On Fri, Oct 16, 2015 at 4:23 PM, Olof Johansson [off-list ref] wrote:

Hi,

I've bisected boot failures in next-20151016 down to patches in this branch:

On Thu, Oct 15, 2015 at 4:42 AM, Tomeu Vizoso
[off-list ref] wrote:

quoted

Tomeu Vizoso (20):
      driver core: handle -EPROBE_DEFER from bus_type.match()

The machine it happened on was OMAP5UEVM:

http://arm-soc.lixom.net/bootlogs/next/next-20151016/omap5uevm-arm-omap2plus_defconfig.html

So this one is because the MMC node numbering changed. I don't know
how to fix that other than with aliases, but that doesn't solve
backwards compatibility.

But I've also seen it on tegra2, that one bisected down to:

quoted

     regulator: core: Probe regulators on demand

http://arm-soc.lixom.net/bootlogs/next/next-20151016/seaboard-arm-multi_v7_defconfig.html

This one you need a rootwait I think. The MMC scanning is not
guaranteed to be done before the rootfs mounting AFAIK. There may be
other problems, but we can't see them since it panics.

Rob