From: Zhang Yanfei <zhangyanfei.yes@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux MM <linux-mm@kvack.org>
Subject: [PATCH] mm, vmalloc: Use clamp to simplify code
Date: Mon, 03 Jun 2013 23:39:34 +0800 [thread overview]
Message-ID: <51ACB8B6.60603@gmail.com> (raw)
From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
---
mm/vmalloc.c | 12 ++----------
1 files changed, 2 insertions(+), 10 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d365724..2d7eb81 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1337,16 +1337,8 @@ static struct vm_struct *__get_vm_area_node(unsigned long size,
struct vm_struct *area;
BUG_ON(in_interrupt());
- if (flags & VM_IOREMAP) {
- int bit = fls(size);
-
- if (bit > IOREMAP_MAX_ORDER)
- bit = IOREMAP_MAX_ORDER;
- else if (bit < PAGE_SHIFT)
- bit = PAGE_SHIFT;
-
- align = 1ul << bit;
- }
+ if (flags & VM_IOREMAP)
+ align = 1ul << clamp(fls(size), PAGE_SHIFT, IOREMAP_MAX_ORDER);
size = PAGE_ALIGN(size);
if (unlikely(!size))
--
1.7.1
--
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reply other threads:[~2013-06-03 15:39 UTC|newest]
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