linux-kernel - Re: [PATCH 04/14] Pramfs: Mounting as root filesystem

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Message-Id: <200906140104.43463.arnd@arndb.de>
Date:	Sun, 14 Jun 2009 01:04:42 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Marco <marco.stornelli@...il.com>
Cc:	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Linux Embedded <linux-embedded@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Daniel Walker <dwalker@....ucsc.edu>
Subject: Re: [PATCH 04/14] Pramfs: Mounting as root filesystem

On Saturday 13 June 2009, Marco wrote:
>  void __init mount_root(void)
>  {
> +#ifdef CONFIG_ROOT_PRAMFS
> +       if (MAJOR(ROOT_DEV) == MEM_MAJOR) {
> +               if (mount_pramfs_root())
> +                       return;
> +
> +               printk(KERN_ERR "VFS: Unable to mount root fs via PRAMFS, trying floppy.\n");
> +               ROOT_DEV = Root_FD0;
> +       }
> +#endif

AFAICT, this will prevent booting from /dev/ram0 with a regular file system,
because that also uses MAJOR(ROOT_DEV) == 1.

	Arnd <><
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