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authorDominik Brodowski <linux@dominikbrodowski.net>2011-03-27 09:04:46 -0400
committerDave Jones <davej@redhat.com>2011-05-04 11:50:57 -0400
commit2d06d8c49afdcc9bb35a85039fa50f0fe35bd40e (patch)
treed933a68fc71f6e2c3b95b744a87fa1d817bea3d6 /drivers/cpufreq/cpufreq_performance.c
parent27ecddc2a9f99ce4ac9a59a0acd77f7100b6d034 (diff)
[CPUFREQ] use dynamic debug instead of custom infrastructure
With dynamic debug having gained the capability to report debug messages also during the boot process, it offers a far superior interface for debug messages than the custom cpufreq infrastructure. As a first step, remove the old cpufreq_debug_printk() function and replace it with a call to the generic pr_debug() function. How can dynamic debug be used on cpufreq? You need a kernel which has CONFIG_DYNAMIC_DEBUG enabled. To enabled debugging during runtime, mount debugfs and $ echo -n 'module cpufreq +p' > /sys/kernel/debug/dynamic_debug/control for debugging the complete "cpufreq" module. To achieve the same goal during boot, append ddebug_query="module cpufreq +p" as a boot parameter to the kernel of your choice. For more detailled instructions, please see Documentation/dynamic-debug-howto.txt Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_performance.c')
-rw-r--r--drivers/cpufreq/cpufreq_performance.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_performance.c b/drivers/cpufreq/cpufreq_performance.c
index 7e2e515087f8..f13a8a9af6a1 100644
--- a/drivers/cpufreq/cpufreq_performance.c
+++ b/drivers/cpufreq/cpufreq_performance.c
@@ -15,9 +15,6 @@
15#include <linux/cpufreq.h> 15#include <linux/cpufreq.h>
16#include <linux/init.h> 16#include <linux/init.h>
17 17
18#define dprintk(msg...) \
19 cpufreq_debug_printk(CPUFREQ_DEBUG_GOVERNOR, "performance", msg)
20
21 18
22static int cpufreq_governor_performance(struct cpufreq_policy *policy, 19static int cpufreq_governor_performance(struct cpufreq_policy *policy,
23 unsigned int event) 20 unsigned int event)
@@ -25,7 +22,7 @@ static int cpufreq_governor_performance(struct cpufreq_policy *policy,
25 switch (event) { 22 switch (event) {
26 case CPUFREQ_GOV_START: 23 case CPUFREQ_GOV_START:
27 case CPUFREQ_GOV_LIMITS: 24 case CPUFREQ_GOV_LIMITS:
28 dprintk("setting to %u kHz because of event %u\n", 25 pr_debug("setting to %u kHz because of event %u\n",
29 policy->max, event); 26 policy->max, event);
30 __cpufreq_driver_target(policy, policy->max, 27 __cpufreq_driver_target(policy, policy->max,
31 CPUFREQ_RELATION_H); 28 CPUFREQ_RELATION_H);