[ARM] smp: fix cpumask usage in ARM SMP code

The ARM SMP code wasn't properly updated for the cpumask changes, which
results in smp_timer_broadcast() broadcasting ticks to non-online CPUs.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index c6884ba..3e1714c 100644 (file)
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -253,9 +253,9 @@ void __cpuinit gic_cpu_init(unsigned int gic_nr, void __iomem *base)
 }
 
 #ifdef CONFIG_SMP
-void gic_raise_softirq(cpumask_t cpumask, unsigned int irq)
+void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
 {
-       unsigned long map = *cpus_addr(cpumask);
+       unsigned long map = *cpus_addr(*mask);
 
        /* this always happens on GIC0 */
        writel(map << 16 | irq, gic_data[0].dist_base + GIC_DIST_SOFTINT);

diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
index 4924914..7f34333 100644 (file)
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -36,7 +36,7 @@
 void gic_dist_init(unsigned int gic_nr, void __iomem *base, unsigned int irq_start);
 void gic_cpu_init(unsigned int gic_nr, void __iomem *base);
 void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
-void gic_raise_softirq(cpumask_t cpumask, unsigned int irq);
+void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
 #endif
 
 #endif

diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index fad70da..5995935 100644 (file)
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -53,17 +53,12 @@ extern void smp_store_cpu_info(unsigned int cpuid);
 /*
  * Raise an IPI cross call on CPUs in callmap.
  */
-extern void smp_cross_call(cpumask_t callmap);
-
-/*
- * Broadcast a timer interrupt to the other CPUs.
- */
-extern void smp_send_timer(void);
+extern void smp_cross_call(const struct cpumask *mask);
 
 /*
  * Broadcast a clock event to other CPUs.
  */
-extern void smp_timer_broadcast(cpumask_t mask);
+extern void smp_timer_broadcast(const struct cpumask *mask);
 
 /*
  * Boot a secondary CPU, and assign it the specified idle task.
@@ -102,7 +97,8 @@ extern int platform_cpu_kill(unsigned int cpu);
 extern void platform_cpu_enable(unsigned int cpu);
 
 extern void arch_send_call_function_single_ipi(int cpu);
-extern void arch_send_call_function_ipi(cpumask_t mask);
+extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+#define arch_send_call_function_ipi_mask arch_send_call_function_ipi_mask
 
 /*
  * Local timer interrupt handling function (can be IPI'ed).

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 7801aac..6014dfd 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -326,14 +326,14 @@ void __init smp_prepare_boot_cpu(void)
        per_cpu(cpu_data, cpu).idle = current;
 }
 
-static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
+static void send_ipi_message(const struct cpumask *mask, enum ipi_msg_type msg)
 {
        unsigned long flags;
        unsigned int cpu;
 
        local_irq_save(flags);
 
-       for_each_cpu_mask(cpu, callmap) {
+       for_each_cpu(cpu, mask) {
                struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
 
                spin_lock(&ipi->lock);
@@ -344,19 +344,19 @@ static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
        /*
         * Call the platform specific cross-CPU call function.
         */
-       smp_cross_call(callmap);
+       smp_cross_call(mask);
 
        local_irq_restore(flags);
 }
 
-void arch_send_call_function_ipi(cpumask_t mask)
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 {
        send_ipi_message(mask, IPI_CALL_FUNC);
 }
 
 void arch_send_call_function_single_ipi(int cpu)
 {
-       send_ipi_message(cpumask_of_cpu(cpu), IPI_CALL_FUNC_SINGLE);
+       send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);
 }
 
 void show_ipi_list(struct seq_file *p)
@@ -498,17 +498,10 @@ asmlinkage void __exception do_IPI(struct pt_regs *regs)
 
 void smp_send_reschedule(int cpu)
 {
-       send_ipi_message(cpumask_of_cpu(cpu), IPI_RESCHEDULE);
+       send_ipi_message(cpumask_of(cpu), IPI_RESCHEDULE);
 }
 
-void smp_send_timer(void)
-{
-       cpumask_t mask = cpu_online_map;
-       cpu_clear(smp_processor_id(), mask);
-       send_ipi_message(mask, IPI_TIMER);
-}
-
-void smp_timer_broadcast(cpumask_t mask)
+void smp_timer_broadcast(const struct cpumask *mask)
 {
        send_ipi_message(mask, IPI_TIMER);
 }
@@ -517,7 +510,7 @@ void smp_send_stop(void)
 {
        cpumask_t mask = cpu_online_map;
        cpu_clear(smp_processor_id(), mask);
-       send_ipi_message(mask, IPI_CPU_STOP);
+       send_ipi_message(&mask, IPI_CPU_STOP);
 }
 
