Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6

* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  x86 idle: deprecate mwait_idle() and "idle=mwait" cmdline param
  x86 idle: deprecate "no-hlt" cmdline param
  x86 idle APM: deprecate CONFIG_APM_CPU_IDLE
  x86 idle floppy: deprecate disable_hlt()
  x86 idle: EXPORT_SYMBOL(default_idle, pm_idle) only when APM demands it
  x86 idle: clarify AMD erratum 400 workaround
  idle governor: Avoid lock acquisition to read pm_qos before entering idle
  cpuidle: menu: fixed wrapping timers at 4.294 seconds

8 files changed, 32 insertions, 26 deletions

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 416d865eae39..610001d385dd 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -139,7 +139,7 @@ static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
             boot_cpu_data.x86_model <= 0x05 &&
             boot_cpu_data.x86_mask < 0x0A)
                 return 1;
-        else if (c1e_detected)
+        else if (amd_e400_c1e_detected)
                 return 1;
         else
                 return max_cstate;
diff --git a/arch/x86/include/asm/idle.h b/arch/x86/include/asm/idle.h
index 38d87379e270..f49253d75710 100644
--- a/arch/x86/include/asm/idle.h
+++ b/arch/x86/include/asm/idle.h
@@ -16,6 +16,6 @@ static inline void enter_idle(void) { }
 static inline void exit_idle(void) { }
 #endif /* CONFIG_X86_64 */
 
-void c1e_remove_cpu(int cpu);
+void amd_e400_remove_cpu(int cpu);
 
 #endif /* _ASM_X86_IDLE_H */
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 4c25ab48257b..219371546afd 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -754,10 +754,10 @@ static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
 extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx);
 
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
-extern void init_c1e_mask(void);
+extern void init_amd_e400_c1e_mask(void);
 
 extern unsigned long            boot_option_idle_override;
-extern bool                     c1e_detected;
+extern bool                     amd_e400_c1e_detected;
 
 enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_NOMWAIT,
                          IDLE_POLL, IDLE_FORCE_MWAIT};
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index 3bfa02235965..965a7666c283 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -361,6 +361,7 @@ struct apm_user {
  * idle percentage above which bios idle calls are done
  */
 #ifdef CONFIG_APM_CPU_IDLE
+#warning deprecated CONFIG_APM_CPU_IDLE will be deleted in 2012
 #define DEFAULT_IDLE_THRESHOLD  95
 #else
 #define DEFAULT_IDLE_THRESHOLD  100
@@ -904,6 +905,7 @@ static void apm_cpu_idle(void)
         unsigned int jiffies_since_last_check = jiffies - last_jiffies;
         unsigned int bucket;
 
+        WARN_ONCE(1, "deprecated apm_cpu_idle will be deleted in 2012");
 recalc:
         if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
                 use_apm_idle = 0;
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index c39576cb3018..525514cf33c3 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -19,6 +19,7 @@
 
 static int __init no_halt(char *s)
 {
+        WARN_ONCE(1, "\"no-hlt\" is deprecated, please use \"idle=poll\"\n");
         boot_cpu_data.hlt_works_ok = 0;
         return 1;
 }
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 53f02f5d8cce..22a073d7fbff 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -902,7 +902,7 @@ static void vgetcpu_set_mode(void)
 void __init identify_boot_cpu(void)
 {
         identify_cpu(&boot_cpu_data);
-        init_c1e_mask();
+        init_amd_e400_c1e_mask();
 #ifdef CONFIG_X86_32
         sysenter_setup();
         enable_sep_cpu();
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 88a90a977f8e..426a5b66f7e4 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -337,7 +337,9 @@ EXPORT_SYMBOL(boot_option_idle_override);
  * Powermanagement idle function, if any..
  */
 void (*pm_idle)(void);
+#if defined(CONFIG_APM_MODULE) && defined(CONFIG_APM_CPU_IDLE)
 EXPORT_SYMBOL(pm_idle);
+#endif
 
 #ifdef CONFIG_X86_32
 /*
@@ -397,7 +399,7 @@ void default_idle(void)
                 cpu_relax();
         }
 }
-#ifdef CONFIG_APM_MODULE
+#if defined(CONFIG_APM_MODULE) && defined(CONFIG_APM_CPU_IDLE)
 EXPORT_SYMBOL(default_idle);
 #endif
 
