linux-kernel - [PATCH] mm/mmap.c: Remove redundent 'get_area' function pointer in get_unmapped

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Message-ID: <COL130-W16C972B0457D5C7C9CB06B9560@phx.gbl>
Date:	Sat, 5 Sep 2015 22:09:24 +0800
From:	Chen Gang <xili_gchen_5257@...mail.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
	"riel@...hat.com" <riel@...hat.com>, Michal Hocko <mhocko@...e.cz>,
	"oleg@...hat.com" <oleg@...hat.com>,
	"sasha.levin@...cle.com" <sasha.levin@...cle.com>,
	"pfeiner@...gle.com" <pfeiner@...gle.com>,
	"aarcange@...hat.com" <aarcange@...hat.com>,
	"vishnu.ps@...sung.com" <vishnu.ps@...sung.com>,
	Linux Memory <linux-mm@...ck.org>,
	kernel mailing list <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm/mmap.c: Remove redundent 'get_area' function pointer in
 get_unmapped_area()


>From a1bf4726f71d6d0394b41309944646fc806a8a0c Mon Sep 17 00:00:00 2001
From: Chen Gang <gang.chen.5i5j@...il.com>
Date: Sat, 5 Sep 2015 21:51:08 +0800
Subject: [PATCH] mm/mmap.c: Remove redundent 'get_area' function pointer in
get_unmapped_area()

Call the function pointer directly, then let code a bit simpler.

Signed-off-by: Chen Gang <gang.chen.5i5j@...il.com>
---
 mm/mmap.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 4db7cf0..39fd727 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2012,10 +2012,8 @@ unsigned long
 get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
 		unsigned long pgoff, unsigned long flags)
 {
-	unsigned long (*get_area)(struct file *, unsigned long,
-				  unsigned long, unsigned long, unsigned long);
-
 	unsigned long error = arch_mmap_check(addr, len, flags);
+
 	if (error)
 		return error;
 
@@ -2023,10 +2021,12 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
 	if (len> TASK_SIZE)
 		return -ENOMEM;
 
-	get_area = current->mm->get_unmapped_area;
 	if (file && file->f_op->get_unmapped_area)
-		get_area = file->f_op->get_unmapped_area;
-	addr = get_area(file, addr, len, pgoff, flags);
+		addr = file->f_op->get_unmapped_area(file, addr, len,
+							pgoff, flags);
+	else
+		addr = current->mm->get_unmapped_area(file, addr, len,
+							pgoff, flags);
 	if (IS_ERR_VALUE(addr))
 		return addr;
 
-- 
1.9.3

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