linux-kernel - [patch 10/14] x86, ds: add ds selftests for task tracing

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Message-ID: <20090327101917.A11582@sedona.ch.intel.com>
Date:	Fri, 27 Mar 2009 10:19:17 +0100
From:	Markus Metzger <markus.t.metzger@...el.com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com
Cc:	markus.t.metzger@...el.com, markus.t.metzger@...il.com,
	roland@...hat.com, eranian@...glemail.com, oleg@...hat.com,
	juan.villacis@...el.com, ak@...ux.jf.intel.com
Subject: [patch 10/14] x86, ds: add ds selftests for task tracing

Add selftests for tracing the current task.


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

Index: git-tip/arch/x86/kernel/ds_selftest.c
===================================================================
--- git-tip.orig/arch/x86/kernel/ds_selftest.c	2009-03-26 10:39:24.000000000 +0100
+++ git-tip/arch/x86/kernel/ds_selftest.c	2009-03-26 10:39:25.000000000 +0100
@@ -284,6 +284,7 @@ int ds_selftest_bts(void)
 {
 	struct ds_selftest_bts_conf conf;
 	unsigned char buffer[BUFFER_SIZE];
+	unsigned long irq;
 	int cpu;
 
 	printk(KERN_INFO "[ds] bts selftest...");
@@ -321,6 +322,28 @@ int ds_selftest_bts(void)
 			goto out;
 	}
 
+	conf.suspend = ds_suspend_bts_wrap;
+	conf.resume = ds_resume_bts_wrap;
+	conf.tracer =
+		ds_request_bts_task(current, buffer, BUFFER_SIZE,
+				    NULL, (size_t)-1, BTS_KERNEL);
+	ds_selftest_bts_cpu(&conf);
+	ds_release_bts(conf.tracer);
+	if (conf.error < 0)
+		goto out;
+
+	conf.suspend = ds_suspend_bts_noirq;
+	conf.resume = ds_resume_bts_noirq;
+	conf.tracer =
+		ds_request_bts_task(current, buffer, BUFFER_SIZE,
+				   NULL, (size_t)-1, BTS_KERNEL);
+	local_irq_save(irq);
+	ds_selftest_bts_cpu(&conf);
+	ds_release_bts_noirq(conf.tracer);
+	local_irq_restore(irq);
+	if (conf.error < 0)
+		goto out;
+
 	conf.error = 0;
  out:
 	put_online_cpus();
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