From: Chris Zankel <chris@zankel.net>
Date: Mon, 20 May 2013 18:09:13 +0000 (-0700)
Subject: xtensa: fix TLB multihit exceptions
X-Git-Tag: v3.11-rc1~25^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7711ece9b31f0f3cf15ca16005dfd78988ea8f7e;p=pandora-kernel.git

xtensa: fix TLB multihit exceptions

- set _PAGE_USER in the pte_clear to avoid having TLB multihit exceptions
  (see following threads for more details);
  http://lists.linux-xtensa.org/pipermail/linux-xtensa/Week-of-Mon-20130401/
  http://lists.linux-xtensa.org/pipermail/linux-xtensa/Week-of-Mon-20130408/
- improved documentation of the PTE layout
- fix PTE mapping for present and 'prot_none' pages for T1050 hw and earlier
- fix pte_file offset and size
- add check for the correct number of bits for swap type

CC: piet.delaney@gmail.com
CC: jcmvbkbc@gmail.com
Signed-off-by: Chris Zankel <chris@zankel.net>
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