linux-kernel - [PATCH 3/7] pin

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Date:	Mon, 19 Mar 2007 13:05:34 -0700
From:	Adam Litke <agl@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Adam Litke <agl@...ibm.com>,
	Arjan van de Ven <arjan@...radead.org>,
	William Lee Irwin III <wli@...omorphy.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ken Chen <kenchen@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] pin_pages for hugetlb


Signed-off-by: Adam Litke <agl@...ibm.com>
---

 fs/hugetlbfs/inode.c |    1 +
 mm/memory.c          |    6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 2452dde..d0b4b46 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -567,6 +567,7 @@ const struct file_operations hugetlbfs_file_operations = {
 
 static const struct pagetable_operations_struct hugetlbfs_pagetable_ops = {
 	.copy_vma		= copy_hugetlb_page_range,
+	.pin_pages		= follow_hugetlb_page,
 };
 
 static const struct inode_operations hugetlbfs_dir_inode_operations = {
diff --git a/mm/memory.c b/mm/memory.c
index 69bb0b3..01256cf 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1039,9 +1039,9 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 				|| !(vm_flags & vma->vm_flags))
 			return i ? : -EFAULT;
 
-		if (is_vm_hugetlb_page(vma)) {
-			i = follow_hugetlb_page(mm, vma, pages, vmas,
-						&start, &len, i);
+		if (has_pt_op(vma, pin_pages)) {
+			i = pt_op(vma, pin_pages)(mm, vma, pages,
+						vmas, &start, &len, i);
 			continue;
 		}
 
-
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