linux-kernel - [PATCH] HugeTLB: Fix unused variable warning

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Date:	Thu, 24 Sep 2009 11:02:32 +0100
From:	David Howells <dhowells@...hat.com>
To:	torvalds@...l.org, akpm@...ux-foundation.org
Cc:	ebmunson@...ibm.com, rientjes@...gle.com, dhowells@...hat.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH] HugeTLB: Fix unused variable warning

Fix an unused variable warning:

	mm/mmap.c: In function 'do_mmap_pgoff':
	mm/mmap.c:953: warning: unused variable 'user'

by converting the CONFIG_HUGETLBFS=n version of hugetlb_file_setup() into an
inline function instead of a macro.

Introduced by:

	commit 4e52780d41a741fb4861ae1df2413dd816ec11b1
	Author: Eric B Munson <ebmunson@...ibm.com>
	Date:   Mon Sep 21 17:03:47 2009 -0700
	hugetlb: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions

Signed-off-by: David Howells <dhowells@...hat.com>
---

 include/linux/hugetlb.h |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)


diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 176e7ee..c5d3111 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -3,6 +3,8 @@
 
 #include <linux/fs.h>
 
+struct user_struct;
+
 #ifdef CONFIG_HUGETLB_PAGE
 
 #include <linux/mempolicy.h>
@@ -10,7 +12,6 @@
 #include <asm/tlbflush.h>
 
 struct ctl_table;
-struct user_struct;
 
 int PageHuge(struct page *page);
 
@@ -187,7 +188,13 @@ static inline void set_file_hugepages(struct file *file)
 
 #define is_file_hugepages(file)			0
 #define set_file_hugepages(file)		BUG()
-#define hugetlb_file_setup(name,size,acct,user,creat)	ERR_PTR(-ENOSYS)
+
+static inline
+struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag,
+				struct user_struct **user, int creat_flags)
+{
+ 	return ERR_PTR(-ENOSYS);
+}
 
 #endif /* !CONFIG_HUGETLBFS */
 

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