Re: [PATCH 2/5] btrfs: Factor out loop logic from btrfs_free_extra_devids

kernel test robot
2020-07-15T12:33:21Z

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Hi Nikolay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on kdave/for-next]
[also build test WARNING on v5.8-rc5 next-20200715]
[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/Nikolay-Borisov/Convert-seed-devices-to-proper-list-API/20200715-185102
base: https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
config: x86_64-rhel-7.6-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce (this is a W=1 build):
# 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@intel.com>

All warnings (new ones prefixed by >>):

In file included from fs/btrfs/volumes.c:17:
fs/btrfs/ctree.h:2271:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
2271 | size_t __const btrfs_get_num_csums(void);
| ^~~~~~~
In file included from fs/btrfs/volumes.c:28:
fs/btrfs/sysfs.h:16:1: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
16 | const char * const btrfs_feature_set_name(enum btrfs_feature_set set);
| ^~~~~
>> fs/btrfs/volumes.c:1029:6: warning: no previous prototype for '__btrfs_free_extra_devids' [-Wmissing-prototypes]
1029 | void __btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step,
| ^~~~~~~~~~~~~~~~~~~~~~~~~

vim +/__btrfs_free_extra_devids +1029 fs/btrfs/volumes.c

1026
1027
1028
> 1029 void __btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step,
1030 struct btrfs_device **latest_dev)
1031 {
1032 struct btrfs_device *device, *next;
1033
1034 /* This is the initialized path, it is safe to release the devices. */
1035 list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
1036 if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
1037 &device->dev_state)) {
1038 if (!test_bit(BTRFS_DEV_STATE_REPLACE_TGT,
1039 &device->dev_state) &&
1040 !test_bit(BTRFS_DEV_STATE_MISSING,
1041 &device->dev_state) &&
1042 (!*latest_dev ||
1043 device->generation > (*latest_dev)->generation)) {
1044 *latest_dev = device;
1045 }
1046 continue;
1047 }
1048
1049 if (device->devid == BTRFS_DEV_REPLACE_DEVID) {
1050 /*
1051 * In the first step, keep the device which has
1052 * the correct fsid and the devid that is used
1053 * for the dev_replace procedure.
1054 * In the second step, the dev_replace state is
1055 * read from the device tree and it is known
1056 * whether the procedure is really active or
1057 * not, which means whether this device is
1058 * used or whether it should be removed.
1059 */
1060 if (step == 0 || test_bit(BTRFS_DEV_STATE_REPLACE_TGT,
1061 &device->dev_state)) {
1062 continue;
1063 }
1064 }
1065 if (device->bdev) {
1066 blkdev_put(device->bdev, device->mode);
1067 device->bdev = NULL;
1068 fs_devices->open_devices--;
1069 }
1070 if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state)) {
1071 list_del_init(&device->dev_alloc_list);
1072 clear_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
1073 if (!test_bit(BTRFS_DEV_STATE_REPLACE_TGT,
1074 &device->dev_state))
1075 fs_devices->rw_devices--;
1076 }
1077 list_del_init(&device->dev_list);
1078 fs_devices->num_devices--;
1079 btrfs_free_device(device);
1080 }
1081

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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