pandora: reserve CMA area for c64_tools

[pandora-kernel.git] / drivers / cpuidle / sysfs.c

diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 1e756e1..ff64887 100644 (file)
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -11,6 +11,7 @@
 #include <linux/sysfs.h>
 #include <linux/slab.h>
 #include <linux/cpu.h>
+#include <linux/capability.h>
 
 #include "cpuidle.h"
 
@@ -224,6 +225,9 @@ struct cpuidle_state_attr {
 #define define_one_state_ro(_name, show) \
 static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
 
+#define define_one_state_rw(_name, show, store) \
+static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0644, show, store)
+
 #define define_show_state_function(_name) \
 static ssize_t show_state_##_name(struct cpuidle_state *state, \
                         struct cpuidle_state_usage *state_usage, char *buf) \
@@ -231,6 +235,24 @@ static ssize_t show_state_##_name(struct cpuidle_state *state, \
        return sprintf(buf, "%u\n", state->_name);\
 }
 
+#define define_store_state_function(_name) \
+static ssize_t store_state_##_name(struct cpuidle_state *state, \
+               const char *buf, size_t size) \
+{ \
+       long value; \
+       int err; \
+       if (!capable(CAP_SYS_ADMIN)) \
+               return -EPERM; \
+       err = kstrtol(buf, 0, &value); \
+       if (err) \
+               return err; \
+       if (value) \
+               state->disable = 1; \
+       else \
+               state->disable = 0; \
+       return size; \
+}
+
 #define define_show_state_ull_function(_name) \
 static ssize_t show_state_##_name(struct cpuidle_state *state, \
                        struct cpuidle_state_usage *state_usage, char *buf) \
@@ -253,6 +275,8 @@ define_show_state_ull_function(usage)
 define_show_state_ull_function(time)
 define_show_state_str_function(name)
 define_show_state_str_function(desc)
+define_show_state_function(disable)
+define_store_state_function(disable)
 
 define_one_state_ro(name, show_state_name);
 define_one_state_ro(desc, show_state_desc);
@@ -260,6 +284,7 @@ define_one_state_ro(latency, show_state_exit_latency);
 define_one_state_ro(power, show_state_power_usage);
 define_one_state_ro(usage, show_state_usage);
 define_one_state_ro(time, show_state_time);
+define_one_state_rw(disable, show_state_disable, store_state_disable);
 
 static struct attribute *cpuidle_state_default_attrs[] = {
        &attr_name.attr,
@@ -268,6 +293,7 @@ static struct attribute *cpuidle_state_default_attrs[] = {
        &attr_power.attr,
        &attr_usage.attr,
        &attr_time.attr,
+       &attr_disable.attr,
        NULL
 };
 
@@ -289,8 +315,22 @@ static ssize_t cpuidle_state_show(struct kobject * kobj,
        return ret;
 }
 
+static ssize_t cpuidle_state_store(struct kobject *kobj,
+       struct attribute *attr, const char *buf, size_t size)
+{
+       int ret = -EIO;
+       struct cpuidle_state *state = kobj_to_state(kobj);
+       struct cpuidle_state_attr *cattr = attr_to_stateattr(attr);
+
+       if (cattr->store)
+               ret = cattr->store(state, buf, size);
+
+       return ret;
+}
+
 static const struct sysfs_ops cpuidle_state_sysfs_ops = {
        .show = cpuidle_state_show,
+       .store = cpuidle_state_store,
 };
 
 static void cpuidle_state_sysfs_release(struct kobject *kobj)