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authorMilton Miller <miltonm@bga.com>2011-05-10 21:28:52 +0200
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-19 06:30:44 +0200
commit2cd947f1757fb937806535be13caf2ddd813d60b (patch)
tree7c965799f1662e104053ab637666e9efd06d623f /arch/powerpc/kernel/paca.c
parentpowerpc: Respect nr_cpu_ids when calling set_cpu_possible and set_cpu_present (diff)
downloadlinux-2cd947f1757fb937806535be13caf2ddd813d60b.tar.xz
linux-2cd947f1757fb937806535be13caf2ddd813d60b.zip
powerpc: Use nr_cpu_ids in initial paca allocation
Now that we never set a cpu above nr_cpu_ids possible we can limit our initial paca allocation to nr_cpu_ids. We can then clamp the number of cpus in platforms/iseries/setup.c. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/paca.c')
-rw-r--r--arch/powerpc/kernel/paca.c17
1 files changed, 6 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 102244edecf0..efeb88184182 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -7,7 +7,7 @@
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/threads.h>
+#include <linux/smp.h>
#include <linux/module.h>
#include <linux/memblock.h>
@@ -178,7 +178,7 @@ static int __initdata paca_size;
void __init allocate_pacas(void)
{
- int nr_cpus, cpu, limit;
+ int cpu, limit;
/*
* We can't take SLB misses on the paca, and we want to access them
@@ -190,23 +190,18 @@ void __init allocate_pacas(void)
if (firmware_has_feature(FW_FEATURE_ISERIES))
limit = min(limit, HvPagesToMap * HVPAGESIZE);
- nr_cpus = NR_CPUS;
- /* On iSeries we know we can never have more than 64 cpus */
- if (firmware_has_feature(FW_FEATURE_ISERIES))
- nr_cpus = min(64, nr_cpus);
-
- paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpus);
+ paca_size = PAGE_ALIGN(sizeof(struct paca_struct) * nr_cpu_ids);
paca = __va(memblock_alloc_base(paca_size, PAGE_SIZE, limit));
memset(paca, 0, paca_size);
printk(KERN_DEBUG "Allocated %u bytes for %d pacas at %p\n",
- paca_size, nr_cpus, paca);
+ paca_size, nr_cpu_ids, paca);
- allocate_lppacas(nr_cpus, limit);
+ allocate_lppacas(nr_cpu_ids, limit);
/* Can't use for_each_*_cpu, as they aren't functional yet */
- for (cpu = 0; cpu < nr_cpus; cpu++)
+ for (cpu = 0; cpu < nr_cpu_ids; cpu++)
initialise_paca(&paca[cpu], cpu);
}