From: Thomas Tuttle <ttuttle@google.com>
Date: Fri, 6 Jun 2008 05:46:31 +0000 (-0700)
Subject: pagemap: fix bug in add_to_pagemap, require aligned-length reads of /proc/pid/pagemap
X-Git-Tag: v2.6.26-rc6~61
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aae8679b0ebcaa92f99c1c3cb0cd651594a43915;p=pandora-kernel.git

pagemap: fix bug in add_to_pagemap, require aligned-length reads of /proc/pid/pagemap

Fix a bug in add_to_pagemap.  Previously, since pm->out was a char *,
put_user was only copying 1 byte of every PFN, resulting in the top 7
bytes of each PFN not being copied.  By requiring that reads be a multiple
of 8 bytes, I can make pm->out and pm->end u64*s instead of char*s, which
makes put_user work properly, and also simplifies the logic in
add_to_pagemap a bit.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Thomas Tuttle <ttuttle@google.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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