This is a note to let you know that I've just added the patch titled
MIPS: mm: Add compound tail page _mapcount when mapped
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-mm-add-compound-tail-page-_mapcount-when-mapped.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From af89fa3986b9d034a286544ab1ed95096496a2f9 Mon Sep 17 00:00:00 2001
From: Jovi Zhang <[email protected]>
Date: Wed, 22 Aug 2012 10:34:08 +0800
Subject: MIPS: mm: Add compound tail page _mapcount when mapped
From: Jovi Zhang <[email protected]>
commit af89fa3986b9d034a286544ab1ed95096496a2f9 upstream.
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."
[[email protected]: fixed rejects caused by the original patch getting
linewrapped.]
Signed-off-by: Jovi Zhang <[email protected]>
Cc: Youquan Song <[email protected]>
Cc: Andi Kleen <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/4291/
Signed-off-by: Ralf Baechle <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/mips/mm/gup.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/mips/mm/gup.c
+++ b/arch/mips/mm/gup.c
@@ -152,6 +152,8 @@ static int gup_huge_pud(pud_t pud, unsig
do {
VM_BUG_ON(compound_head(page) != head);
pages[*nr] = page;
+ if (PageTail(page))
+ get_huge_page_tail(page);
(*nr)++;
page++;
refs++;
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/mips-mm-add-compound-tail-page-_mapcount-when-mapped.patch
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