---

yaml --- r: 140561 b: refs/heads/master c: 30e1e6d h: refs/heads/master i: 140559: bbddc4d v: v3
git-mirror · Mar 18, 2009 · d958699 · d958699
1 parent 860b7b1
commit d958699
Show file tree

Hide file tree

Showing 4 changed files with 14 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 082edb7bf443eb8eda15b482d16ad9dd8137ad24
+refs/heads/master: 30e1e6d1af2b67558bccf322af2b3e0676b209ae
diff --git a/trunk/arch/x86/include/asm/processor.h b/trunk/arch/x86/include/asm/processor.h
@@ -733,6 +733,7 @@ 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 unsigned long		boot_option_idle_override;
 extern unsigned long		idle_halt;

diff --git a/trunk/arch/x86/kernel/cpu/common.c b/trunk/arch/x86/kernel/cpu/common.c
@@ -812,6 +812,7 @@ static void vgetcpu_set_mode(void)
 void __init identify_boot_cpu(void)
 {
 	identify_cpu(&boot_cpu_data);
+	init_c1e_mask();
 #ifdef CONFIG_X86_32
 	sysenter_setup();
 	enable_sep_cpu();

diff --git a/trunk/arch/x86/kernel/process.c b/trunk/arch/x86/kernel/process.c
@@ -479,7 +479,8 @@ static int c1e_detected;
 
 void c1e_remove_cpu(int cpu)
 {
-	cpumask_clear_cpu(cpu, c1e_mask);
+	if (c1e_mask != NULL)
+		cpumask_clear_cpu(cpu, c1e_mask);
 }
 
 /*
@@ -556,13 +557,20 @@ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
 		pm_idle = mwait_idle;
 	} else if (check_c1e_idle(c)) {
 		printk(KERN_INFO "using C1E aware idle routine\n");
-		alloc_cpumask_var(&c1e_mask, GFP_KERNEL);
-		cpumask_clear(c1e_mask);
 		pm_idle = c1e_idle;
 	} else
 		pm_idle = default_idle;
 }
 
+void __init init_c1e_mask(void)
+{
+	/* If we're using c1e_idle, we need to allocate c1e_mask. */
+	if (pm_idle == c1e_idle) {
+		alloc_cpumask_var(&c1e_mask, GFP_KERNEL);
+		cpumask_clear(c1e_mask);
+	}
+}
+
 static int __init idle_setup(char *str)
 {
 	if (!str)