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powerpc/pseries: Fix VPHN build errors on non-SMP systems

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The header asm/hvcall.h was previously included indirectly via
smp.h. On non-SMP systems, however, these declarations are excluded
and the build breaks. This is easily fixed by including asm/hvcall.h
directly.

The VPHN feature is only meaningful on NUMA systems that implement
the SPLPAR option, so exclude the VPHN code on systems without
SPLPAR enabled.

Also, expose unmap_cpu_from_node() on systems with SPLPAR enabled,
even if CONFIG_HOTPLUG_CPU is disabled.

Lastly, map_cpu_to_node() is now needed by VPHN to manipulate the
node masks after boot time, so remove the __cpuinit annotation to
fix a section mismatch.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
This commit is contained in:
Jesse Larrew
2010-12-17 22:07:47 +00:00
committed by Benjamin Herrenschmidt
parent eed0ba0b4a
commit 39bf990ead
2 changed files with 17 additions and 12 deletions
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9
arch/powerpc/mm/numa.c
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@@ -28,6 +28,7 @@
#include <asm/smp.h>
#include <asm/firmware.h>
#include <asm/paca.h>
#include <asm/hvcall.h>
static int numa_enabled = 1;
@@ -167,7 +168,7 @@ static void __init get_node_active_region(unsigned long start_pfn,
work_with_active_regions(nid, get_active_region_work_fn, node_ar);
}
static void __cpuinit map_cpu_to_node(int cpu, int node)
static void map_cpu_to_node(int cpu, int node)
{
numa_cpu_lookup_table[cpu] = node;
@@ -177,7 +178,7 @@ static void __cpuinit map_cpu_to_node(int cpu, int node)
cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
}
#ifdef CONFIG_HOTPLUG_CPU
#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PPC_SPLPAR)
static void unmap_cpu_from_node(unsigned long cpu)
{
int node = numa_cpu_lookup_table[cpu];
@@ -191,7 +192,7 @@ static void unmap_cpu_from_node(unsigned long cpu)
cpu, node);
}
}
#endif /* CONFIG_HOTPLUG_CPU */
#endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */
/* must hold reference to node during call */
static const int *of_get_associativity(struct device_node *dev)
@@ -1289,6 +1290,7 @@ u64 memory_hotplug_max(void)
#endif /* CONFIG_MEMORY_HOTPLUG */
/* Vrtual Processor Home Node (VPHN) support */
#ifdef CONFIG_PPC_SPLPAR
#define VPHN_NR_CHANGE_CTRS (8)
static u8 vphn_cpu_change_counts[NR_CPUS][VPHN_NR_CHANGE_CTRS];
static cpumask_t cpu_associativity_changes_mask;
@@ -1531,3 +1533,4 @@ int stop_topology_update(void)
vphn_enabled = 0;
return del_timer_sync(&topology_timer);
}
#endif /* CONFIG_PPC_SPLPAR */