From: Becky Bruce <beckyb@kernel.crashing.org>
Date: Tue, 26 Jul 2011 00:11:49 +0000 (-0700)
Subject: fs/hugetlbfs/inode.c: fix pgoff alignment checking on 32-bit
X-Git-Tag: v3.1-rc1~241^2~120
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2b37c35e6552b0d04d5db9728bc7af22d53f731a;p=pandora-kernel.git

fs/hugetlbfs/inode.c: fix pgoff alignment checking on 32-bit

This:

    vma->vm_pgoff & ~(huge_page_mask(h) >> PAGE_SHIFT)

is incorrect on 32-bit.  It causes us to & the pgoff with something that
looks like this (for a 4m hugepage): 0xfff003ff.  The mask should be
flipped and *then* shifted, to give you 0x0000_03fff.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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