@@ -535,45 +537,45 @@ int mwait_usable(const struct cpuinfo_x86 *c)
         return (edx & MWAIT_EDX_C1);
 }
 
-bool c1e_detected;
-EXPORT_SYMBOL(c1e_detected);
+bool amd_e400_c1e_detected;
+EXPORT_SYMBOL(amd_e400_c1e_detected);
 
-static cpumask_var_t c1e_mask;
+static cpumask_var_t amd_e400_c1e_mask;
 
-void c1e_remove_cpu(int cpu)
+void amd_e400_remove_cpu(int cpu)
 {
-        if (c1e_mask != NULL)
-                cpumask_clear_cpu(cpu, c1e_mask);
+        if (amd_e400_c1e_mask != NULL)
+                cpumask_clear_cpu(cpu, amd_e400_c1e_mask);
 }
 
 /*
- * C1E aware idle routine. We check for C1E active in the interrupt
+ * AMD Erratum 400 aware idle routine. We check for C1E active in the interrupt
  * pending message MSR. If we detect C1E, then we handle it the same
  * way as C3 power states (local apic timer and TSC stop)
  */
-static void c1e_idle(void)
+static void amd_e400_idle(void)
 {
         if (need_resched())
                 return;
 
-        if (!c1e_detected) {
+        if (!amd_e400_c1e_detected) {
                 u32 lo, hi;
 
                 rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi);
 
                 if (lo & K8_INTP_C1E_ACTIVE_MASK) {
-                        c1e_detected = true;
+                        amd_e400_c1e_detected = true;
                         if (!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
                                 mark_tsc_unstable("TSC halt in AMD C1E");
                         printk(KERN_INFO "System has AMD C1E enabled\n");
                 }
         }
 
-        if (c1e_detected) {
+        if (amd_e400_c1e_detected) {
                 int cpu = smp_processor_id();
 
-                if (!cpumask_test_cpu(cpu, c1e_mask)) {
-                        cpumask_set_cpu(cpu, c1e_mask);
+                if (!cpumask_test_cpu(cpu, amd_e400_c1e_mask)) {
+                        cpumask_set_cpu(cpu, amd_e400_c1e_mask);
                         /*
                          * Force broadcast so ACPI can not interfere.
                          */
@@ -616,17 +618,17 @@ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
                 pm_idle = mwait_idle;
         } else if (cpu_has_amd_erratum(amd_erratum_400)) {
                 /* E400: APIC timer interrupt does not wake up CPU from C1e */
-                printk(KERN_INFO "using C1E aware idle routine\n");
-                pm_idle = c1e_idle;
+                printk(KERN_INFO "using AMD E400 aware idle routine\n");
+                pm_idle = amd_e400_idle;
         } else
                 pm_idle = default_idle;
 }
 
-void __init init_c1e_mask(void)
+void __init init_amd_e400_c1e_mask(void)
 {
-        /* If we're using c1e_idle, we need to allocate c1e_mask. */
-        if (pm_idle == c1e_idle)
-                zalloc_cpumask_var(&c1e_mask, GFP_KERNEL);
+        /* If we're using amd_e400_idle, we need to allocate amd_e400_c1e_mask. */
+        if (pm_idle == amd_e400_idle)
+                zalloc_cpumask_var(&amd_e400_c1e_mask, GFP_KERNEL);
 }
 
 static int __init idle_setup(char *str)
@@ -640,6 +642,7 @@ static int __init idle_setup(char *str)
                 boot_option_idle_override = IDLE_POLL;
         } else if (!strcmp(str, "mwait")) {
                 boot_option_idle_override = IDLE_FORCE_MWAIT;
+                WARN_ONCE(1, "\idle=mwait\" will be removed in 2012\"\n");
         } else if (!strcmp(str, "halt")) {
                 /*
                  * When the boot option of idle=halt is added, halt is
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a3c430bdfb60..eefd96765e79 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1307,7 +1307,7 @@ void play_dead_common(void)
 {
         idle_task_exit();
         reset_lazy_tlbstate();
-        c1e_remove_cpu(raw_smp_processor_id());
+        amd_e400_remove_cpu(raw_smp_processor_id());
 
         mb();
         /* Ack it */