From: Jovi Zhang <bookjovi@gmail.com>
Date: Wed, 22 Aug 2012 02:34:08 +0000 (+0800)
Subject: MIPS: mm: Add compound tail page _mapcount when mapped
X-Git-Tag: v3.6-rc7~6^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af89fa3986b9d034a286544ab1ed95096496a2f9;p=pandora-kernel.git

MIPS: mm: Add compound tail page _mapcount when mapped

See commit b6999b191 which did the same modification for x86's mm/gup,

Quote from commit b6999b191:
    "If compound pages are used and the page is a
    tail page, gup_huge_pmd() increases _mapcount to record tail page are
    mapped while gup_huge_pud does not do that."

[ralf@linux-mips.org: fixed rejects caused by the original patch getting
linewrapped.]

Signed-off-by: Jovi Zhang <boojovi@gmail.com>
Cc: Youquan Song <youquan.song@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: <stable@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/4291/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

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