linux-kernel - Mounting sysfs early

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Message-ID: <87a5b0800906190415o1c70b6basfde98269dbacd00e@mail.gmail.com>
Date:	Fri, 19 Jun 2009 12:15:07 +0100
From:	Will Newton <will.newton@...il.com>
To:	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Mounting sysfs early

Hi all,

I currently have a problem with a driver that loads firmware from
userland. The boot process happens in this order:

1. Extract initramfs
2. Load drivers
3. Run init

Unfortunately it appears that step 2 is calling the hotplug helper
which tries to load firmware via sysfs, but sysfs is not mounted until
I have run init so the driver fails to initialise. What is the
recommended way to avoid this situation? Do I have to somehow build
the firmware into the kernel or can I get sysfs mounted before drivers
begin loading?

Thanks,
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