Merge branch 'hotfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...

[pandora-kernel.git] / arch / sh / kernel / time_64.c

diff --git a/arch/sh/kernel/time_64.c b/arch/sh/kernel/time_64.c
index f819ba3..791edab 100644 (file)
--- a/arch/sh/kernel/time_64.c
+++ b/arch/sh/kernel/time_64.c
@@ -33,8 +33,8 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
-#include <asm/cpu/registers.h>  /* required by inline __asm__ stmt. */
-#include <asm/cpu/irq.h>
+#include <cpu/registers.h>      /* required by inline __asm__ stmt. */
+#include <cpu/irq.h>
 #include <asm/addrspace.h>
 #include <asm/processor.h>
 #include <asm/uaccess.h>
@@ -172,6 +172,7 @@ void do_gettimeofday(struct timeval *tv)
        tv->tv_sec = sec;
        tv->tv_usec = usec;
 }
+EXPORT_SYMBOL(do_gettimeofday);
 
 int do_settimeofday(struct timespec *tv)
 {
@@ -229,15 +230,22 @@ static long last_rtc_update;
 static inline void do_timer_interrupt(void)
 {
        unsigned long long current_ctc;
+
+       if (current->pid)
+               profile_tick(CPU_PROFILING);
+
+       /*
+        * Here we are in the timer irq handler. We just have irqs locally
+        * disabled but we don't know if the timer_bh is running on the other
+        * CPU. We need to avoid to SMP race with it. NOTE: we don' t need
+        * the irq version of write_lock because as just said we have irq
+        * locally disabled. -arca
+        */
+       write_seqlock(&xtime_lock);
        asm ("getcon cr62, %0" : "=r" (current_ctc));
        ctc_last_interrupt = (unsigned long) current_ctc;
 
        do_timer(1);
-#ifndef CONFIG_SMP
-       update_process_times(user_mode(get_irq_regs()));
-#endif
-       if (current->pid)
-               profile_tick(CPU_PROFILING);
 
 #ifdef CONFIG_HEARTBEAT
        if (sh_mv.mv_heartbeat != NULL)
@@ -259,6 +267,11 @@ static inline void do_timer_interrupt(void)
                        /* do it again in 60 s */
                        last_rtc_update = xtime.tv_sec - 600;
        }
+       write_sequnlock(&xtime_lock);
+
+#ifndef CONFIG_SMP
+       update_process_times(user_mode(get_irq_regs()));
+#endif
 }
 
 /*
@@ -275,16 +288,7 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
        timer_status &= ~0x100;
        ctrl_outw(timer_status, TMU0_TCR);
 
-       /*
-        * Here we are in the timer irq handler. We just have irqs locally
-        * disabled but we don't know if the timer_bh is running on the other
-        * CPU. We need to avoid to SMP race with it. NOTE: we don' t need
-        * the irq version of write_lock because as just said we have irq
-        * locally disabled. -arca
-        */
-       write_lock(&xtime_lock);
        do_timer_interrupt();
-       write_unlock(&xtime_lock);
 
        return IRQ_HANDLED;
 }