From: Christoph Hellwig <hch@infradead.org>
Date: Fri, 24 Jun 2011 18:29:40 +0000 (-0400)
Subject: fat: remove i_alloc_sem abuse
X-Git-Tag: v3.1-rc1~282^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=582686915803e34adc8fdcd90bff7ca7f6a42221;p=pandora-kernel.git

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>
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