MIPS SMP code currently assumes that the boot CPU will be CPU0
of the system. For some systems, this may not be the case.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Tomaso Paoletti <tpaoletti@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Paul Gortmaker <Paul.Gortmaker@xxxxxxxxxxxxx>
---
arch/mips/Kconfig | 4 ++++
arch/mips/kernel/smp.c | 2 ++
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 653574b..7ff95fb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -747,6 +747,10 @@ config HOTPLUG_CPU
bool
default n
+config MIPS_DISABLE_BOOT_CPU_ZERO
+ bool
+ default n
+
config I8259
bool
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index b79ea70..e2597ef 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -195,12 +195,14 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
/* preload SMP state for boot cpu */
void __devinit smp_prepare_boot_cpu(void)
{
+#ifndef MIPS_DISABLE_BOOT_CPU_ZERO
/*
* This assumes that bootup is always handled by the processor
* with the logic and physical number 0.
*/
__cpu_number_map[0] = 0;
__cpu_logical_map[0] = 0;
+#endif
cpu_set(0, phys_cpu_present_map);
cpu_set(0, cpu_online_map);
cpu_set(0, cpu_callin_map);
--
1.5.6.5
