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authorIngo Molnar <mingo@elte.hu>2007-07-21 04:37:36 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-21 17:49:15 -0700
commit820de5c39ef7f6866d2c9e6c7d208bcd2a6e1942 (patch)
treebe28af991bb9fa26ece3ffb44b01c7038aa70fa4 /kernel/time/tick-oneshot.c
parent3704540b48295253bd9c87a5e7ff545f9d47a3b8 (diff)
downloadop-kernel-dev-820de5c39ef7f6866d2c9e6c7d208bcd2a6e1942.zip
op-kernel-dev-820de5c39ef7f6866d2c9e6c7d208bcd2a6e1942.tar.gz
highres: improve debug output
Add some more debug information to the hrtimer and clock events code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/time/tick-oneshot.c')
-rw-r--r--kernel/time/tick-oneshot.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c
index f6997ab..0258d31 100644
--- a/kernel/time/tick-oneshot.c
+++ b/kernel/time/tick-oneshot.c
@@ -73,8 +73,21 @@ int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *))
struct clock_event_device *dev = td->evtdev;
if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
- !tick_device_is_functional(dev))
+ !tick_device_is_functional(dev)) {
+
+ printk(KERN_INFO "Clockevents: "
+ "could not switch to one-shot mode:");
+ if (!dev) {
+ printk(" no tick device\n");
+ } else {
+ if (!tick_device_is_functional(dev))
+ printk(" %s is not functional.\n", dev->name);
+ else
+ printk(" %s does not support one-shot mode.\n",
+ dev->name);
+ }
return -EINVAL;
+ }
td->mode = TICKDEV_MODE_ONESHOT;
dev->event_handler = handler;
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