From: Kirill A. Shutemov <kirill@shutemov.name>
Date: Wed, 10 Dec 2014 23:44:22 +0000 (-0800)
Subject: thp: do not mark zero-page pmd write-protected explicitly
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~139^2~122
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e544a4e74e02108035de69f97fde7bdf19dba978;p=pandora-kernel.git

thp: do not mark zero-page pmd write-protected explicitly

Zero pages can be used only in anonymous mappings, which never have
writable vma->vm_page_prot: see protection_map in mm/mmap.c and __PX1X
definitions.

Let's drop redundant pmd_wrprotect() in set_huge_zero_page().

Signed-off-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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