tree: https://github.com/kdave/btrfs-devel.git dev/raid-policy head: cdf61a56c20bf9881f8cac47eabe3adea5fc23a9 commit: e3953975b6a7b35788f3141689f2745e8200438d [82/85] btrfs: Add load read policy config: i386-randconfig-m021-20210128 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> New smatch warnings: fs/btrfs/volumes.c:5606 find_live_mirror_load() error: uninitialized symbol 'now'. Old smatch warnings: fs/btrfs/volumes.c:1235 open_fs_devices() error: we previously assumed 'latest_dev' could be null (see line 1223) vim +/now +5606 fs/btrfs/volumes.c e3953975b6a7b3 Michal Rostecki 2021-01-22 5573 static int find_live_mirror_load(struct btrfs_fs_info *fs_info, e3953975b6a7b3 Michal Rostecki 2021-01-22 5574 struct map_lookup *map, int first, e3953975b6a7b3 Michal Rostecki 2021-01-22 5575 int num_stripes) e3953975b6a7b3 Michal Rostecki 2021-01-22 5576 { e3953975b6a7b3 Michal Rostecki 2021-01-22 5577 int preferred_mirror; e3953975b6a7b3 Michal Rostecki 2021-01-22 5578 u64 last_sched_time; e3953975b6a7b3 Michal Rostecki 2021-01-22 5579 int min_load; e3953975b6a7b3 Michal Rostecki 2021-01-22 5580 int cur_load; e3953975b6a7b3 Michal Rostecki 2021-01-22 5581 u64 duration; e3953975b6a7b3 Michal Rostecki 2021-01-22 5582 u64 now; e3953975b6a7b3 Michal Rostecki 2021-01-22 5583 int i; e3953975b6a7b3 Michal Rostecki 2021-01-22 5584 e3953975b6a7b3 Michal Rostecki 2021-01-22 5585 last_sched_time = this_cpu_read(*fs_info->last_sched_time); e3953975b6a7b3 Michal Rostecki 2021-01-22 5586 if (last_sched_time != 0) { e3953975b6a7b3 Michal Rostecki 2021-01-22 5587 now = ktime_get_ns(); e3953975b6a7b3 Michal Rostecki 2021-01-22 5588 duration = now - last_sched_time; e3953975b6a7b3 Michal Rostecki 2021-01-22 5589 e3953975b6a7b3 Michal Rostecki 2021-01-22 5590 if (duration < (NSEC_PER_MSEC * e3953975b6a7b3 Michal Rostecki 2021-01-22 5591 fs_info->fs_devices->read_policy_load_duration)) e3953975b6a7b3 Michal Rostecki 2021-01-22 5592 return this_cpu_read(*fs_info->last_mirror); e3953975b6a7b3 Michal Rostecki 2021-01-22 5593 } now not initialized on else path. e3953975b6a7b3 Michal Rostecki 2021-01-22 5594 e3953975b6a7b3 Michal Rostecki 2021-01-22 5595 preferred_mirror = first; e3953975b6a7b3 Michal Rostecki 2021-01-22 5596 min_load = INT_MAX; e3953975b6a7b3 Michal Rostecki 2021-01-22 5597 e3953975b6a7b3 Michal Rostecki 2021-01-22 5598 for (i = first; i < first + num_stripes; i++) { e3953975b6a7b3 Michal Rostecki 2021-01-22 5599 cur_load = mirror_load(fs_info, &map->stripes[i]); e3953975b6a7b3 Michal Rostecki 2021-01-22 5600 if (cur_load < min_load) { e3953975b6a7b3 Michal Rostecki 2021-01-22 5601 preferred_mirror = i; e3953975b6a7b3 Michal Rostecki 2021-01-22 5602 min_load = cur_load; e3953975b6a7b3 Michal Rostecki 2021-01-22 5603 } e3953975b6a7b3 Michal Rostecki 2021-01-22 5604 } e3953975b6a7b3 Michal Rostecki 2021-01-22 5605 e3953975b6a7b3 Michal Rostecki 2021-01-22 @5606 this_cpu_write(*fs_info->last_sched_time, now); e3953975b6a7b3 Michal Rostecki 2021-01-22 5607 this_cpu_write(*fs_info->last_mirror, preferred_mirror); e3953975b6a7b3 Michal Rostecki 2021-01-22 5608 return preferred_mirror; e3953975b6a7b3 Michal Rostecki 2021-01-22 5609 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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