btrfs: use mutex in btrfs_resume_balance_async

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While the spinlock does not cause problems, using the mutex is more
correct and consistent with others. The global status of balance is eg.
checked from btrfs_pause_balance or btrfs_cancel_balance with mutex.

Resuming balance happens during mount or ro->rw remount. In the former
case, no other user of the balance_ctl exists, in the latter, balance
cannot run until the ro/rw transition is finished.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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David Sterba 2018-03-21 02:29:13 +01:00

parent 008ef0969d

commit 1354e1a13e

1 changed files with 3 additions and 3 deletions

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fs/btrfs/volumes.c

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