From 9b6695a8adfe0916e81ddd810a5b9db3eb8b0e46 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 23 Feb 2006 12:23:27 +0000
Subject: [MIPS] SMP: Fix initialization order bug.
A recent change requires cpu_possible_map to be initialized before
smp_sched_init() but most MIPS platforms were initializing their
processors in the prom_prepare_cpus callback of smp_prepare_cpus. The
simple fix of calling prom_prepare_cpus from one of the earlier SMP
initialization hooks doesn't work well either since IPIs may require
init_IRQ() to have completed, so bit the bullet and split
prom_prepare_cpus into two initialization functions, plat_smp_setup
which is called early from setup_arch and plat_prepare_cpus called where
prom_prepare_cpus used to be called.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/sibyte/cfe/smp.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
(limited to 'arch/mips/sibyte/cfe')
diff --git a/arch/mips/sibyte/cfe/smp.c b/arch/mips/sibyte/cfe/smp.c
index 4477af3d807..eab20e2db32 100644
--- a/arch/mips/sibyte/cfe/smp.c
+++ b/arch/mips/sibyte/cfe/smp.c
@@ -31,7 +31,7 @@
*
* Common setup before any secondaries are started
*/
-void __init prom_prepare_cpus(unsigned int max_cpus)
+void __init plat_smp_setup(void)
{
int i, num;
@@ -40,14 +40,18 @@ void __init prom_prepare_cpus(unsigned int max_cpus)
__cpu_number_map[0] = 0;
__cpu_logical_map[0] = 0;
- for (i=1, num=0; i<NR_CPUS; i++) {
+ for (i = 1, num = 0; i < NR_CPUS; i++) {
if (cfe_cpu_stop(i) == 0) {
cpu_set(i, phys_cpu_present_map);
__cpu_number_map[i] = ++num;
__cpu_logical_map[num] = i;
}
}
- printk("Detected %i available secondary CPU(s)\n", num);
+ printk(KERN_INFO "Detected %i available secondary CPU(s)\n", num);
+}
+
+void __init plat_prepare_cpus(unsigned int max_cpus)
+{
}
/*
--
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