ARM: OMAP2+: enable devtmpfs and devtmpfs automount

Since udev-182, udev no longer creates device nodes under /dev

and this has to be managed by the kernel devtmpfs filesystem.

This means that a kernel built with the current OMAP2+ config will not boot on a system with a recent udev.

Also, it is good to have /dev automatically mounted since some non-initramfs based setups assumes this and don't manually mount it.

Quoted 1 line · Javier Martinez Canillas

Since udev-182, udev no longer creates device nodes under /dev

Nit: Looks like this happened from udev-176 onward.

http://permalink.gmane.org/gmane.linux.hotplug.devel/17230

Whoever is taking the patch can _probably_ fix it up while applying.

Quoted 7 lines

and this has to be managed by the kernel devtmpfs filesystem.

This means that a kernel built with the current OMAP2+ config will not boot on a system with a recent udev.

Also, it is good to have /dev automatically mounted since some non-initramfs based setups assumes this and don't manually mount it.

For curiosity sake, any examples of such setups? I am using fedora 17 on DaVinci and that doesn't seem to need it. Anyway, agreed that its better to keep it enabled.

Thanks,
Sekhar

Since udev-182, udev no longer creates device nodes under /dev and this has to be managed by the kernel devtmpfs filesystem.

This means that a kernel built with the current OMAP2+ config will not boot on a system with a recent udev.

Also, it is good to have /dev automatically mounted since some non-initramfs based setups assumes this and don't manually mount it.

Signed-off-by Javier Martinez Canillas <[email protected]>

---
 arch/arm/configs/omap2plus_defconfig |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

arch/arm/configs/omap2plus_defconfig +2 -0

index 6230304..6333e96 100644
@@ -65,6 +65,8 @@ CONFIG_MAC80211_RC_PID=y
 CONFIG_MAC80211_RC_DEFAULT_PID=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_CONNECTOR=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_CHAR=y

Signature · 6 lines

1.7.7.6

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Quoted 6 lines · Javier Martinez Canillas

Since udev-182, udev no longer creates device nodes under /dev and this has to be managed by the kernel devtmpfs filesystem.

This means that a kernel built with the current OMAP2+ config will not boot on a system with a recent udev.

Quoted 2 lines

Also, it is good to have /dev automatically mounted since some non-initramfs based setups assumes this and don't manually mount it.

Thanks applying into omap-for-v3.8/fixes-for-merge-window.

Regards,

Tony