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[01/14] ARM: shmobile: Introduce shmobile_smp_cpu_disable()

Message ID 5c4dfcd663b6e96cc20f02dc2c7c315749ea1bc1.1380532277.git.horms+renesas@verge.net.au (mailing list archive)
State Accepted
Commit 5c4dfcd663b6e96cc20f02dc2c7c315749ea1bc1
Headers show

Commit Message

Simon Horman Oct. 1, 2013, 2:35 a.m. UTC 
From: Magnus Damm <damm@opensource.se>

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>
---
 arch/arm/mach-shmobile/include/mach/common.h | 1 +
 arch/arm/mach-shmobile/platsmp.c             | 7 +++++++
 2 files changed, 8 insertions(+)
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Patch

diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 7b93868..1ed155e 100644
--- 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 d4ae616..3741562 100644
--- 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