locks: add a dedicated spinlock to protect i_flctx lists
authorJeff Layton <jlayton@primarydata.com>
Fri, 16 Jan 2015 20:05:57 +0000 (15:05 -0500)
committerJeff Layton <jeff.layton@primarydata.com>
Fri, 16 Jan 2015 21:08:49 +0000 (16:08 -0500)
We can now add a dedicated spinlock without expanding struct inode.
Change to using that to protect the various i_flctx lists.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Acked-by: Christoph Hellwig <hch@lst.de>

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