linux-kernel - [PATCHv2 5/6] mm: use vma_is_anonymous() in create_huge_pmd() and wp_huge

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Date:	Fri, 17 Jul 2015 14:53:12 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCHv2 5/6] mm: use vma_is_anonymous() in create_huge_pmd() and wp_huge_pmd()

Let's use helper rather than direct check of vma->vm_ops to distinguish
anonymous VMA.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
---
 mm/memory.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index c70252ca9ef9..1c139aa94aff 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3235,7 +3235,7 @@ out:
 static int create_huge_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
 			unsigned long address, pmd_t *pmd, unsigned int flags)
 {
-	if (!vma->vm_ops)
+	if (vma_is_anonymous(vma))
 		return do_huge_pmd_anonymous_page(mm, vma, address, pmd, flags);
 	if (vma->vm_ops->pmd_fault)
 		return vma->vm_ops->pmd_fault(vma, address, pmd, flags);
@@ -3246,7 +3246,7 @@ static int wp_huge_pmd(struct mm_struct *mm, struct vm_area_struct *vma,
 			unsigned long address, pmd_t *pmd, pmd_t orig_pmd,
 			unsigned int flags)
 {
-	if (!vma->vm_ops)
+	if (vma_is_anonymous(vma))
 		return do_huge_pmd_wp_page(mm, vma, address, pmd, orig_pmd);
 	if (vma->vm_ops->pmd_fault)
 		return vma->vm_ops->pmd_fault(vma, address, pmd, flags);
-- 
2.1.4

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