[PATCH -next] initramfs: fix compilation warning

[Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>]

From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>

  CC      init/initramfs.o
init/initramfs.c:517: warning: 'clean_rootfs' defined but not used

clean_rootfs is not used when CONFIG_BLK_DEV_RAM disabled.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
---
 init/initramfs.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/init/initramfs.c b/init/initramfs.c
index da8d030..2f056e2 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -512,6 +512,7 @@ skip:
 	initrd_end = 0;
 }
 
+#ifdef CONFIG_BLK_DEV_RAM
 #define BUF_SIZE 1024
 static void __init clean_rootfs(void)
 {
@@ -558,6 +559,7 @@ static void __init clean_rootfs(void)
 	sys_close(fd);
 	kfree(buf);
 }
+#endif
 
 static int __init populate_rootfs(void)
 {
-- 
1.5.6