Add some basic resume trace facilities

Considering that there isn't a lot of hw we can depend on during resume,
this is about as good as it gets.

This is x86-only for now, although the basic concept (and most of the
code) will certainly work on almost any platform.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/include/asm-generic/rtc.h b/include/asm-generic/rtc.h
index cef08db34ada..4087037a4225 100644
--- a/include/asm-generic/rtc.h
+++ b/include/asm-generic/rtc.h
@@ -114,6 +114,7 @@ static inline unsigned int get_rtc_time(struct rtc_time *time)
 /* Set the current date and time in the real time clock. */
 static inline int set_rtc_time(struct rtc_time *time)
 {
+        unsigned long flags;
         unsigned char mon, day, hrs, min, sec;
         unsigned char save_control, save_freq_select;
         unsigned int yrs;
@@ -131,7 +132,7 @@ static inline int set_rtc_time(struct rtc_time *time)
         if (yrs > 255)  /* They are unsigned */
                 return -EINVAL;
 
-        spin_lock_irq(&rtc_lock);
+        spin_lock_irqsave(&rtc_lock, flags);
 #ifdef CONFIG_MACH_DECSTATION
         real_yrs = yrs;
         leap_yr = ((!((yrs + 1900) % 4) && ((yrs + 1900) % 100)) ||
@@ -152,7 +153,7 @@ static inline int set_rtc_time(struct rtc_time *time)
          * whether the chip is in binary mode or not.
          */
         if (yrs > 169) {
-                spin_unlock_irq(&rtc_lock);
+                spin_unlock_irqrestore(&rtc_lock, flags);
                 return -EINVAL;
         }
 
@@ -187,7 +188,7 @@ static inline int set_rtc_time(struct rtc_time *time)
         CMOS_WRITE(save_control, RTC_CONTROL);
         CMOS_WRITE(save_freq_select, RTC_FREQ_SELECT);
 
-        spin_unlock_irq(&rtc_lock);
+        spin_unlock_irqrestore(&rtc_lock, flags);
 
         return 0;
 }