linux-kernel - [patch 1/3] x86, bts: turn BUG_ON into WARN_ON

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Message-ID: <20081211134523.A13571@sedona.ch.intel.com>
Date:	Thu, 11 Dec 2008 13:45:23 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	hpa@...or.com, linux-kernel@...r.kernel.org, mingo@...e.hu,
	tglx@...utronix.de
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	roland@...hat.com, akpm@...ux-foundation.org,
	eranian@...glemail.com
Subject: [patch 1/3] x86, bts: turn BUG_ON into WARN_ON_ONCE

Turn BUG_ON's into WARN_ON_ONCE.

Signed-off-by: Markus Metzger <markus.t.metzger@...el.com>
---

Index: ftrace/arch/x86/kernel/ds.c
===================================================================
--- ftrace.orig/arch/x86/kernel/ds.c	2008-12-08 09:42:53.000000000 +0100
+++ ftrace/arch/x86/kernel/ds.c	2008-12-08 13:29:03.000000000 +0100
@@ -452,7 +452,7 @@
 
 static void ds_release(struct ds_tracer *tracer, enum ds_qualifier qual)
 {
-	BUG_ON(tracer->context->owner[qual] != tracer);
+	WARN_ON_ONCE(tracer->context->owner[qual] != tracer);
 	tracer->context->owner[qual] = NULL;
 
 	put_tracer(tracer->context->task);
@@ -774,7 +774,7 @@
 
 	printk(KERN_INFO "DS available\n");
 
-	BUG_ON(MAX_SIZEOF_DS < ds_cfg.sizeof_ds);
+	WARN_ON_ONCE(MAX_SIZEOF_DS < ds_cfg.sizeof_ds);
 }
 
 void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
Index: ftrace/arch/x86/kernel/ptrace.c
===================================================================
--- ftrace.orig/arch/x86/kernel/ptrace.c	2008-12-08 09:42:53.000000000 +0100
+++ ftrace/arch/x86/kernel/ptrace.c	2008-12-08 13:29:03.000000000 +0100
@@ -878,7 +878,8 @@
 {
 	unsigned char bts_record[BTS_MAX_RECORD_SIZE];
 
-	BUG_ON(BTS_MAX_RECORD_SIZE < bts_cfg.sizeof_bts);
+	if (BTS_MAX_RECORD_SIZE < bts_cfg.sizeof_bts)
+		return -EOVERFLOW;
 
 	memset(bts_record, 0, bts_cfg.sizeof_bts);
 	switch (in->qualifier) {
@@ -1133,7 +1134,7 @@
 
 		ret = ds_get_bts_index(child->bts, &size);
 		if (ret == 0) {
-			BUG_ON(size != (int) size);
+			WARN_ON_ONCE(size != (int) size);
 			ret = (int) size;
 		}
 		break;
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