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nilfs2: introduce nilfs_prepare_super
authorJiro SEKIBA <jir@unicus.jp>
Mon, 28 Jun 2010 08:49:32 +0000 (17:49 +0900)
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Fri, 23 Jul 2010 01:02:10 +0000 (10:02 +0900)
This function checks validity of super block pointers.
If first super block is invalid, it will swap the super blocks.
The function should be called before any super block information updates.
Caller must obtain nilfs->ns_sem.

Signed-off-by: Jiro SEKIBA <jir@unicus.jp>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

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