summaryrefslogtreecommitdiffstats
path: root/arch/powerpc
diff options
context:
space:
mode:
authorMilton Miller <miltonm@bga.com>2011-05-10 19:29:17 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-19 15:30:53 +1000
commit3caba98fddd551ca7dcdb1eb701b36ed70b04fde (patch)
tree85239e83532cd2b800e2c161bfb712961d7991a0 /arch/powerpc
parentf1072939b6dd01d038d47db0bdc01b33e5f90f28 (diff)
downloadblackbird-op-linux-3caba98fddd551ca7dcdb1eb701b36ed70b04fde.tar.gz
blackbird-op-linux-3caba98fddd551ca7dcdb1eb701b36ed70b04fde.zip
powerpc/mpic: Simplify ipi cpu mask handling
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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/sysdev/mpic.c24
1 files changed, 11 insertions, 13 deletions
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 68ea50c41902..53121f625068 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -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)
OpenPOWER on IntegriCloud