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[PATCH] alpha: set cpu_possible_map much earlier

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All the percpu data structure walkers want cpu_possible_map to be
initialized early, but alpha instead populated "hwrpb_cpu_present_mask"
early in setup_smp(), and then initialized cpu_possible_map only much
later.

Thanks go to Heiko Carstens and Dipankar Sarma for noticing.

This fixes it and we can get rid of hwrpb_cpu_present_mask entirely.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ivan Kokshaysky 2006-02-08 11:55:06 +03:00 committed by Linus Torvalds
parent 9934a7939e
commit 328c2a8a39
1 changed files with 4 additions and 21 deletions
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25
arch/alpha/kernel/smp.c
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@ -73,9 +73,6 @@ cpumask_t cpu_online_map;
EXPORT_SYMBOL(cpu_online_map);
/* cpus reported in the hwrpb */
static unsigned long hwrpb_cpu_present_mask __initdata = 0;
int smp_num_probed; /* Internal processor count */
int smp_num_cpus = 1; /* Number that came online. */
@ -442,7 +439,7 @@ setup_smp(void)
if ((cpu->flags & 0x1cc) == 0x1cc) {
smp_num_probed++;
/* Assume here that "whami" == index */
hwrpb_cpu_present_mask |= (1UL << i);
cpu_set(i, cpu_possible_map);
cpu->pal_revision = boot_cpu_palrev;
}
@ -453,12 +450,12 @@ setup_smp(void)
}
} else {
smp_num_probed = 1;
hwrpb_cpu_present_mask = (1UL << boot_cpuid);
cpu_set(boot_cpuid, cpu_possible_map);
}
cpu_present_mask = cpumask_of_cpu(boot_cpuid);
printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_mask = %lx\n",
smp_num_probed, hwrpb_cpu_present_mask);
smp_num_probed, cpu_possible_map.bits[0]);
}
/*
@ -467,8 +464,6 @@ setup_smp(void)
void __init
smp_prepare_cpus(unsigned int max_cpus)
{
int cpu_count, i;
/* Take care of some initial bookkeeping. */
memset(ipi_data, 0, sizeof(ipi_data));
@ -486,19 +481,7 @@ smp_prepare_cpus(unsigned int max_cpus)
printk(KERN_INFO "SMP starting up secondaries.\n");
cpu_count = 1;
for (i = 0; (i < NR_CPUS) && (cpu_count < max_cpus); i++) {
if (i == boot_cpuid)
continue;
if (((hwrpb_cpu_present_mask >> i) & 1) == 0)
continue;
cpu_set(i, cpu_possible_map);
cpu_count++;
}
smp_num_cpus = cpu_count;
smp_num_cpus = smp_num_probed;
}
void __devinit