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[IA64] Fix build breakage

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In commit 0ac0c0d0f8
cpusets: randomize node rotor used in cpuset_mem_spread_node()

Jack Steiner fixed a problem with too many small tasks being
assigned to node 0. Copy his code to ia64 to avoid build error.

    arch/ia64/kernel/smpboot.c:641: error: ‘cpu_to_node_map’ undeclared (first use in this function)

In commit 3bccd99627
numa: ia64: use generic percpu var numa_node_id() implementation

Lee Schermerhorn added some set_numa_node() calls - but these
only work on CONFIG_NUMA=y configurations. Surround the calls
with #ifdef CONFIG_NUMA

Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Tony Luck 2010-05-27 15:35:13 -07:00
parent cc106eb35e
commit 4ec37de89d
2 changed files with 21 additions and 0 deletions
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4
arch/ia64/kernel/smpboot.c
View File

@ -390,11 +390,13 @@ smp_callin (void)
fix_b0_for_bsp();
#ifdef CONFIG_NUMA
/*
* numa_node_id() works after this.
*/
set_numa_node(cpu_to_node_map[cpuid]);
set_numa_mem(local_memory_node(cpu_to_node_map[cpuid]));
#endif
ipi_call_lock_irq();
spin_lock(&vector_lock);
@ -638,7 +640,9 @@ void __devinit smp_prepare_boot_cpu(void)
{
cpu_set(smp_processor_id(), cpu_online_map);
cpu_set(smp_processor_id(), cpu_callin_map);
#ifdef CONFIG_NUMA
set_numa_node(cpu_to_node_map[smp_processor_id()]);
#endif
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
paravirt_post_smp_prepare_boot_cpu();
}

17
arch/ia64/mm/numa.c
View File

@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/module.h>
#include <linux/random.h>
#include <asm/mmzone.h>
#include <asm/numa.h>
@ -50,6 +51,22 @@ paddr_to_nid(unsigned long paddr)
return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
}
/*
* Return the bit number of a random bit set in the nodemask.
* (returns -1 if nodemask is empty)
*/
int __node_random(const nodemask_t *maskp)
{
int w, bit = -1;
w = nodes_weight(*maskp);
if (w)
bit = bitmap_ord_to_pos(maskp->bits,
get_random_int() % w, MAX_NUMNODES);
return bit;
}
EXPORT_SYMBOL(__node_random);
#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
/*
* Because of holes evaluate on section limits.