Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 57d1868a86aadc060bc2260b34139809a98ffab5..ff4554198981217172f8db1a43cac5228f1ff41d 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -14,6 +14,7 @@
 #include <linux/utsname.h>
 #include <trace/events/power.h>
 #include <linux/hw_breakpoint.h>
+#include <asm/cpu.h>
 #include <asm/system.h>
 #include <asm/apic.h>
 #include <asm/syscalls.h>
@@ -22,11 +23,6 @@
 #include <asm/i387.h>
 #include <asm/debugreg.h>
 
-unsigned long idle_halt;
-EXPORT_SYMBOL(idle_halt);
-unsigned long idle_nomwait;
-EXPORT_SYMBOL(idle_nomwait);
-
 struct kmem_cache *task_xstate_cachep;
 EXPORT_SYMBOL_GPL(task_xstate_cachep);
 
@@ -91,27 +87,36 @@ void exit_thread(void)
 void show_regs(struct pt_regs *regs)
 {
        show_registers(regs);
-       show_trace(NULL, regs, (unsigned long *)kernel_stack_pointer(regs),
-                  regs->bp);
+       show_trace(NULL, regs, (unsigned long *)kernel_stack_pointer(regs));
 }
 
 void show_regs_common(void)
 {
-       const char *board, *product;
+       const char *vendor, *product, *board;
 
-       board = dmi_get_system_info(DMI_BOARD_NAME);
-       if (!board)
-               board = "";
+       vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+       if (!vendor)
+               vendor = "";
        product = dmi_get_system_info(DMI_PRODUCT_NAME);
        if (!product)
                product = "";
 
+       /* Board Name is optional */
+       board = dmi_get_system_info(DMI_BOARD_NAME);
+
        printk(KERN_CONT "\n");
-       printk(KERN_DEFAULT "Pid: %d, comm: %.20s %s %s %.*s %s/%s\n",
+       printk(KERN_DEFAULT "Pid: %d, comm: %.20s %s %s %.*s",
                current->pid, current->comm, print_tainted(),
                init_utsname()->release,
                (int)strcspn(init_utsname()->version, " "),
-               init_utsname()->version, board, product);
+               init_utsname()->version);
+       printk(KERN_CONT " ");
+       printk(KERN_CONT "%s %s", vendor, product);
+       if (board) {
+               printk(KERN_CONT "/");
+               printk(KERN_CONT "%s", board);
+       }
+       printk(KERN_CONT "\n");
 }
 
 void flush_thread(void)
@@ -328,7 +333,7 @@ long sys_execve(const char __user *name,
 /*
  * Idle related variables and functions
  */
-unsigned long boot_option_idle_override = 0;
+unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE;
 EXPORT_SYMBOL(boot_option_idle_override);
 
 /*
@@ -374,6 +379,7 @@ void default_idle(void)
 {
        if (hlt_use_halt()) {
                trace_power_start(POWER_CSTATE, 1, smp_processor_id());
+               trace_cpu_idle(1, smp_processor_id());
                current_thread_info()->status &= ~TS_POLLING;
                /*
                 * TS_POLLING-cleared state must be visible before we
@@ -386,6 +392,8 @@ void default_idle(void)
                else
                        local_irq_enable();
                current_thread_info()->status |= TS_POLLING;
+               trace_power_end(smp_processor_id());
+               trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
        } else {
                local_irq_enable();
                /* loop is done by the caller */
@@ -443,9 +451,8 @@ EXPORT_SYMBOL_GPL(cpu_idle_wait);
  */
 void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
-       trace_power_start(POWER_CSTATE, (ax>>4)+1, smp_processor_id());
        if (!need_resched()) {
-               if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
+               if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
                        clflush((void *)&current_thread_info()->flags);
 
                __monitor((void *)&current_thread_info()->flags, 0, 0);
@@ -460,7 +467,8 @@ static void mwait_idle(void)
 {
        if (!need_resched()) {
                trace_power_start(POWER_CSTATE, 1, smp_processor_id());
-               if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
+               trace_cpu_idle(1, smp_processor_id());
+               if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
                        clflush((void *)&current_thread_info()->flags);
 
                __monitor((void *)&current_thread_info()->flags, 0, 0);
@@ -469,6 +477,8 @@ static void mwait_idle(void)
                        __sti_mwait(0, 0);
                else
                        local_irq_enable();
+               trace_power_end(smp_processor_id());
+               trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
        } else
                local_irq_enable();
 }
@@ -481,10 +491,12 @@ static void mwait_idle(void)
 static void poll_idle(void)
 {
        trace_power_start(POWER_CSTATE, 0, smp_processor_id());
+       trace_cpu_idle(0, smp_processor_id());
        local_irq_enable();
        while (!need_resched())
                cpu_relax();
-       trace_power_end(0);
+       trace_power_end(smp_processor_id());
+       trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
 }
 
 /*
@@ -499,17 +511,16 @@ static void poll_idle(void)
  *
  * idle=mwait overrides this decision and forces the usage of mwait.
  */
-static int __cpuinitdata force_mwait;
 
 #define MWAIT_INFO                     0x05
 #define MWAIT_ECX_EXTENDED_INFO                0x01
 #define MWAIT_EDX_C1                   0xf0
 
-static int __cpuinit mwait_usable(const struct cpuinfo_x86 *c)
+int mwait_usable(const struct cpuinfo_x86 *c)
 {
        u32 eax, ebx, ecx, edx;
 
-       if (force_mwait)
+       if (boot_option_idle_override == IDLE_FORCE_MWAIT)
                return 1;
 
        if (c->cpuid_level < MWAIT_INFO)
@@ -629,9 +640,10 @@ static int __init idle_setup(char *str)
        if (!strcmp(str, "poll")) {
                printk("using polling idle threads.\n");
                pm_idle = poll_idle;
-       } else if (!strcmp(str, "mwait"))
-               force_mwait = 1;
-       else if (!strcmp(str, "halt")) {
+               boot_option_idle_override = IDLE_POLL;
+       } else if (!strcmp(str, "mwait")) {
+               boot_option_idle_override = IDLE_FORCE_MWAIT;
+       } else if (!strcmp(str, "halt")) {
                /*
                 * When the boot option of idle=halt is added, halt is
                 * forced to be used for CPU idle. In such case CPU C2/C3
@@ -640,8 +652,7 @@ static int __init idle_setup(char *str)
                 * the boot_option_idle_override.
                 */
                pm_idle = default_idle;
-               idle_halt = 1;
-               return 0;
+               boot_option_idle_override = IDLE_HALT;
        } else if (!strcmp(str, "nomwait")) {
                /*
                 * If the boot option of "idle=nomwait" is added,
@@ -649,12 +660,10 @@ static int __init idle_setup(char *str)
                 * states. In such case it won't touch the variable
                 * of boot_option_idle_override.
                 */
-               idle_nomwait = 1;
-               return 0;
+               boot_option_idle_override = IDLE_NOMWAIT;
        } else
                return -1;
 
-       boot_option_idle_override = 1;
        return 0;
 }
 early_param("idle", idle_setup);