diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/irq.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/kprobes-test-arm.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/machine_kexec.c | 7 | ||||
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/sched_clock.c | 18 | ||||
| -rw-r--r-- | arch/arm/kernel/smp.c | 14 | ||||
| -rw-r--r-- | arch/arm/kernel/smp_twd.c | 4 |
7 files changed, 29 insertions, 24 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 16cedb42c0c..896165096d6 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -34,6 +34,7 @@ #include <linux/list.h> #include <linux/kallsyms.h> #include <linux/proc_fs.h> +#include <linux/export.h> #include <asm/exception.h> #include <asm/mach/arch.h> @@ -109,6 +110,7 @@ void set_irq_flags(unsigned int irq, unsigned int iflags) /* Order is clear bits in "clr" then set bits in "set" */ irq_modify_status(irq, clr, set & ~clr); } +EXPORT_SYMBOL_GPL(set_irq_flags); void __init init_IRQ(void) { diff --git a/arch/arm/kernel/kprobes-test-arm.c b/arch/arm/kernel/kprobes-test-arm.c index 38c1a3b103a..83931290506 100644 --- a/arch/arm/kernel/kprobes-test-arm.c +++ b/arch/arm/kernel/kprobes-test-arm.c @@ -366,7 +366,9 @@ void kprobe_arm_test_cases(void) TEST_UNSUPPORTED(".word 0xe04f0392 @ umaal r0, pc, r2, r3") TEST_UNSUPPORTED(".word 0xe0500090 @ undef") TEST_UNSUPPORTED(".word 0xe05fff9f @ undef") +#endif +#if __LINUX_ARM_ARCH__ >= 7 TEST_RRR( "mls r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") TEST_RRR( "mlshi r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") TEST_RR( "mls lr, r",1, VAL2,", r",2, VAL3,", r13") @@ -456,6 +458,8 @@ void kprobe_arm_test_cases(void) TEST_UNSUPPORTED(".word 0xe1700090") /* Unallocated space */ #if __LINUX_ARM_ARCH__ >= 6 TEST_UNSUPPORTED("ldrex r2, [sp]") +#endif +#if (__LINUX_ARM_ARCH__ >= 7) || defined(CONFIG_CPU_32v6K) TEST_UNSUPPORTED("strexd r0, r2, r3, [sp]") TEST_UNSUPPORTED("ldrexd r2, r3, [sp]") TEST_UNSUPPORTED("strexb r0, r2, [sp]") diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c index e29c3337ca8..8ef8c933780 100644 --- a/arch/arm/kernel/machine_kexec.c +++ b/arch/arm/kernel/machine_kexec.c @@ -45,10 +45,9 @@ int machine_kexec_prepare(struct kimage *image) for (i = 0; i < image->nr_segments; i++) { current_segment = &image->segment[i]; - err = memblock_is_region_memory(current_segment->mem, - current_segment->memsz); - if (err) - return - EINVAL; + if (!memblock_is_region_memory(current_segment->mem, + current_segment->memsz)) + return -EINVAL; err = get_user(header, (__be32*)current_segment->buf); if (err) diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 93971b1a4f0..53c0304b734 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -96,6 +96,10 @@ armpmu_event_set_period(struct perf_event *event, s64 period = hwc->sample_period; int ret = 0; + /* The period may have been changed by PERF_EVENT_IOC_PERIOD */ + if (unlikely(period != hwc->last_period)) + left = period - (hwc->last_period - left); + if (unlikely(left <= -period)) { left = period; local64_set(&hwc->period_left, left); diff --git a/arch/arm/kernel/sched_clock.c b/arch/arm/kernel/sched_clock.c index e21bac20d90..fc6692e2b60 100644 --- a/arch/arm/kernel/sched_clock.c +++ b/arch/arm/kernel/sched_clock.c @@ -107,13 +107,6 @@ static void sched_clock_poll(unsigned long wrap_ticks) update_sched_clock(); } -void __init setup_sched_clock_needs_suspend(u32 (*read)(void), int bits, - unsigned long rate) -{ - setup_sched_clock(read, bits, rate); - cd.needs_suspend = true; -} - void __init setup_sched_clock(u32 (*read)(void), int bits, unsigned long rate) { unsigned long r, w; @@ -189,18 +182,15 @@ void __init sched_clock_postinit(void) static int sched_clock_suspend(void) { sched_clock_poll(sched_clock_timer.data); - if (cd.needs_suspend) - cd.suspended = true; + cd.suspended = true; return 0; } static void sched_clock_resume(void) { - if (cd.needs_suspend) { - cd.epoch_cyc = read_sched_clock(); - cd.epoch_cyc_copy = cd.epoch_cyc; - cd.suspended = false; - } + cd.epoch_cyc = read_sched_clock(); + cd.epoch_cyc_copy = cd.epoch_cyc; + cd.suspended = false; } static struct syscore_ops sched_clock_ops = { diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 8e20754dd31..fbc8b2623d8 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -294,18 +294,24 @@ static void percpu_timer_setup(void); asmlinkage void __cpuinit secondary_start_kernel(void) { struct mm_struct *mm = &init_mm; - unsigned int cpu = smp_processor_id(); + unsigned int cpu; + + /* + * The identity mapping is uncached (strongly ordered), so + * switch away from it before attempting any exclusive accesses. + */ + cpu_switch_mm(mm->pgd, mm); + enter_lazy_tlb(mm, current); + local_flush_tlb_all(); /* * All kernel threads share the same mm context; grab a * reference and switch to it. */ + cpu = smp_processor_id(); atomic_inc(&mm->mm_count); current->active_mm = mm; cpumask_set_cpu(cpu, mm_cpumask(mm)); - cpu_switch_mm(mm->pgd, mm); - enter_lazy_tlb(mm, current); - local_flush_tlb_all(); printk("CPU%u: Booted secondary processor\n", cpu); diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c index e1f906989bb..b22d700fea2 100644 --- a/arch/arm/kernel/smp_twd.c +++ b/arch/arm/kernel/smp_twd.c @@ -42,10 +42,10 @@ static void twd_set_mode(enum clock_event_mode mode, switch (mode) { case CLOCK_EVT_MODE_PERIODIC: - /* timer load already set up */ ctrl = TWD_TIMER_CONTROL_ENABLE | TWD_TIMER_CONTROL_IT_ENABLE | TWD_TIMER_CONTROL_PERIODIC; - __raw_writel(twd_timer_rate / HZ, twd_base + TWD_TIMER_LOAD); + __raw_writel(DIV_ROUND_CLOSEST(twd_timer_rate, HZ), + twd_base + TWD_TIMER_LOAD); break; case CLOCK_EVT_MODE_ONESHOT: /* period set, and timer enabled in 'next_event' hook */ |