[ARM] Fix SMP irqflags support

The IRQ changes a while back broke the build for SMP machines.
Fix up the SMP code to use set_irq_regs/get_irq_regs as
appropriate.  Also, fix a warning in arch/arm/kernel/time.c
where 'regs' becomes unused for SMP builds.

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

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 421329f..a07d202 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -7,6 +7,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
@@ -19,6 +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>
@@ -474,25 +476,26 @@ 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
 
@@ -551,6 +554,7 @@ 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++;
 
@@ -574,7 +578,7 @@ asmlinkage void do_IPI(struct pt_regs *regs)
 
                        switch (nextmsg) {
                        case IPI_TIMER:
-                               ipi_timer(regs);
+                               ipi_timer();
                                break;
 
                        case IPI_RESCHEDULE:
@@ -599,6 +603,8 @@ asmlinkage void do_IPI(struct pt_regs *regs)
                        }
                } while (msgs);
        }
+
+       set_irq_regs(old_regs);
 }
 
 void smp_send_reschedule(int cpu)

diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index c03cab5..0c5a609 100644 (file)
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -327,13 +327,12 @@ EXPORT_SYMBOL(restore_time_delta);
  */
 void timer_tick(void)
 {
-       struct pt_regs *regs = get_irq_regs();
        profile_tick(CPU_PROFILING);
        do_leds();
        do_set_rtc();
        do_timer(1);
 #ifndef CONFIG_SMP
-       update_process_times(user_mode(regs));
+       update_process_times(user_mode(get_irq_regs()));
 #endif
 }