Btrfs: use signed integer instead of unsigned long integer for log transid
The log trans id is initialized to be 0 every time we create a log tree, and the log tree need be re-created after a new transaction is started, it means the log trans id is unlikely to be a huge number, so we can use signed integer instead of unsigned long integer to save a bit space. Signed-off-by:Miao Xie <miaox@cn.fujitsu.com> Signed-off-by:
Josef Bacik <jbacik@fb.com>
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7483e1a4
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