linux-kernel - [mm][RFC][PATCH 4/11] mm accessor for kvm

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Date:	Wed, 16 Dec 2009 12:04:23 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, cl@...ux-foundation.org,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>, andi@...stfloor.org,
	minchan.kim@...il.com
Subject: [mm][RFC][PATCH 4/11] mm accessor for kvm

Use mm_accessor in /kvm layer.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
 security/tomoyo/common.c |    4 ++--
 virt/kvm/kvm_main.c      |    6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

Index: mmotm-mm-accessor/virt/kvm/kvm_main.c
===================================================================
--- mmotm-mm-accessor.orig/virt/kvm/kvm_main.c
+++ mmotm-mm-accessor/virt/kvm/kvm_main.c
@@ -843,18 +843,18 @@ pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t 
 	if (unlikely(npages != 1)) {
 		struct vm_area_struct *vma;
 
-		down_read(&current->mm->mmap_sem);
+		mm_read_lock(current->mm);
 		vma = find_vma(current->mm, addr);
 
 		if (vma == NULL || addr < vma->vm_start ||
 		    !(vma->vm_flags & VM_PFNMAP)) {
-			up_read(&current->mm->mmap_sem);
+			mm_read_unlock(current->mm);
 			get_page(bad_page);
 			return page_to_pfn(bad_page);
 		}
 
 		pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
-		up_read(&current->mm->mmap_sem);
+		mm_read_unlock(current->mm);
 		BUG_ON(!kvm_is_mmio_pfn(pfn));
 	} else
 		pfn = page_to_pfn(page[0]);

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