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Date: Sun, 29 Jun 2014 00:18:18 +0100 (BST)
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Subject: [PATCH] sched.h: Remove useless `const' from function return type
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To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>, Preeti U Murthy <preeti@linux.vnet.ibm.com>Dietmar Eggemann <dietmar.eggemann@arm.com>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Bjorn Helgaas <bhelgaas@google.com>, Chris Metcalf <cmetcalf@tilera.com>, Christoph Lameter <cl@linux.com>, "David S. Miller" <davem@davemloft.net>, Fenghua Yu <fenghua.yu@intel.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Hanjun Guo <hanjun.guo@linaro.org>, Heiko Carstens <heiko.carstens@de.ibm.com>, Jason Low <jason.low2@hp.com>, Linus Torvalds <torvalds@linux-foundation.org>, Martin Schwidefsky <schwidefsky@de.ibm.com>, Tony Luck <tony.luck@intel.com>, linux390@de.ibm.com, linux-ia64@vger.kernel.org, linux-s390@vger.kernel.org, Ingo Molnar <mingo@kernel.org>, linux-kernel@vger.kernel.org
List-ID: <linux-s390.vger.kernel.org>

This fixes:

cc1: warnings being treated as errors
In file included from include/linux/ptrace.h:5,
                 from arch/mips/kernel/cpu-probe.c:16:
include/linux/sched.h:1002: warning: type qualifiers ignored on function return type
make[2]: *** [arch/mips/kernel/cpu-probe.o] Error 1

This is a regression introduced with commit 
143e1e28cb40bed836b0a06567208bd7347c9672 [sched: Rework sched_domain 
topology definition].  The warning itself is benign except in places like 
the arch/mips subtree where we use `-Werror' to enforce good coding 
practices.  Apparently the warning is GCC-version specific, some versions 
produce it and some do not.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
---
Vincent,

 Did you mean:

typedef int __attribute__((const)) (*sched_domain_flags_f)(void);

by any chance?

  Maciej

linux-sched-domain-flags-type.patch
Index: linux-20140623-swarm64/include/linux/sched.h
===================================================================
--- linux-20140623-swarm64.orig/include/linux/sched.h
+++ linux-20140623-swarm64/include/linux/sched.h
@@ -999,7 +999,7 @@ void free_sched_domains(cpumask_var_t do
 bool cpus_share_cache(int this_cpu, int that_cpu);
 
 typedef const struct cpumask *(*sched_domain_mask_f)(int cpu);
-typedef const int (*sched_domain_flags_f)(void);
+typedef int (*sched_domain_flags_f)(void);
 
 #define SDTL_OVERLAP	0x01