summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/ftrace.c
diff options
context:
space:
mode:
authorCyrill Gorcunov <gorcunov@gmail.com>2009-01-26 18:28:02 +0300
committerIngo Molnar <mingo@elte.hu>2009-01-27 14:31:17 +0100
commit890252823766e562301e61340f3187a14033d045 (patch)
tree01cb4853ed1c76c61eed4cc631bf38b3768060aa /arch/x86/kernel/ftrace.c
parent4a66a82be78e1b6f9f83074423bf42a52251414c (diff)
downloadop-kernel-dev-890252823766e562301e61340f3187a14033d045.zip
op-kernel-dev-890252823766e562301e61340f3187a14033d045.tar.gz
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>
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
-rw-r--r--arch/x86/kernel/ftrace.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 1b43086..4d33224 100644
--- 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
OpenPOWER on IntegriCloud