linux-kernel - [PATCH v3 4/7] mm: pass fault address to clear_huge

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Date:	Thu, 16 Aug 2012 18:15:51 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	linux-mm@...ck.org
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Alex Shi <alex.shu@...el.com>,
	Jan Beulich <jbeulich@...ell.com>,
	Robert Richter <robert.richter@....com>,
	Andy Lutomirski <luto@...capital.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-mips@...ux-mips.org,
	linux-sh@...r.kernel.org, sparclinux@...r.kernel.org
Subject: [PATCH v3 4/7] mm: pass fault address to clear_huge_page()

From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 include/linux/mm.h |    2 +-
 mm/huge_memory.c   |    2 +-
 mm/hugetlb.c       |    3 ++-
 mm/memory.c        |    7 ++++---
 4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 311be90..2858723 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1638,7 +1638,7 @@ extern void dump_page(struct page *page);
 
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void clear_huge_page(struct page *page,
-			    unsigned long addr,
+			    unsigned long haddr, unsigned long fault_address,
 			    unsigned int pages_per_huge_page);
 extern void copy_user_huge_page(struct page *dst, struct page *src,
 				unsigned long addr, struct vm_area_struct *vma,
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 6f0825b611..070bf89 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -644,7 +644,7 @@ static int __do_huge_pmd_anonymous_page(struct mm_struct *mm,
 	if (unlikely(!pgtable))
 		return VM_FAULT_OOM;
 
-	clear_huge_page(page, haddr, HPAGE_PMD_NR);
+	clear_huge_page(page, haddr, address, HPAGE_PMD_NR);
 	__SetPageUptodate(page);
 
 	spin_lock(&mm->page_table_lock);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3c86d3d..5182192 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2718,7 +2718,8 @@ retry:
 				ret = VM_FAULT_SIGBUS;
 			goto out;
 		}
-		clear_huge_page(page, haddr, pages_per_huge_page(h));
+		clear_huge_page(page, haddr, fault_address,
+				pages_per_huge_page(h));
 		__SetPageUptodate(page);
 
 		if (vma->vm_flags & VM_MAYSHARE) {
diff --git a/mm/memory.c b/mm/memory.c
index 5736170..dfc179b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3984,19 +3984,20 @@ static void clear_gigantic_page(struct page *page,
 	}
 }
 void clear_huge_page(struct page *page,
-		     unsigned long addr, unsigned int pages_per_huge_page)
+		     unsigned long haddr, unsigned long fault_address,
+		     unsigned int pages_per_huge_page)
 {
 	int i;
 
 	if (unlikely(pages_per_huge_page > MAX_ORDER_NR_PAGES)) {
-		clear_gigantic_page(page, addr, pages_per_huge_page);
+		clear_gigantic_page(page, haddr, pages_per_huge_page);
 		return;
 	}
 
 	might_sleep();
 	for (i = 0; i < pages_per_huge_page; i++) {
 		cond_resched();
-		clear_user_highpage(page + i, addr + i * PAGE_SIZE);
+		clear_user_highpage(page + i, haddr + i * PAGE_SIZE);
 	}
 }
 
-- 
1.7.7.6

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