diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/irq.c | 22 | ||||
| -rw-r--r-- | arch/arm/kernel/perf_event_v7.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/smp.c | 1 |
4 files changed, 24 insertions, 5 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 698b6f636156..20ab1e607522 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -63,7 +63,27 @@ int arch_show_interrupts(struct seq_file *p, int prec) */ void handle_IRQ(unsigned int irq, struct pt_regs *regs) { - __handle_domain_irq(NULL, irq, false, regs); + struct pt_regs *old_regs = set_irq_regs(regs); + struct irq_desc *desc; + + irq_enter(); + + /* + * Some hardware gives randomly wrong interrupts. Rather + * than crashing, do something sensible. + */ + if (unlikely(!irq || irq >= nr_irqs)) + desc = NULL; + else + desc = irq_to_desc(irq); + + if (likely(desc)) + handle_irq_desc(desc); + else + ack_bad_irq(irq); + + irq_exit(); + set_irq_regs(old_regs); } /* diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c index 2924d7910b10..eb2190477da1 100644 --- a/arch/arm/kernel/perf_event_v7.c +++ b/arch/arm/kernel/perf_event_v7.c @@ -773,10 +773,10 @@ static inline void armv7pmu_write_counter(struct perf_event *event, u64 value) pr_err("CPU%u writing wrong counter %d\n", smp_processor_id(), idx); } else if (idx == ARMV7_IDX_CYCLE_COUNTER) { - asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); + asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" ((u32)value)); } else { armv7_pmnc_select_counter(idx); - asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (value)); + asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" ((u32)value)); } } diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 6324f4db9b02..fc9e8b37eaa8 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -288,7 +288,7 @@ unsigned long get_wchan(struct task_struct *p) struct stackframe frame; unsigned long stack_page; int count = 0; - if (!p || p == current || p->state == TASK_RUNNING) + if (!p || p == current || task_is_running(p)) return 0; frame.fp = thread_saved_fp(p); diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 74679240a9d8..c7bb168b0d97 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -432,7 +432,6 @@ asmlinkage void secondary_start_kernel(void) #endif pr_debug("CPU%u: Booted secondary processor\n", cpu); - preempt_disable(); trace_hardirqs_off(); /* |