revert "initramfs: cleanup incomplete rootfs"

Revert ff1522bb7d ("initramfs: cleanup incomplete rootfs").

Andy reports

: This breaks my setup where I have U-boot provided more size of initramfs
: than needed.  This allows a bit of flexibility to increase or decrease
: initramfs compressed image without taking care of bootloader.  The proper
: solution is to do this if we sure that we didn't get enough memory,
: otherwise I can't consider the error fatal to clean up rootfs.

Fixes: ff1522bb7d ("initramfs: cleanup incomplete rootfs")
Reported-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: David Engraf <david.engraf@sysgo.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

init/initramfs.c

@@ -550,6 +550,7 @@ skip:
 	initrd_end = 0;
 }
 
+#ifdef CONFIG_BLK_DEV_RAM
 #define BUF_SIZE 1024
 static void __init clean_rootfs(void)
 {
@@ -596,6 +597,7 @@ static void __init clean_rootfs(void)
 	ksys_close(fd);
 	kfree(buf);
 }
+#endif
 
 static int __init populate_rootfs(void)
 {
@@ -638,10 +640,8 @@ static int __init populate_rootfs(void)
 		printk(KERN_INFO "Unpacking initramfs...\n");
 		err = unpack_to_rootfs((char *)initrd_start,
 			initrd_end - initrd_start);
-		if (err) {
+		if (err)
 			printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err);
-			clean_rootfs();
-		}
 		free_initrd();
 #endif
 	}