linux-kernel - [PATCHv5 10/17] pps: use BUG_ON for kernel API safety checks

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Message-Id: <ca6970f9e0dfd5080e5f3307b55a097c2285f25e.1290599845.git.lasaine@lvk.cs.msu.su>
Date:	Wed, 24 Nov 2010 19:15:48 +0300
From:	Alexander Gordeev <lasaine@....cs.msu.su>
To:	linux-kernel@...r.kernel.org
Cc:	"Nikita V\. Youshchenko" <yoush@...msu.su>,
	linuxpps@...enneenne.com, Rodolfo Giometti <giometti@...eenne.com>,
	Alexander Gordeev <lasaine@....cs.msu.su>,
	Tejun Heo <tj@...nel.org>
Subject: [PATCHv5 10/17] pps: use BUG_ON for kernel API safety checks

This way less overhead is involved when running production kernel.
If you want to debug a pps client module please define DEBUG to enable
the checks.

Acked-by: Rodolfo Giometti <giometti@...ux.it>
Signed-off-by: Alexander Gordeev <lasaine@....cs.msu.su>
---
 drivers/pps/kapi.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c
index c42d3cb..3e8eb3f 100644
--- a/drivers/pps/kapi.c
+++ b/drivers/pps/kapi.c
@@ -166,10 +166,8 @@ void pps_event(struct pps_device *pps, struct pps_event_time *ts, int event,
 	int captured = 0;
 	struct pps_ktime ts_real;
 
-	if ((event & (PPS_CAPTUREASSERT | PPS_CAPTURECLEAR)) == 0) {
-		dev_err(pps->dev, "unknown event (%x)\n", event);
-		return;
-	}
+	/* check event type */
+	BUG_ON((event & (PPS_CAPTUREASSERT | PPS_CAPTURECLEAR)) == 0);
 
 	dev_dbg(pps->dev, "PPS event at %ld.%09ld\n",
 			ts->ts_real.tv_sec, ts->ts_real.tv_nsec);
-- 
1.7.2.3

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