[PATCH] cpufreq_conservative/ondemand: invert meaning of 'ignore nice'

The use of the 'ignore_nice' sysfs file is confusing to anyone using it.
This removes the sysfs file 'ignore_nice' and in its place creates a
'ignore_nice_load' entry that defaults to '0'; meaning nice'd processes
_are_ counted towards the 'business' calculation.

WARNING: this obvious breaks any userland tools that expected ignore_nice'
to exist, to draw attention to this fact it was concluded on the mailing
list that the entry should be removed altogether so the userland app breaks
and so the author can build simple to detect workaround.  Having said that
it seems currently very few tools even make use of this functionality; all
I could find was a Gentoo Wiki entry.

Signed-off-by: Alexander Clouter <alex-kernel@digriz.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/cpufreq/cpufreq_conservative.c

@@ -93,7 +93,7 @@ static inline unsigned int get_cpu_idle_time(unsigned int cpu)
 {
 	return	kstat_cpu(cpu).cpustat.idle +
 		kstat_cpu(cpu).cpustat.iowait +
-		( !dbs_tuners_ins.ignore_nice ? 
+		( dbs_tuners_ins.ignore_nice ?
 		  kstat_cpu(cpu).cpustat.nice :
 		  0);
 }
@@ -127,7 +127,7 @@ show_one(sampling_rate, sampling_rate);
 show_one(sampling_down_factor, sampling_down_factor);
 show_one(up_threshold, up_threshold);
 show_one(down_threshold, down_threshold);
-show_one(ignore_nice, ignore_nice);
+show_one(ignore_nice_load, ignore_nice);
 show_one(freq_step, freq_step);
 
 static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, 
@@ -207,7 +207,7 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused,
 	return count;
 }
 
-static ssize_t store_ignore_nice(struct cpufreq_policy *policy,
+static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
 		const char *buf, size_t count)
 {
 	unsigned int input;
@@ -272,7 +272,7 @@ define_one_rw(sampling_rate);
 define_one_rw(sampling_down_factor);
 define_one_rw(up_threshold);
 define_one_rw(down_threshold);
-define_one_rw(ignore_nice);
+define_one_rw(ignore_nice_load);
 define_one_rw(freq_step);
 
 static struct attribute * dbs_attributes[] = {
@@ -282,7 +282,7 @@ static struct attribute * dbs_attributes[] = {
 	&sampling_down_factor.attr,
 	&up_threshold.attr,
 	&down_threshold.attr,
-	&ignore_nice.attr,
+	&ignore_nice_load.attr,
 	&freq_step.attr,
 	NULL
 };

drivers/cpufreq/cpufreq_ondemand.c

@@ -89,7 +89,7 @@ static inline unsigned int get_cpu_idle_time(unsigned int cpu)
 {
 	return	kstat_cpu(cpu).cpustat.idle +
 		kstat_cpu(cpu).cpustat.iowait +
-		( !dbs_tuners_ins.ignore_nice ? 
+		( dbs_tuners_ins.ignore_nice ?
 		  kstat_cpu(cpu).cpustat.nice :
 		  0);
 }
@@ -122,7 +122,7 @@ static ssize_t show_##file_name						\
 show_one(sampling_rate, sampling_rate);
 show_one(sampling_down_factor, sampling_down_factor);
 show_one(up_threshold, up_threshold);
-show_one(ignore_nice, ignore_nice);
+show_one(ignore_nice_load, ignore_nice);
 
 static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, 
 		const char *buf, size_t count)
@@ -182,7 +182,7 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused,
 	return count;
 }
 
-static ssize_t store_ignore_nice(struct cpufreq_policy *policy,
+static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy,
 		const char *buf, size_t count)
 {
 	unsigned int input;
@@ -223,7 +223,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name)
 define_one_rw(sampling_rate);
 define_one_rw(sampling_down_factor);
 define_one_rw(up_threshold);
-define_one_rw(ignore_nice);
+define_one_rw(ignore_nice_load);
 
 static struct attribute * dbs_attributes[] = {
 	&sampling_rate_max.attr,
@@ -231,7 +231,7 @@ static struct attribute * dbs_attributes[] = {
 	&sampling_rate.attr,
 	&sampling_down_factor.attr,
 	&up_threshold.attr,
-	&ignore_nice.attr,
+	&ignore_nice_load.attr,
 	NULL
 };