ARM: shmobile: Introduce shmobile_smp_cpu_disable()

Introduce the shared CPU Hotplug function shmobile_smp_cpu_disable()
for mach-shmobile. It is useful for the case when all CPUs may be
hotplugged, including CPU 0.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 7b938681e7569d29231b232d2be8f46d81f6be39..1ed155eb3e927ec2e968f3dbdcd1b425cc3998e5 100644 (file)
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -13,6 +13,7 @@ extern void shmobile_smp_boot(void);
 extern void shmobile_smp_sleep(void);
 extern void shmobile_smp_hook(unsigned int cpu, unsigned long fn,
                              unsigned long arg);
+extern int shmobile_smp_cpu_disable(unsigned int cpu);
 extern void shmobile_boot_scu(void);
 extern void shmobile_smp_scu_prepare_cpus(unsigned int max_cpus);
 extern int shmobile_smp_scu_boot_secondary(unsigned int cpu,

diff --git a/arch/arm/mach-shmobile/platsmp.c b/arch/arm/mach-shmobile/platsmp.c
index d4ae616bcedb4f09c4342a8e19a0d9c7dc98f581..3741562156edcf10b47567b38d2267d49b0e2cf0 100644 (file)
--- a/arch/arm/mach-shmobile/platsmp.c
+++ b/arch/arm/mach-shmobile/platsmp.c
@@ -44,3 +44,10 @@ void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg)
        shmobile_smp_arg[cpu] = arg;
        flush_cache_all();
 }
+
+#ifdef CONFIG_HOTPLUG_CPU
+int shmobile_smp_cpu_disable(unsigned int cpu)
+{
+       return 0; /* Hotplug of any CPU is supported */
+}
+#endif