From: Steven Miao <realmz6@gmail.com>
Date: Tue, 2 Aug 2011 09:50:41 +0000 (+0800)
Subject: Blackfin: SMP: fix scheduling deadlock
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0b2b06efd81ceb1630babcf2990f9577a17c132f;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Blackfin: SMP: fix scheduling deadlock

Make sure our smp_send_reschedule() implementation matches the
scheduler_ipi() callback so that it can kick the idle cpu.

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 107622aacf6b..0784a52389c8 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -295,10 +295,15 @@ EXPORT_SYMBOL_GPL(smp_call_function_single);
 
 void smp_send_reschedule(int cpu)
 {
+	cpumask_t callmap;
 	/* simply trigger an ipi */
 	if (cpu_is_offline(cpu))
 		return;
-	platform_send_ipi_cpu(cpu, IRQ_SUPPLE_0);
+
+	cpumask_clear(&callmap);
+	cpumask_set_cpu(cpu, &callmap);
+
+	smp_send_message(callmap, BFIN_IPI_RESCHEDULE, NULL, NULL, 0);
 
 	return;
 }