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authorMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>2008-11-29 16:50:12 +0530
committerIngo Molnar <mingo@elte.hu>2008-12-01 08:44:00 +0100
commit43714539eab42b2fa3653ea7bd667b36c2291b11 (patch)
tree43de6a8062510c4014eb9343a5f164a79423e1ae /arch
parentd9d060a98ff89fe0f86e24c9c0c3d2f0c566781c (diff)
downloadop-kernel-dev-43714539eab42b2fa3653ea7bd667b36c2291b11.zip
op-kernel-dev-43714539eab42b2fa3653ea7bd667b36c2291b11.tar.gz
sched: don't export sched_mc_power_savings in laptops
Impact: do not expose a control that has no effect Fix to prevent sched_mc_power_saving from being exported through sysfs on single-socket systems. (Say multicore single socket (Laptop)) CPU core map of the boot cpu should be equal to possible number of cpus for single socket system. This fix has been developed at FOSS.in kernel workout. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/topology.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 4850e4b..ff386ff 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -239,7 +239,7 @@ struct pci_bus;
void set_pci_bus_resources_arch_default(struct pci_bus *b);
#ifdef CONFIG_SMP
-#define mc_capable() (boot_cpu_data.x86_max_cores > 1)
+#define mc_capable() (cpus_weight(per_cpu(cpu_core_map, 0)) != nr_cpu_ids)
#define smt_capable() (smp_num_siblings > 1)
#endif
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