From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com, Dan Carpenter <error27@gmail.com>
Subject: arch/s390/kernel/perf_cpum_cf.c:306 cpum_cf_alloc() error: uninitialized symbol 'rc'.
Date: Sun, 10 Dec 2023 21:44:35 +0800 [thread overview]
Message-ID: <202312102155.RbBlpK49-lkp@intel.com> (raw)
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Thomas Richter <tmricht@linux.ibm.com>
CC: Alexander Gordeev <agordeev@linux.ibm.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c527f5606aa545233a4d2c6d5c636ed82b8633ef
commit: 9b9cf3c77e7e090b30657b3d2c288deb58dfb4f2 s390/cpum_cf: rework PER_CPU_DEFINE of struct cpu_cf_events
date: 6 months ago
:::::: branch date: 10 hours ago
:::::: commit date: 6 months ago
config: s390-randconfig-r071-20231115 (https://download.01.org/0day-ci/archive/20231210/202312102155.RbBlpK49-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231210/202312102155.RbBlpK49-lkp@intel.com/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@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202312102155.RbBlpK49-lkp@intel.com/
New smatch warnings:
arch/s390/kernel/perf_cpum_cf.c:306 cpum_cf_alloc() error: uninitialized symbol 'rc'.
Old smatch warnings:
arch/s390/kernel/perf_cpum_cf.c:1505 cfset_all_copy() warn: ignoring unreachable code.
vim +/rc +306 arch/s390/kernel/perf_cpum_cf.c
9b9cf3c77e7e09 Thomas Richter 2023-06-15 275
9b9cf3c77e7e09 Thomas Richter 2023-06-15 276 /*
9b9cf3c77e7e09 Thomas Richter 2023-06-15 277 * Create/delete per CPU data structures for /dev/hwctr interface and events
9b9cf3c77e7e09 Thomas Richter 2023-06-15 278 * created by perf_event_open().
9b9cf3c77e7e09 Thomas Richter 2023-06-15 279 * If cpu is -1, track task on all available CPUs. This requires
9b9cf3c77e7e09 Thomas Richter 2023-06-15 280 * allocation of hardware data structures for all CPUs. This setup handles
9b9cf3c77e7e09 Thomas Richter 2023-06-15 281 * perf_event_open() with task context and /dev/hwctr interface.
9b9cf3c77e7e09 Thomas Richter 2023-06-15 282 * If cpu is non-zero install event on this CPU only. This setup handles
9b9cf3c77e7e09 Thomas Richter 2023-06-15 283 * perf_event_open() with CPU context.
9b9cf3c77e7e09 Thomas Richter 2023-06-15 284 */
9b9cf3c77e7e09 Thomas Richter 2023-06-15 285 static int cpum_cf_alloc(int cpu)
9b9cf3c77e7e09 Thomas Richter 2023-06-15 286 {
9b9cf3c77e7e09 Thomas Richter 2023-06-15 287 cpumask_var_t mask;
9b9cf3c77e7e09 Thomas Richter 2023-06-15 288 int rc;
9b9cf3c77e7e09 Thomas Richter 2023-06-15 289
9b9cf3c77e7e09 Thomas Richter 2023-06-15 290 if (cpu == -1) {
9b9cf3c77e7e09 Thomas Richter 2023-06-15 291 if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
9b9cf3c77e7e09 Thomas Richter 2023-06-15 292 return -ENOMEM;
9b9cf3c77e7e09 Thomas Richter 2023-06-15 293 for_each_online_cpu(cpu) {
9b9cf3c77e7e09 Thomas Richter 2023-06-15 294 rc = cpum_cf_alloc_cpu(cpu);
9b9cf3c77e7e09 Thomas Richter 2023-06-15 295 if (rc) {
9b9cf3c77e7e09 Thomas Richter 2023-06-15 296 for_each_cpu(cpu, mask)
9b9cf3c77e7e09 Thomas Richter 2023-06-15 297 cpum_cf_free_cpu(cpu);
9b9cf3c77e7e09 Thomas Richter 2023-06-15 298 break;
9b9cf3c77e7e09 Thomas Richter 2023-06-15 299 }
9b9cf3c77e7e09 Thomas Richter 2023-06-15 300 cpumask_set_cpu(cpu, mask);
9b9cf3c77e7e09 Thomas Richter 2023-06-15 301 }
9b9cf3c77e7e09 Thomas Richter 2023-06-15 302 free_cpumask_var(mask);
9b9cf3c77e7e09 Thomas Richter 2023-06-15 303 } else {
9b9cf3c77e7e09 Thomas Richter 2023-06-15 304 rc = cpum_cf_alloc_cpu(cpu);
9b9cf3c77e7e09 Thomas Richter 2023-06-15 305 }
9b9cf3c77e7e09 Thomas Richter 2023-06-15 @306 return rc;
9b9cf3c77e7e09 Thomas Richter 2023-06-15 307 }
9b9cf3c77e7e09 Thomas Richter 2023-06-15 308
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2023-12-10 13:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-10 13:44 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-11-15 22:27 arch/s390/kernel/perf_cpum_cf.c:306 cpum_cf_alloc() error: uninitialized symbol 'rc' kernel test robot
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