From 5f2cb34d034fab41dfaabb4403af6e83e04f30df Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 12 Feb 2016 22:11:55 +0000 Subject: sh: make MMU-specific SMP code conditional on CONFIG_MMU This is a prerequisite for adding NOMMU SMP support. Signed-off-by: Rich Felker --- arch/sh/kernel/smp.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/sh/kernel/smp.c') diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c index de6be008fc01..a66f2aa53dac 100644 --- a/arch/sh/kernel/smp.c +++ b/arch/sh/kernel/smp.c @@ -150,7 +150,9 @@ int __cpu_disable(void) * from the vm mask set of all processes. */ flush_cache_all(); +#ifdef CONFIG_MMU local_flush_tlb_all(); +#endif clear_tasks_mm_cpumask(cpu); @@ -183,8 +185,10 @@ asmlinkage void start_secondary(void) atomic_inc(&mm->mm_count); atomic_inc(&mm->mm_users); current->active_mm = mm; +#ifdef CONFIG_MMU enter_lazy_tlb(mm, current); local_flush_tlb_all(); +#endif per_cpu_trap_init(); @@ -328,6 +332,8 @@ int setup_profiling_timer(unsigned int multiplier) return 0; } +#ifdef CONFIG_MMU + static void flush_tlb_all_ipi(void *info) { local_flush_tlb_all(); @@ -467,3 +473,5 @@ void flush_tlb_one(unsigned long asid, unsigned long vaddr) smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1); local_flush_tlb_one(asid, vaddr); } + +#endif -- cgit v1.2.3 From 45624ac38926c8c2f1a63b4a39e7b1997743e1b3 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 12 Feb 2016 22:05:11 +0000 Subject: 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 --- arch/sh/Kconfig | 1 + arch/sh/kernel/Makefile | 1 - arch/sh/kernel/localtimer.c | 60 --------------------------------------------- arch/sh/kernel/smp.c | 16 ++++++------ 4 files changed, 8 insertions(+), 70 deletions(-) delete mode 100644 arch/sh/kernel/localtimer.c (limited to 'arch/sh/kernel/smp.c') diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index e13da05505dc..9aabc96aed03 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -1,5 +1,6 @@ config SUPERH def_bool y + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_MIGHT_HAVE_PC_PARPORT select HAVE_PATA_PLATFORM select CLKDEV_LOOKUP 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include - -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 #include #include +#include #include #include #include @@ -140,11 +141,6 @@ 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); -- cgit v1.2.3