Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 8 insertions, 108 deletions

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 567dd7c3ac2..2c42cd72d0f 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -17,8 +17,7 @@
  *
  * TODO (not necessarily in this file):
  * - improve precision and reproducibility of timebase frequency
- * measurement at boot time. (for iSeries, we calibrate the timebase
- * against the Titan chip's clock.)
+ * measurement at boot time.
  * - for astronomical applications: add a new function to get
  * non ambiguous timestamps even around leap seconds. This needs
  * a new timestamp format and a good name.
@@ -70,10 +69,6 @@
 #include <asm/vdso_datapage.h>
 #include <asm/firmware.h>
 #include <asm/cputime.h>
-#ifdef CONFIG_PPC_ISERIES
-#include <asm/iseries/it_lp_queue.h>
-#include <asm/iseries/hv_call_xm.h>
-#endif
 
 /* powerpc clocksource/clockevent code */
 
@@ -117,14 +112,6 @@ static struct clock_event_device decrementer_clockevent = {
 DEFINE_PER_CPU(u64, decrementers_next_tb);
 static DEFINE_PER_CPU(struct clock_event_device, decrementers);
 
-#ifdef CONFIG_PPC_ISERIES
-static unsigned long __initdata iSeries_recal_titan;
-static signed long __initdata iSeries_recal_tb;
-
-/* Forward declaration is only needed for iSereis compiles */
-static void __init clocksource_init(void);
-#endif
-
 #define XSEC_PER_SEC (1024*1024)
 
 #ifdef CONFIG_PPC64
@@ -259,7 +246,6 @@ void accumulate_stolen_time(void)
 	u64 sst, ust;
 
 	u8 save_soft_enabled = local_paca->soft_enabled;
-	u8 save_hard_enabled = local_paca->hard_enabled;
 
 	/* We are called early in the exception entry, before
 	 * soft/hard_enabled are sync'ed to the expected state
@@ -268,7 +254,6 @@ void accumulate_stolen_time(void)
 	 * complain
 	 */
 	local_paca->soft_enabled = 0;
-	local_paca->hard_enabled = 0;
 
 	sst = scan_dispatch_log(local_paca->starttime_user);
 	ust = scan_dispatch_log(local_paca->starttime);
@@ -277,7 +262,6 @@ void accumulate_stolen_time(void)
 	local_paca->stolen_time += ust + sst;
 
 	local_paca->soft_enabled = save_soft_enabled;
-	local_paca->hard_enabled = save_hard_enabled;
 }
 
 static inline u64 calculate_stolen_time(u64 stop_tb)
@@ -426,74 +410,6 @@ unsigned long profile_pc(struct pt_regs *regs)
 EXPORT_SYMBOL(profile_pc);
 #endif
 
