Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / ppc / kernel / time.c

diff --git a/arch/ppc/kernel/time.c b/arch/ppc/kernel/time.c
index cfeff04..53ea723 100644 (file)
--- a/arch/ppc/kernel/time.c
+++ b/arch/ppc/kernel/time.c
@@ -58,7 +58,6 @@
 #include <linux/init.h>
 #include <linux/profile.h>
 
-#include <asm/segment.h>
 #include <asm/io.h>
 #include <asm/nvram.h>
 #include <asm/cache.h>
@@ -67,11 +66,6 @@
 
 #include <asm/time.h>
 
-/* XXX false sharing with below? */
-u64 jiffies_64 = INITIAL_JIFFIES;
-
-EXPORT_SYMBOL(jiffies_64);
-
 unsigned long disarm_decr[NR_CPUS];
 
 extern struct timezone sys_tz;
@@ -89,9 +83,10 @@ unsigned long tb_to_ns_scale;
 
 extern unsigned long wall_jiffies;
 
-static long time_offset;
+/* used for timezone offset */
+static long timezone_offset;
 
-spinlock_t rtc_lock = SPIN_LOCK_UNLOCKED;
+DEFINE_SPINLOCK(rtc_lock);
 
 EXPORT_SYMBOL(rtc_lock);
 
@@ -108,40 +103,26 @@ static inline int tb_delta(unsigned *jiffy_stamp) {
        return delta;
 }
 
-extern char _stext;
-
-static inline void ppc_do_profile (struct pt_regs *regs)
+#ifdef CONFIG_SMP
+unsigned long profile_pc(struct pt_regs *regs)
 {
-       unsigned long nip;
-       extern unsigned long prof_cpu_mask;
+       unsigned long pc = instruction_pointer(regs);
 
-       profile_hook(regs);
+       if (in_lock_functions(pc))
+               return regs->link;
 
-       if (user_mode(regs))
-               return;
-
-       if (!prof_buffer)
-               return;
-
-       nip = instruction_pointer(regs);
-
-       /*
-        * Only measure the CPUs specified by /proc/irq/prof_cpu_mask.
-        * (default is all CPUs.)
-        */
-       if (!((1<<smp_processor_id()) & prof_cpu_mask))
-               return;
+       return pc;
+}
+EXPORT_SYMBOL(profile_pc);
+#endif
 
-       nip -= (unsigned long) &_stext;
-       nip >>= prof_shift;
-       /*
-        * Don't ignore out-of-bounds EIP values silently,
-        * put them into the last histogram slot, so if
-        * present, they will show up as a sharp peak.
+void wakeup_decrementer(void)
+{
+       set_dec(tb_ticks_per_jiffy);
+       /* No currently-supported powerbook has a 601,
+        * so use get_tbl, not native
         */
-       if (nip > prof_len-1)
-               nip = prof_len-1;
-       atomic_inc((atomic_t *)&prof_buffer[nip]);
+       last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
 }
 
 /*
@@ -161,10 +142,11 @@ void timer_interrupt(struct pt_regs * regs)
 
        irq_enter();
 
-       while ((next_dec = tb_ticks_per_jiffy - tb_delta(&jiffy_stamp)) < 0) {
+       while ((next_dec = tb_ticks_per_jiffy - tb_delta(&jiffy_stamp)) <= 0) {
                jiffy_stamp += tb_ticks_per_jiffy;
                
-               ppc_do_profile(regs);
+               profile_tick(CPU_PROFILING, regs);
+               update_process_times(user_mode(regs));
 
                if (smp_processor_id())
                        continue;
@@ -190,11 +172,11 @@ void timer_interrupt(struct pt_regs * regs)
                 * We should have an rtc call that only sets the minutes and
                 * seconds like on Intel to avoid problems with non UTC clocks.
                 */
-               if ( ppc_md.set_rtc_time && (time_status & STA_UNSYNC) == 0 &&
+               if ( ppc_md.set_rtc_time && ntp_synced() &&
                     xtime.tv_sec - last_rtc_update >= 659 &&
                     abs((xtime.tv_nsec / 1000) - (1000000-1000000/HZ)) < 500000/HZ &&
                     jiffies - wall_jiffies == 1) {
-                       if (ppc_md.set_rtc_time(xtime.tv_sec+1 + time_offset) == 0)
+                       if (ppc_md.set_rtc_time(xtime.tv_sec+1 + timezone_offset) == 0)
                                last_rtc_update = xtime.tv_sec+1;
                        else
                                /* Try again one minute later */
@@ -206,10 +188,6 @@ void timer_interrupt(struct pt_regs * regs)
                set_dec(next_dec);
        last_jiffy_stamp(cpu) = jiffy_stamp;
 
-#ifdef CONFIG_SMP
-       smp_local_timer_interrupt(regs);
-#endif /* CONFIG_SMP */
-
        if (ppc_md.heartbeat && !ppc_md.heartbeat_count--)
                ppc_md.heartbeat();
 
@@ -296,11 +274,7 @@ int do_settimeofday(struct timespec *tv)
         */
        last_rtc_update = new_sec - 658;
 
-       time_adjust = 0;                /* stop active adjtime() */
-       time_status |= STA_UNSYNC;
-       time_state = TIME_ERROR;        /* p. 24, (a) */
-       time_maxerror = NTP_PHASE_LIMIT;
-       time_esterror = NTP_PHASE_LIMIT;
+       ntp_clear();
        write_sequnlock_irqrestore(&xtime_lock, flags);
        clock_was_set();
        return 0;
@@ -315,7 +289,7 @@ void __init time_init(void)
        unsigned old_stamp, stamp, elapsed;
 
         if (ppc_md.time_init != NULL)
-                time_offset = ppc_md.time_init();
+                timezone_offset = ppc_md.time_init();
 
        if (__USE_RTC()) {
                /* 601 processor: dec counts down by 128 every 128ns */
@@ -360,10 +334,10 @@ void __init time_init(void)
        set_dec(tb_ticks_per_jiffy);
 
        /* If platform provided a timezone (pmac), we correct the time */
-        if (time_offset) {
-               sys_tz.tz_minuteswest = -time_offset / 60;
+        if (timezone_offset) {
+               sys_tz.tz_minuteswest = -timezone_offset / 60;
                sys_tz.tz_dsttime = 0;
-               xtime.tv_sec -= time_offset;
+               xtime.tv_sec -= timezone_offset;
         }
         set_normalized_timespec(&wall_to_monotonic,
                                 -xtime.tv_sec, -xtime.tv_nsec);