tree 5a522cb6dbc41eaac987dbf15a2cbae35b2544cc
parent 8c5dc70aae29d2571c0f461d69b37e4e6e01ff4c
author Christoph Hellwig <hch@infradead.org> 1308940180 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1311209264 -0400

fat: remove i_alloc_sem abuse

Add a new rw_semaphore to protect bmap against truncate.  Previous
i_alloc_sem was abused for this, but it's going away in this series.

Note that we can't simply use i_mutex, given that the swapon code
calls ->bmap under it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>