Hi Yan,
Smatch complains about this code from 2008.
fs/btrfs/volumes.c +1417 btrfs_rm_device(157)
error: we previously assumed 'fs_devices' could be null (see line 1412)
1412 while (fs_devices) {
^^^^^^^^^^
checked here.
1413 if (fs_devices->seed == cur_devices)
1414 break;
1415 fs_devices = fs_devices->seed;
1416 }
1417 fs_devices->seed = cur_devices->seed;
^^^^^^^^^^^^
dereferenced here.
If we don't hit the break statement, then at the end of the loop we'd
oops.
regards,
dan carpenter
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