---

yaml --- r: 110274 b: refs/heads/master c: 970e725 h: refs/heads/master v: v3
git-mirror · May 12, 2008 · aa96534 · aa96534
1 parent 59aa412
commit aa96534
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Showing 2 changed files with 26 additions and 13 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 93fa7636dfdc059b25df148f230c0991096afdef
+refs/heads/master: 970e725098a6da5a9c1f8128102c812e31a0444c
diff --git a/trunk/arch/x86/kernel/process_32.c b/trunk/arch/x86/kernel/process_32.c
@@ -484,20 +484,13 @@ int set_tsc_mode(unsigned int val)
 	return 0;
 }
 
-static noinline void
-__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
-		 struct tss_struct *tss)
+#ifdef CONFIG_X86_DS
+static int update_debugctl(struct thread_struct *prev,
+			struct thread_struct *next, unsigned long debugctl)
 {
-	struct thread_struct *prev, *next;
-	unsigned long debugctl;
-	unsigned long ds_prev = 0, ds_next = 0;
+	unsigned long ds_prev = 0;
+	unsigned long ds_next = 0;
 
-	prev = &prev_p->thread;
-	next = &next_p->thread;
-
-	debugctl = prev->debugctlmsr;
-
-#ifdef CONFIG_X86_DS
 	if (prev->ds_ctx)
 		ds_prev = (unsigned long)prev->ds_ctx->ds;
 	if (next->ds_ctx)
@@ -510,8 +503,28 @@ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
 		update_debugctlmsr(0);
 		wrmsr(MSR_IA32_DS_AREA, ds_next, 0);
 	}
+	return debugctl;
+}
+#else
+static int update_debugctl(struct thread_struct *prev,
+			struct thread_struct *next, unsigned long debugctl)
+{
+	return debugctl;
+}
 #endif /* CONFIG_X86_DS */
 
+static noinline void
+__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
+		 struct tss_struct *tss)
+{
+	struct thread_struct *prev, *next;
+	unsigned long debugctl;
+
+	prev = &prev_p->thread;
+	next = &next_p->thread;
+
+	debugctl = update_debugctl(prev, next, prev->debugctlmsr);
+
 	if (next->debugctlmsr != debugctl)
 		update_debugctlmsr(next->debugctlmsr);