From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Thu, 6 Nov 2008 20:53:57 +0000 (-0800)
Subject: fat: mmu_private race fix
X-Git-Tag: v2.6.28-rc4~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2bdf67eb1631f30e2f3f5d49e4007c76e88877a8;p=pandora-kernel.git

fat: mmu_private race fix

mmu_private is 64bits value, hence it's not atomic to update.

So, the access rule for mmu_private is we must hold ->i_mutex.  But,
fat_get_block() path doesn't follow the rule on non-allocation path.

This fixes by using i_size instead if non-allocation path.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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