On 08/20/2014 10:41 PM, Soren Brinkmann wrote:
The hotplug code contains only a single function, which is an SMP
function. Move that to platsmp.c where all other SMP runctions reside.
That allows removing hotplug.c and declaring the cpu_die function
static.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
---
arch/arm/mach-zynq/Makefile | 1 -
arch/arm/mach-zynq/common.h | 3 +--
arch/arm/mach-zynq/hotplug.c | 17 -----------------
arch/arm/mach-zynq/platsmp.c | 18 ++++++++++++++++++
4 files changed, 19 insertions(+), 20 deletions(-)
diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile
index 820dff6e1eba..c85fb3f7d5cd 100644
--- a/arch/arm/mach-zynq/Makefile
+++ b/arch/arm/mach-zynq/Makefile
@@ -6,5 +6,4 @@
obj-y := common.o slcr.o pm.o
CFLAGS_REMOVE_hotplug.o =-march=armv6k
CFLAGS_hotplug.o =-Wa,-march=armv7-a -mcpu=cortex-a9
-obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
obj-$(CONFIG_SMP) += headsmp.o platsmp.o
diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h
index c0773e87e83c..e6bb12c50a23 100644
--- a/arch/arm/mach-zynq/common.h
+++ b/arch/arm/mach-zynq/common.h
@@ -39,8 +39,7 @@ extern struct smp_operations zynq_smp_ops __initdata;
extern void __iomem *zynq_scu_base;
-/* Hotplug */
-extern void zynq_platform_cpu_die(unsigned int cpu);
+int zynq_pm_late_init(void);
int zynq_pm_late_init(void);
diff --git a/arch/arm/mach-zynq/hotplug.c b/arch/arm/mach-zynq/hotplug.c
index fe44a05677e2..b685c89f11e4 100644
--- a/arch/arm/mach-zynq/hotplug.c
+++ b/arch/arm/mach-zynq/hotplug.c
@@ -12,20 +12,3 @@
*/
#include <asm/proc-fns.h>
-/*
- * platform-specific code to shutdown a CPU
- *
- * Called with IRQs disabled
- */
-void zynq_platform_cpu_die(unsigned int cpu)
-{
- zynq_slcr_cpu_state_write(cpu, true);
-
- /*
- * there is no power-control hardware on this platform, so all
- * we can do is put the core into WFI; this is safe as the calling
- * code will have already disabled interrupts
- */
- for (;;)
- cpu_do_idle();
-}
diff --git a/arch/arm/mach-zynq/platsmp.c b/arch/arm/mach-zynq/platsmp.c
index f77f7ca4c45b..04e578718aa2 100644
--- a/arch/arm/mach-zynq/platsmp.c
+++ b/arch/arm/mach-zynq/platsmp.c
@@ -132,6 +132,24 @@ static int zynq_cpu_kill(unsigned cpu)
zynq_slcr_cpu_stop(cpu);
return 1;
}
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+static void zynq_platform_cpu_die(unsigned int cpu)
+{
+ zynq_slcr_cpu_state_write(cpu, true);
+
+ /*
+ * there is no power-control hardware on this platform, so all
+ * we can do is put the core into WFI; this is safe as the calling
+ * code will have already disabled interrupts
+ */
+ for (;;)
+ cpu_do_idle();
IIUC, the cpu_do_idle() will flush the L1 cache and then call the WFI.
It makes sense if we are about to power down the core. So I am wondering
if we can just call wfi() instead.
+}
#endif
struct smp_operations zynq_smp_ops __initdata = {
--
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