diff options
| author | Milton Miller <miltonm@bga.com> | 2011-05-10 19:28:52 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-19 04:30:44 (GMT) |
| commit | 2cd947f1757fb937806535be13caf2ddd813d60b (patch) | |
| tree | 7c965799f1662e104053ab637666e9efd06d623f | |
| parent | 8657ae28ddd34db0f52b0730a6a25992c0173264 (diff) | |
| download | linux-2cd947f1757fb937806535be13caf2ddd813d60b.tar.xz | |
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>
| -rw-r--r-- | arch/powerpc/kernel/paca.c | 17 | ||||
| -rw-r--r-- | arch/powerpc/platforms/iseries/setup.c | 5 |
2 files changed, 11 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 102244e..efeb881 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); } diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c index 81cb8d2..c25a081 100644 --- a/arch/powerpc/platforms/iseries/setup.c +++ b/arch/powerpc/platforms/iseries/setup.c @@ -685,6 +685,11 @@ void * __init iSeries_early_setup(void) powerpc_firmware_features |= FW_FEATURE_ISERIES; powerpc_firmware_features |= FW_FEATURE_LPAR; +#ifdef CONFIG_SMP + /* On iSeries we know we can never have more than 64 cpus */ + nr_cpu_ids = max(nr_cpu_ids, 64); +#endif + iSeries_fixup_klimit(); /* |