 /*
@@ -528,20 +521,17 @@ int setup_profiling_timer(unsigned int multiplier)
        return -EINVAL;
 }
 
-static int
-on_each_cpu_mask(void (*func)(void *), void *info, int wait, cpumask_t mask)
+static void
+on_each_cpu_mask(void (*func)(void *), void *info, int wait,
+               const struct cpumask *mask)
 {
-       int ret = 0;
-
        preempt_disable();
 
-       ret = smp_call_function_mask(mask, func, info, wait);
-       if (cpu_isset(smp_processor_id(), mask))
+       smp_call_function_many(mask, func, info, wait);
+       if (cpumask_test_cpu(smp_processor_id(), mask))
                func(info);
 
        preempt_enable();
-
-       return ret;
 }
 
 /**********************************************************************/
@@ -602,20 +592,17 @@ void flush_tlb_all(void)
 
 void flush_tlb_mm(struct mm_struct *mm)
 {
-       cpumask_t mask = mm->cpu_vm_mask;
-
-       on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, mask);
+       on_each_cpu_mask(ipi_flush_tlb_mm, mm, 1, &mm->cpu_vm_mask);
 }
 
 void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
 {
-       cpumask_t mask = vma->vm_mm->cpu_vm_mask;
        struct tlb_args ta;
 
        ta.ta_vma = vma;
        ta.ta_start = uaddr;
 
-       on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, mask);
+       on_each_cpu_mask(ipi_flush_tlb_page, &ta, 1, &vma->vm_mm->cpu_vm_mask);
 }
 
 void flush_tlb_kernel_page(unsigned long kaddr)
@@ -630,14 +617,13 @@ void flush_tlb_kernel_page(unsigned long kaddr)
 void flush_tlb_range(struct vm_area_struct *vma,
                      unsigned long start, unsigned long end)
 {
-       cpumask_t mask = vma->vm_mm->cpu_vm_mask;
        struct tlb_args ta;
 
        ta.ta_vma = vma;
        ta.ta_start = start;
        ta.ta_end = end;
 
-       on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, mask);
+       on_each_cpu_mask(ipi_flush_tlb_range, &ta, 1, &vma->vm_mm->cpu_vm_mask);
 }
 
 void flush_tlb_kernel_range(unsigned long start, unsigned long end)

diff --git a/arch/arm/mach-realview/include/mach/smp.h b/arch/arm/mach-realview/include/mach/smp.h
index 515819e..e2ff534 100644 (file)
--- a/arch/arm/mach-realview/include/mach/smp.h
+++ b/arch/arm/mach-realview/include/mach/smp.h
@@ -15,15 +15,15 @@
 /*
  * We use IRQ1 as the IPI
  */
-static inline void smp_cross_call(cpumask_t callmap)
+static inline void smp_cross_call(const struct cpumask *mask)
 {
-       gic_raise_softirq(callmap, 1);
+       gic_raise_softirq(mask, 1);
 }
 
 /*
  * Do nothing on MPcore.
  */
-static inline void smp_cross_call_done(cpumask_t callmap)
+static inline void smp_cross_call_done(const struct cpumask *mask)
 {
 }
 

diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index ea3c755..a573046 100644 (file)
--- a/arch/arm/mach-realview/platsmp.c
+++ b/arch/arm/mach-realview/platsmp.c
@@ -82,7 +82,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
         * to get this processor out of WFI in the BootMonitor - make
         * sure that we are no longer being sent this soft interrupt
         */
-       smp_cross_call_done(cpumask_of_cpu(cpu));
+       smp_cross_call_done(cpumask_of(cpu));
 
        /*
         * if any interrupts are already enabled for the primary
@@ -136,7 +136,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
         * Use smp_cross_call() for this, since there's little
         * point duplicating the code here
         */
-       smp_cross_call(cpumask_of_cpu(cpu));
+       smp_cross_call(cpumask_of(cpu));
 
        timeout = jiffies + (1 * HZ);
        while (time_before(jiffies, timeout)) {