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authorRich Felker <dalias@libc.org>2016-02-12 22:05:11 +0000
committerRich Felker <dalias@libc.org>2016-03-17 19:46:09 +0000
commit45624ac38926c8c2f1a63b4a39e7b1997743e1b3 (patch)
tree75b4a24dd31fc8a6101985f5f7d6ba865de00e54 /arch/sh/kernel
parent5f2cb34d034fab41dfaabb4403af6e83e04f30df (diff)
downloadlinux-45624ac38926c8c2f1a63b4a39e7b1997743e1b3.tar.bz2
sh: remove arch-specific localtimer and use generic one
The code being removed was copied from arm, where the corresponding code was removed in 2013. The only functional change should be that the rating of the dummy local timer changes from 400 to 100. Signed-off-by: Rich Felker <dalias@libc.org>
Diffstat (limited to 'arch/sh/kernel')
-rw-r--r--arch/sh/kernel/Makefile1
-rw-r--r--arch/sh/kernel/localtimer.c60
-rw-r--r--arch/sh/kernel/smp.c16
3 files changed, 7 insertions, 70 deletions
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 2ccf36c824c6..09040fd07d2e 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -46,6 +46,5 @@ obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
-obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += localtimer.o
ccflags-y := -Werror
diff --git a/arch/sh/kernel/localtimer.c b/arch/sh/kernel/localtimer.c
deleted file mode 100644
index cbb7d4636ec0..000000000000
--- a/arch/sh/kernel/localtimer.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Dummy local timer
- *
- * Copyright (C) 2008 Paul Mundt
- *
- * cloned from:
- *
- * linux/arch/arm/mach-realview/localtimer.c
- *
- * Copyright (C) 2002 ARM Ltd.
- * All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/smp.h>
-#include <linux/jiffies.h>
-#include <linux/percpu.h>
-#include <linux/clockchips.h>
-#include <linux/hardirq.h>
-#include <linux/irq.h>
-
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-
-/*
- * Used on SMP for either the local timer or SMP_MSG_TIMER
- */
-void local_timer_interrupt(void)
-{
- struct clock_event_device *clk = this_cpu_ptr(&local_clockevent);
-
- irq_enter();
- clk->event_handler(clk);
- irq_exit();
-}
-
-void local_timer_setup(unsigned int cpu)
-{
- struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-
- clk->name = "dummy_timer";
- clk->features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_DUMMY;
- clk->rating = 400;
- clk->mult = 1;
- clk->broadcast = smp_timer_broadcast;
- clk->cpumask = cpumask_of(cpu);
-
- clockevents_register_device(clk);
-}
-
-void local_timer_stop(unsigned int cpu)
-{
-}
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index a66f2aa53dac..cbfb98802378 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -22,6 +22,7 @@
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/atomic.h>
+#include <linux/clockchips.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
@@ -141,11 +142,6 @@ int __cpu_disable(void)
migrate_irqs();
/*
- * Stop the local timer for this CPU.
- */
- local_timer_stop(cpu);
-
- /*
* Flush user cache and TLB mappings, and then remove this CPU
* from the vm mask set of all processes.
*/
@@ -198,8 +194,6 @@ asmlinkage void start_secondary(void)
local_irq_enable();
- /* Enable local timers */
- local_timer_setup(cpu);
calibrate_delay();
smp_store_cpu_info(cpu);
@@ -289,7 +283,8 @@ void arch_send_call_function_single_ipi(int cpu)
mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
}
-void smp_timer_broadcast(const struct cpumask *mask)
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
+void tick_broadcast(const struct cpumask *mask)
{
int cpu;
@@ -300,9 +295,10 @@ void smp_timer_broadcast(const struct cpumask *mask)
static void ipi_timer(void)
{
irq_enter();
- local_timer_interrupt();
+ tick_receive_broadcast();
irq_exit();
}
+#endif
void smp_message_recv(unsigned int msg)
{
@@ -316,9 +312,11 @@ void smp_message_recv(unsigned int msg)
case SMP_MSG_FUNCTION_SINGLE:
generic_smp_call_function_single_interrupt();
break;
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
case SMP_MSG_TIMER:
ipi_timer();
break;
+#endif
default:
printk(KERN_WARNING "SMP %d: %s(): unknown IPI %d\n",
smp_processor_id(), __func__, msg);