[OE-core] [PATCH] var/volatile: Mount it if doing ro-rfs

[Richard Purdie]

On Wed, 2015-03-11 at 08:33 +0000, Khem Raj wrote:
> - Do not mount /var/volatile to be tmpfs always only when generating
>   readonly rootfs
> - Generate var-volatile.mount unit when using system in readonly-rootfs
>   to mount /var/volatile as tmpfs
> - for sysvinit, mount /var/volatile to be tmpfs if its not already
>   mounted so
> - Use RequiresMountsFor instead of After=, so systemd figures out the
>   needed dependencies for making /var/volatile accessible for journald
>   and not us.
> 
> Change-Id: I0b176b3e1c1e88e84d2c93154aac04cef565d8ea
> Signed-off-by: Khem Raj <raj.khem at gmail.com>
> ---
>  meta/classes/image.bbclass                                             | 1 +
>  meta/recipes-core/base-files/base-files/fstab                          | 1 -
>  meta/recipes-core/initscripts/initscripts-1.0/read-only-rootfs-hook.sh | 2 +-
>  meta/recipes-core/systemd/systemd/journald-volatile.conf               | 2 +-
>  4 files changed, 3 insertions(+), 3 deletions(-)

Which combinations has this been tested with? Given the time the patch
has existed for, I'm sceptical all the combinations we need have been
tested, I'd love to be wrong. 

This is a pretty major change of behaviour and given the problems
previous changes have caused, I'm very very very nervous about what
issues this is going to cause :(.

Cheers,

Richard