From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] mdev problem in 2011.08 ?
Date: Sun, 18 Sep 2011 16:28:42 +0200 [thread overview]
Message-ID: <20110918162842.02150727@skate> (raw)
In-Reply-To: <4E75EBBF.9080203@openwide.fr>
Hello Pierre,
Le Sun, 18 Sep 2011 15:01:51 +0200,
Pierre Ficheux <pierre.ficheux@openwide.fr> a ?crit :
> May be I'm wrong but it seems there is a problem when using mdev for
> /dev management:
For our mdev and udev support, we assume that the kernel is compiled
with CONFIG_DEVTMPFS and CONFIG_DEVTMPFS_MOUNT. For kernels built by
Buildroot, this is ensured by :
$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
in linux/linux.mk.
For kernels built outside of Buildroot, it's up to the user to enable
those options. In your case, I guess your kernel lacks devtmpfs support
and/or the option to have devtmpfs mounted automatically at boot time,
and this explains why the /dev/null device is missing.
Regards,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2011-09-18 14:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-18 13:01 [Buildroot] mdev problem in 2011.08 ? Pierre Ficheux
2011-09-18 14:28 ` Thomas Petazzoni [this message]
2011-09-18 16:44 ` Pierre Ficheux
2011-09-18 17:14 ` Thomas Petazzoni
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