Merge branches 'irq/sparseirq', 'x86/quirks' and 'x86/reboot' into cpus4096

[linux-2.6-block.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index c622772744d86fcb0dcd3e6c46a6de5323508c40..95d811a9594fda74e35b926fa8ff4777a750e37c 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -7,7 +7,9 @@
 #include <linux/module.h>
 #include <linux/pm.h>
 #include <linux/clockchips.h>
+#include <linux/ftrace.h>
 #include <asm/system.h>
+#include <asm/apic.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -100,6 +102,9 @@ static inline int hlt_use_halt(void)
 void default_idle(void)
 {
        if (hlt_use_halt()) {
+               struct power_trace it;
+
+               trace_power_start(&it, POWER_CSTATE, 1);
                current_thread_info()->status &= ~TS_POLLING;
                /*
                 * TS_POLLING-cleared state must be visible before we
@@ -112,6 +117,7 @@ void default_idle(void)
                else
                        local_irq_enable();
                current_thread_info()->status |= TS_POLLING;
+               trace_power_end(&it);
        } else {
                local_irq_enable();
                /* loop is done by the caller */
@@ -122,6 +128,21 @@ void default_idle(void)
 EXPORT_SYMBOL(default_idle);
 #endif
 
+void stop_this_cpu(void *dummy)
+{
+       local_irq_disable();
+       /*
+        * Remove this CPU:
+        */
+       cpu_clear(smp_processor_id(), cpu_online_map);
+       disable_local_APIC();
+
+       for (;;) {
+               if (hlt_works(smp_processor_id()))
+                       halt();
+       }
+}
+
 static void do_nothing(void *unused)
 {
 }
@@ -154,24 +175,31 @@ EXPORT_SYMBOL_GPL(cpu_idle_wait);
  */
 void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
+       struct power_trace it;
+
+       trace_power_start(&it, POWER_CSTATE, (ax>>4)+1);
        if (!need_resched()) {
                __monitor((void *)&current_thread_info()->flags, 0, 0);
                smp_mb();
                if (!need_resched())
                        __mwait(ax, cx);
        }
+       trace_power_end(&it);
 }
 
 /* Default MONITOR/MWAIT with no hints, used for default C1 state */
 static void mwait_idle(void)
 {
+       struct power_trace it;
        if (!need_resched()) {
+               trace_power_start(&it, POWER_CSTATE, 1);
                __monitor((void *)&current_thread_info()->flags, 0, 0);
                smp_mb();
                if (!need_resched())
                        __sti_mwait(0, 0);
                else
                        local_irq_enable();
+               trace_power_end(&it);
        } else
                local_irq_enable();
 }
@@ -183,9 +211,13 @@ static void mwait_idle(void)
  */
 static void poll_idle(void)
 {
+       struct power_trace it;
+
+       trace_power_start(&it, POWER_CSTATE, 0);
        local_irq_enable();
        while (!need_resched())
                cpu_relax();
+       trace_power_end(&it);
 }
 
 /*