Btrfs: add missing spin_lock for insertion into tree mod log
tree_mod_alloc calls __get_tree_mod_seq and must acquire a spinlock before
doing so.
Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>
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tree_mod_alloc calls __get_tree_mod_seq and must acquire a spinlock before
doing so.
Signed-off-by: NJan Schmidt <list.btrfs@jan-o-sch.net>