x86: ftrace - simplify wait_for_nmi

Get rid of 'waited' stack variable. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
git-mirror · Jan 27, 2009 · 8902528 · 8902528
1 parent 4a66a82
commit 8902528
Showing 1 changed file with 5 additions and 6 deletions.
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
@@ -133,15 +133,14 @@ void ftrace_nmi_exit(void)
 
 static void wait_for_nmi(void)
 {
-	int waited = 0;
+	if (!atomic_read(&in_nmi))
+		return;
 
-	while (atomic_read(&in_nmi)) {
-		waited = 1;
+	do {
 		cpu_relax();
-	}
+	} while(atomic_read(&in_nmi));
 
-	if (waited)
-		nmi_wait_count++;
+	nmi_wait_count++;
 }
 
 static int