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Message-Id: <ced415b95ee585b1ed15.1288798104@v2.random>
Date: Wed, 03 Nov 2010 16:28:24 +0100
From: Andrea Arcangeli <aarcange@...hat.com>
To: linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Morton <akpm@...ux-foundation.org>,
linux-kernel@...r.kernel.org
Cc: Marcelo Tosatti <mtosatti@...hat.com>, Adam Litke <agl@...ibm.com>,
Avi Kivity <avi@...hat.com>,
Hugh Dickins <hugh.dickins@...cali.co.uk>,
Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
Dave Hansen <dave@...ux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Ingo Molnar <mingo@...e.hu>, Mike Travis <travis@....com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
Christoph Lameter <cl@...ux-foundation.org>,
Chris Wright <chrisw@...s-sol.org>, bpicco@...hat.com,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Balbir Singh <balbir@...ux.vnet.ibm.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Johannes Weiner <hannes@...xchg.org>,
Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
Chris Mason <chris.mason@...cle.com>,
Borislav Petkov <bp@...en8.de>
Subject: [PATCH 49 of 66] mprotect: pass vma down to page table walkers
From: Johannes Weiner <hannes@...xchg.org>
Flushing the tlb for huge pmds requires the vma's anon_vma,
so pass along the vma instead of the mm, we can always get the latter
when we need it.
Signed-off-by: Johannes Weiner <hannes@...xchg.org>
Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
Reviewed-by: Rik van Riel <riel@...hat.com>
---
diff --git a/mm/mprotect.c b/mm/mprotect.c
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -78,7 +78,7 @@ static void change_pte_range(struct mm_s
pte_unmap_unlock(pte - 1, ptl);
}
-static inline void change_pmd_range(struct mm_struct *mm, pud_t *pud,
+static inline void change_pmd_range(struct vm_area_struct *vma, pud_t *pud,
unsigned long addr, unsigned long end, pgprot_t newprot,
int dirty_accountable)
{
@@ -88,14 +88,15 @@ static inline void change_pmd_range(stru
pmd = pmd_offset(pud, addr);
do {
next = pmd_addr_end(addr, end);
- split_huge_page_pmd(mm, pmd);
+ split_huge_page_pmd(vma->vm_mm, pmd);
if (pmd_none_or_clear_bad(pmd))
continue;
- change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);
+ change_pte_range(vma->vm_mm, pmd, addr, next, newprot,
+ dirty_accountable);
} while (pmd++, addr = next, addr != end);
}
-static inline void change_pud_range(struct mm_struct *mm, pgd_t *pgd,
+static inline void change_pud_range(struct vm_area_struct *vma, pgd_t *pgd,
unsigned long addr, unsigned long end, pgprot_t newprot,
int dirty_accountable)
{
@@ -107,7 +108,8 @@ static inline void change_pud_range(stru
next = pud_addr_end(addr, end);
if (pud_none_or_clear_bad(pud))
continue;
- change_pmd_range(mm, pud, addr, next, newprot, dirty_accountable);
+ change_pmd_range(vma, pud, addr, next, newprot,
+ dirty_accountable);
} while (pud++, addr = next, addr != end);
}
@@ -127,7 +129,8 @@ static void change_protection(struct vm_
next = pgd_addr_end(addr, end);
if (pgd_none_or_clear_bad(pgd))
continue;
- change_pud_range(mm, pgd, addr, next, newprot, dirty_accountable);
+ change_pud_range(vma, pgd, addr, next, newprot,
+ dirty_accountable);
} while (pgd++, addr = next, addr != end);
flush_tlb_range(vma, start, end);
}
--
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