On Thu, 27 Feb 2014 10:00:26 +1100 Stephen Rothwell [off-list ref] wrote:

Hi Josh,

On Wed, 26 Feb 2014 02:02:34 -0800 Josh Triplett [off-list ref] wrote:

quoted

On Wed, Feb 26, 2014 at 07:16:27PM +1100, Stephen Rothwell wrote:

quoted

After merging the final tree, today's linux-next build (powerpc64
allnoconfig) failed like this:

arch/powerpc/kernel/built-in.o: In function `.machine_check_queue_event':
(.text+0x11260): undefined reference to `.irq_work_queue'

Caused (or exposed) (along with a lot of warnings) by commit 3dd6115cd60b
("kconfig: make allnoconfig disable options behind EMBEDDED and EXPERT")
from the apm-current tree.

Pre-existing, just now triggerable with just "make allnoconfig" rather
than manually turning off other options (like PRINTK) that select
IRQ_WORK.  (One of the goals of that commit: get those options more
widely used and build-tested.)

The following (untested) patch *should* fix this:
----- 8< -----
From 36a5b6c87292b6c5eeb390ed6dc6acbb8f0a3767 Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@joshtriplett.org>
Date: Wed, 26 Feb 2014 01:58:02 -0800
Subject: [PATCH] ppc: Make PPC_BOOK3S_64 select IRQ_WORK

OK, I added this as a merge fix patch for Andrew's tree today.  Please
check the build results overnight tonight (for next-20140227 at
http://kisskb.ellerman.id.au/linux-next) and submit any more fixes for
the allnoconfig build errors.

yes, let's keep
kconfig-make-allnoconfig-disable-options-behind-embedded-and-expert,
please.  We'll just need to slog our way through the breakage which it
exposes.