linux-kernel - [cleanup][PATCH 2/2] mlock_vma_pages_range() only return success or failure

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Message-Id: <20091228114611.A67B.A69D9226@jp.fujitsu.com>
Date:	Mon, 28 Dec 2009 11:46:38 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [cleanup][PATCH 2/2] mlock_vma_pages_range() only return success or failure

Currently, mlock_vma_pages_range() only return len or 0. then
current error handling of mmap_region() is meaningless complex.

this patch makes simplify and makes consist with brk() code.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/mmap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 826b0ec..0f10176 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1247,8 +1247,8 @@ out:
 	mm->total_vm += len >> PAGE_SHIFT;
 	vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
 	if (vm_flags & VM_LOCKED) {
-		long nr_pages = mlock_vma_pages_range(vma, addr, addr + len);
-		mm->locked_vm += (len >> PAGE_SHIFT) - nr_pages;
+		if (!mlock_vma_pages_range(vma, addr, addr + len))
+			mm->locked_vm += (len >> PAGE_SHIFT);
 	} else if ((flags & MAP_POPULATE) && !(flags & MAP_NONBLOCK))
 		make_pages_present(addr, addr + len);
 	return addr;
-- 
1.6.5.2



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