linux-kernel - [PATCH] sched: Enable arch-specific asym packing option in sched domain

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Date:	Fri, 4 May 2012 13:28:30 -0700
From:	Diwakar Tundlam <dtundlam@...dia.com>
To:	'Ingo Molnar' <mingo@...nel.org>,
	'Peter Zijlstra' <a.p.zijlstra@...llo.nl>,
	'Andrew Morton' <akpm@...ux-foundation.org>,
	'Christoph Lameter' <cl@...two.org>,
	'Stephen Rothwell' <sfr@...b.auug.org.au>,
	'Benjamin Herrenschmidt' <benh@...nel.crashing.org>,
	'David Rientjes' <rientjes@...gle.com>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
CC:	Peter De Schrijver <pdeschrijver@...dia.com>
Subject: [PATCH] sched: Enable arch-specific asym packing option in sched
 domain

Add arch specific (weak) routine to set (or not set) the ASYM_PACKING
sched domain flag. This change itself does nothing, but allows archs
that require asym-packing option to set it by implementing the arch
specific routine to turn it on.
    
The weak symbol is already defined in sched_fair.c but was mis-spelled
in the header file. Fixed spelling error in the weak symbol definition.
    
Change-Id: Ibdf38e0a40f76ee3c1829f08b5feedcf900a1b89
Signed-off-by: Diwakar Tundlam <dtundlam@...dia.com>
---
 include/linux/sched.h    |    2 +-
 include/linux/topology.h |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c569719..cf793f0 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -903,7 +903,7 @@ static inline int sd_balance_for_package_power(void)
        return SD_PREFER_SIBLING;
 }
 
-extern int __weak arch_sd_sibiling_asym_packing(void);
+extern int __weak arch_sd_sibling_asym_packing(void);
 
 /*
  * Optimise SD flags for power savings:
diff --git a/include/linux/topology.h b/include/linux/topology.h
index b480403..eb09cd4 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -168,6 +168,7 @@ int arch_update_cpu_topology(void);
                                | 0*SD_SHARE_CPUPOWER                   \
                                | 0*SD_SHARE_PKG_RESOURCES              \
                                | 0*SD_SERIALIZE                        \
+                               | arch_sd_sibling_asym_packing()        \
                                | sd_balance_for_package_power()        \
                                | sd_power_saving_flags()               \
                                ,                                       \
--
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