linux-kernel - [mm][RFC][PATCH 5/11] mm accessor for tomoyo

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Date:	Wed, 16 Dec 2009 12:05:19 +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 5/11] mm accessor for tomoyo

Replace mmap_sem with mm_accessor().
for security layer.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
---
 security/tomoyo/common.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: mmotm-mm-accessor/security/tomoyo/common.c
===================================================================
--- mmotm-mm-accessor.orig/security/tomoyo/common.c
+++ mmotm-mm-accessor/security/tomoyo/common.c
@@ -759,14 +759,14 @@ static const char *tomoyo_get_exe(void)
 
 	if (!mm)
 		return NULL;
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm);
 	for (vma = mm->mmap; vma; vma = vma->vm_next) {
 		if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
 			cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
 			break;
 		}
 	}
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm);
 	return cp;
 }
 

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