linux-kernel - [PATCH 1/1] shmem.c: Compilation failure in shmem_file_setup for !CONFIG

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Message-Id: <1329736292-19087-1-git-send-email-consul.kautuk@gmail.com>
Date:	Mon, 20 Feb 2012 06:11:32 -0500
From:	Kautuk Consul <consul.kautuk@...il.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Kautuk Consul <consul.kautuk@...il.com>
Subject: [PATCH 1/1] shmem.c: Compilation failure in shmem_file_setup for !CONFIG_MMU

I disabled the CONFIG_MMU and tried to compile the kernel and got the
following problem:
In function ‘shmem_file_setup’:
error: implicit declaration of function ‘ramfs_nommu_expand_for_mapping’

This is because, we do not include ramfs.h for CONFIG_SHMEM.

Included linux/ramfs.h for both CONFIG_SHMEM as well as !CONFIG_SHMEM.

Signed-off-by: Kautuk Consul <consul.kautuk@...il.com>
---
 mm/shmem.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 269d049..4884188 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -30,6 +30,7 @@
 #include <linux/mm.h>
 #include <linux/export.h>
 #include <linux/swap.h>
+#include <linux/ramfs.h>
 
 static struct vfsmount *shm_mnt;
 
@@ -2442,8 +2443,6 @@ out4:
  * effectively equivalent, but much lighter weight.
  */
 
-#include <linux/ramfs.h>
-
 static struct file_system_type shmem_fs_type = {
 	.name		= "tmpfs",
 	.mount		= ramfs_mount,
-- 
1.7.5.4

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