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由 Nikolay Borisov 提交于
btrfs_device structs are freed from RCU context since device iteration is protected by RCU. Currently this is achieved by using call_rcu since no blocking functions are called within btrfs_free_device. Future refactoring of pending/pinned chunks will require calling sleeping functions. This patch is in preparation for these changes by simply switching from RCU callbacks to explicit calls of synchronize_rcu and calling btrfs_free_device directly. This is functionally equivalent, making sure that there are no readers at that time. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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