ARM: 7571/1: SMP: add function arch_send_wakeup_ipi_mask()

Add function arch_send_wakeup_ipi_mask(), so that platform code can
use it as an easy way to wake up cores that are in WFI.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index 2e3be16c6766..d3a22bebe6ce 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -79,6 +79,7 @@ extern void cpu_die(void);
 
 extern void arch_send_call_function_single_ipi(int cpu);
 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
 
 struct smp_operations {
 #ifdef CONFIG_SMP
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 8e20754dd31d..dd5dd0248b88 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -415,6 +415,11 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
         smp_cross_call(mask, IPI_CALL_FUNC);
 }
 
+void arch_send_wakeup_ipi_mask(const struct cpumask *mask)
+{
+        smp_cross_call(mask, IPI_WAKEUP);
+}
+
 void arch_send_call_function_single_ipi(int cpu)
 {
         smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);