tree 26d761d3c4cca09b58538a576948a7ba720f7d5a
parent d1ee2971f5bd8a16bc5ecfe1b00e14b4fe407c4f
author Thomas Tuttle <ttuttle@google.com> 1212731191 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1212776951 -0700

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>