-#ifdef CONFIG_PPC_ISERIES
-
-/* 
- * This function recalibrates the timebase based on the 49-bit time-of-day
- * value in the Titan chip.  The Titan is much more accurate than the value
- * returned by the service processor for the timebase frequency.
- */
-
-static int __init iSeries_tb_recal(void)
-{
-	unsigned long titan, tb;
-
-	/* Make sure we only run on iSeries */
-	if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		return -ENODEV;
-
-	tb = get_tb();
-	titan = HvCallXm_loadTod();
-	if ( iSeries_recal_titan ) {
-		unsigned long tb_ticks = tb - iSeries_recal_tb;
-		unsigned long titan_usec = (titan - iSeries_recal_titan) >> 12;
-		unsigned long new_tb_ticks_per_sec   = (tb_ticks * USEC_PER_SEC)/titan_usec;
-		unsigned long new_tb_ticks_per_jiffy =
-			DIV_ROUND_CLOSEST(new_tb_ticks_per_sec, HZ);
-		long tick_diff = new_tb_ticks_per_jiffy - tb_ticks_per_jiffy;
-		char sign = '+';		
-		/* make sure tb_ticks_per_sec and tb_ticks_per_jiffy are consistent */
-		new_tb_ticks_per_sec = new_tb_ticks_per_jiffy * HZ;
-
-		if ( tick_diff < 0 ) {
-			tick_diff = -tick_diff;
-			sign = '-';
-		}
-		if ( tick_diff ) {
-			if ( tick_diff < tb_ticks_per_jiffy/25 ) {
-				printk( "Titan recalibrate: new tb_ticks_per_jiffy = %lu (%c%ld)\n",
-						new_tb_ticks_per_jiffy, sign, tick_diff );
-				tb_ticks_per_jiffy = new_tb_ticks_per_jiffy;
-				tb_ticks_per_sec   = new_tb_ticks_per_sec;
-				calc_cputime_factors();
-				vdso_data->tb_ticks_per_sec = tb_ticks_per_sec;
-				setup_cputime_one_jiffy();
-			}
-			else {
-				printk( "Titan recalibrate: FAILED (difference > 4 percent)\n"
-					"                   new tb_ticks_per_jiffy = %lu\n"
-					"                   old tb_ticks_per_jiffy = %lu\n",
-					new_tb_ticks_per_jiffy, tb_ticks_per_jiffy );
-			}
-		}
-	}
-	iSeries_recal_titan = titan;
-	iSeries_recal_tb = tb;
-
-	/* Called here as now we know accurate values for the timebase */
-	clocksource_init();
-	return 0;
-}
-late_initcall(iSeries_tb_recal);
-
-/* Called from platform early init */
-void __init iSeries_time_init_early(void)
-{
-	iSeries_recal_tb = get_tb();
-	iSeries_recal_titan = HvCallXm_loadTod();
-}
-#endif /* CONFIG_PPC_ISERIES */
-
 #ifdef CONFIG_IRQ_WORK
 
 /*
@@ -550,16 +466,6 @@ void arch_irq_work_raise(void)
 #endif /* CONFIG_IRQ_WORK */
 
 /*
- * For iSeries shared processors, we have to let the hypervisor
- * set the hardware decrementer.  We set a virtual decrementer
- * in the lppaca and call the hypervisor if the virtual
- * decrementer is less than the current value in the hardware
- * decrementer. (almost always the new decrementer value will
- * be greater than the current hardware decementer so the hypervisor
- * call will not be needed)
- */
-
-/*
  * timer_interrupt - gets called when the decrementer overflows,
  * with interrupts disabled.
  */
@@ -580,6 +486,11 @@ void timer_interrupt(struct pt_regs * regs)
 	if (!cpu_online(smp_processor_id()))
 		return;
 
+	/* Conditionally hard-enable interrupts now that the DEC has been
+	 * bumped to its maximum value
+	 */
+	may_hard_irq_enable();
+
 	trace_timer_interrupt_entry(regs);
 
 	__get_cpu_var(irq_stat).timer_irqs++;
@@ -597,20 +508,10 @@ void timer_interrupt(struct pt_regs * regs)
 		irq_work_run();
 	}
 
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES))
-		get_lppaca()->int_dword.fields.decr_int = 0;
-#endif
-
 	*next_tb = ~(u64)0;
 	if (evt->event_handler)
 		evt->event_handler(evt);
 
-#ifdef CONFIG_PPC_ISERIES
-	if (firmware_has_feature(FW_FEATURE_ISERIES) && hvlpevent_is_pending())
-		process_hvlpevents();
-#endif
-
 #ifdef CONFIG_PPC64
 	/* collect purr register values often, for accurate calculations */
 	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
@@ -982,9 +883,8 @@ void __init time_init(void)
 	 */
 	start_cpu_decrementer();
 
-	/* Register the clocksource, if we're not running on iSeries */
-	if (!firmware_has_feature(FW_FEATURE_ISERIES))
-		clocksource_init();
+	/* Register the clocksource */
+	clocksource_init();
 
 	init_decrementer_clockevent();
 }