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initscripts/sysfs.sh: Mount devtmpfs on /dev/ if needed

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When booting from an initrd disk, or when the kernel config option
DEVTMPFS_MOUNT isn't provided, /dev/ will not be mounted at boot.

This small addition will check if /dev/ is "useful", and if not, will
mount devtmpfs if the kernel provides it.

With this change, it is possible to set an initscripts style image type
to "cpio.gz" and boot it as initrd. Without this change, the image won't
work properly because of the missing devices.

(From OE-Core rev: a1cfb8a2691ed36700c96cbc1a0e744494294d2b)

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mike Looijmans
2015-10-20 08:43:47 +02:00
committed by Richard Purdie
parent 022f8cc7eb
commit c509c781eb
1 changed files with 4 additions and 0 deletions
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4
meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh
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@@ -21,3 +21,7 @@ fi
if [ -e /sys/kernel/debug ] && grep -q debugfs /proc/filesystems; then
mount -t debugfs debugfs /sys/kernel/debug
fi
if ! [ -e /dev/zero ] && [ -e /dev ] && grep -q devtmpfs /proc/filesystems; then
mount -n -t devtmpfs devtmpfs /dev
fi