipc_info); 357 358 set_cpus_allowed_ptr(current, &old_mask); 359 ret = req->out.h.error; 360 if (!ret && args->out_argvar) { 361 WARN_ON(args->out_numargs == 0); 362 ret = args->out_args[args->out_numargs - 1].size; 363 } 364 fuse_drop_waiting(fc); 365 366 mutex_unlock(&ipc_info->mutex_lock); 367 368 return ret; 369 } 370

-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki