init-live.sh: make $ROOT_MOUNT/media writable when necessary

If the live image is mounted as read-only, we cannot make necessary
directories under $ROOT_MOUNT/media, so trying to move the mount points
lead to errors.

So in case that no unification filesystem mechanism is available in kernel
and the rootfs is mounted as read-only, we mount tmpfs on $ROOT_MOUNT/media
so that it's possible to make necessary directories under it.

[YOCTO #4881]
[YOCTO #4103]

(From OE-Core rev: aeeb3418ff08dfd29edc0ce8a41cb6887d4e11fe)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index 890c56280a..861d874657 100644
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -184,6 +184,8 @@ mount_and_boot() {
         "")
             if ! mount -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then
                 fatal "Could not mount rootfs image"
+            else
+                mount -t tmpfs -o rw,noatime,mode=755 tmpfs $ROOT_MOUNT/media
             fi
             ;;
     esac