Pull video into test branch

[linux-drm-fsl-dcu.git] / arch / arm / kernel / smp.c

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index e55ea952f7aa1d9f84ecce020d5caaa548f244fd..070bcb7a63068188dfd7b39ad4be75dd3dede3d7 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -7,7 +7,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/config.h>
+#include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
@@ -20,6 +20,7 @@
 #include <linux/cpu.h>
 #include <linux/smp.h>
 #include <linux/seq_file.h>
+#include <linux/irq.h>
 
 #include <asm/atomic.h>
 #include <asm/cacheflush.h>
@@ -37,7 +38,9 @@
  * The online bitmask indicates that the CPU is up and running.
  */
 cpumask_t cpu_possible_map;
+EXPORT_SYMBOL(cpu_possible_map);
 cpumask_t cpu_online_map;
+EXPORT_SYMBOL(cpu_online_map);
 
 /*
  * as from 2.5, kernels no longer have an init_tasks structure
@@ -114,7 +117,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
         * We need to tell the secondary core where to find
         * its stack and the page tables.
         */
-       secondary_data.stack = (void *)idle->thread_info + THREAD_START_SP;
+       secondary_data.stack = task_stack_page(idle) + THREAD_START_SP;
        secondary_data.pgdir = virt_to_phys(pgd);
        wmb();
 
@@ -245,7 +248,7 @@ void __cpuexit cpu_die(void)
        __asm__("mov    sp, %0\n"
        "       b       secondary_start_kernel"
                :
-               : "r" ((void *)current->thread_info + THREAD_SIZE - 8));
+               : "r" (task_stack_page(current) + THREAD_SIZE - 8));
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
@@ -256,9 +259,7 @@ void __cpuexit cpu_die(void)
 asmlinkage void __cpuinit secondary_start_kernel(void)
 {
        struct mm_struct *mm = &init_mm;
-       unsigned int cpu;
-
-       cpu = smp_processor_id();
+       unsigned int cpu = smp_processor_id();
 
        printk("CPU%u: Booted secondary processor\n", cpu);
 
@@ -339,10 +340,6 @@ void __init smp_prepare_boot_cpu(void)
        unsigned int cpu = smp_processor_id();
 
        per_cpu(cpu_data, cpu).idle = current;
-
-       cpu_set(cpu, cpu_possible_map);
-       cpu_set(cpu, cpu_present_map);
-       cpu_set(cpu, cpu_online_map);
 }
 
 static void send_ipi_message(cpumask_t callmap, enum ipi_msg_type msg)
@@ -454,6 +451,7 @@ int smp_call_function(void (*func)(void *info), void *info, int retry,
        return smp_call_function_on_cpu(func, info, retry, wait,
                                        cpu_online_map);
 }
+EXPORT_SYMBOL_GPL(smp_call_function);
 
 void show_ipi_list(struct seq_file *p)
 {
@@ -479,25 +477,26 @@ void show_local_irqs(struct seq_file *p)
        seq_putc(p, '\n');
 }
 
-static void ipi_timer(struct pt_regs *regs)
+static void ipi_timer(void)
 {
-       int user = user_mode(regs);
-
        irq_enter();
-       profile_tick(CPU_PROFILING, regs);
-       update_process_times(user);
+       profile_tick(CPU_PROFILING);
+       update_process_times(user_mode(get_irq_regs()));
        irq_exit();
 }
 
 #ifdef CONFIG_LOCAL_TIMERS
 asmlinkage void do_local_timer(struct pt_regs *regs)
 {
+       struct pt_regs *old_regs = set_irq_regs(regs);
        int cpu = smp_processor_id();
 
        if (local_timer_ack()) {
                irq_stat[cpu].local_timer_irqs++;
-               ipi_timer(regs);
+               ipi_timer();
        }
+
+       set_irq_regs(old_regs);
 }
 #endif
 
@@ -556,6 +555,7 @@ asmlinkage void do_IPI(struct pt_regs *regs)
 {
        unsigned int cpu = smp_processor_id();
        struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
+       struct pt_regs *old_regs = set_irq_regs(regs);
 
        ipi->ipi_count++;
 
@@ -579,7 +579,7 @@ asmlinkage void do_IPI(struct pt_regs *regs)
 
                        switch (nextmsg) {
                        case IPI_TIMER:
-                               ipi_timer(regs);
+                               ipi_timer();
                                break;
 
                        case IPI_RESCHEDULE:
@@ -604,6 +604,8 @@ asmlinkage void do_IPI(struct pt_regs *regs)
                        }
                } while (msgs);
        }
+
+       set_irq_regs(old_regs);
 }
 
 void smp_send_reschedule(int cpu)