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powerpc/mpic: Simplify ipi cpu mask handling

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Now that MSG_ALL and MSG_ALL_BUT_SELF have been eliminated,
smp_mpic_mesage_pass no longer needs to lookup the cpumask just to
have mpic_send_ipi extract part of it and recode it in a NR_CPUS loop
by mpic_physmask.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller 2011-05-10 19:29:17 +00:00 committed by Benjamin Herrenschmidt
parent f1072939b6
commit 3caba98fdd
1 changed files with 11 additions and 13 deletions
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24
arch/powerpc/sysdev/mpic.c
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@ -1613,30 +1613,28 @@ void mpic_request_ipis(void)
}
}
static void mpic_send_ipi(unsigned int ipi_no, const struct cpumask *cpu_mask)
void smp_mpic_message_pass(int cpu, int msg)
{
struct mpic *mpic = mpic_primary;
u32 physmask;
BUG_ON(mpic == NULL);
#ifdef DEBUG_IPI
DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
#endif
mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
mpic_physmask(cpumask_bits(cpu_mask)[0]));
}
void smp_mpic_message_pass(int cpu, int msg)
{
/* make sure we're sending something that translates to an IPI */
if ((unsigned int)msg > 3) {
printk("SMP %d: smp_message_pass: unknown msg %d\n",
smp_processor_id(), msg);
return;
}
mpic_send_ipi(msg, cpumask_of(cpu));
#ifdef DEBUG_IPI
DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, msg);
#endif
physmask = 1 << get_hard_smp_processor_id(cpu);
mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
msg * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE), physmask);
}
int __init smp_mpic_probe(void)