Hi Rusty,

Today's linux-next build (powerpc allnoconfig) failed like this:

In file included from include/linux/sched.h:58,
                 from arch/powerpc/kernel/asm-offsets.c:17:
include/linux/cpumask.h:110: error: 'CONFIG_NR_CPUS' undeclared here (not in a function)

Caused by commit d08dde18aebb15633e5c4480814b77d93a4d68f6 ("cpumask:CONFIG_NR_CPUS-always") from the rr tree.  I applied the following patch.

There are several other architectures that don't appear to have been
updated for this change - how confident ae you that none of them have
been broken as powerpc was?
-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

From: Stephen Rothwell <redacted>
Date: Thu, 23 Oct 2008 20:14:18 +1100
Subject: [PATCH] powerpc: fallout from cpumask CONFIG_NR_CPUS changes

Signed-off-by: Stephen Rothwell <redacted>
---
 arch/powerpc/platforms/Kconfig.cputype |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 548efa5..e8fd928 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype

@@ -242,9 +242,9 @@ config SMP
 	  If you don't know what to do here, say N.
 
 config NR_CPUS
-	int "Maximum number of CPUs (2-1024)"
-	range 2 1024
-	depends on SMP
+	int "Maximum number of CPUs (2-1024)" if SMP
+	range 2 1024 if SMP
+	default "1" if !SMP
 	default "32" if PPC64
 	default "4"
 

-- 
1.5.6.5