pm_qos: Get rid of the allocation in pm_qos_add_request()

All current users of pm_qos_add_request() have the ability to supply
the memory required by the pm_qos routines, so make them do this and
eliminate the kmalloc() with pm_qos_add_request().  This has the
double benefit of making the call never fail and allowing it to be
called from atomic context.

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: mark gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 10 insertions, 3 deletions

diff --git a/include/linux/pm_qos_params.h b/include/linux/pm_qos_params.h
index 8ba440e5eb7..77cbddb3784 100644
--- a/include/linux/pm_qos_params.h
+++ b/include/linux/pm_qos_params.h
@@ -1,8 +1,10 @@
+#ifndef _LINUX_PM_QOS_PARAMS_H
+#define _LINUX_PM_QOS_PARAMS_H
 /* interface for the pm_qos_power infrastructure of the linux kernel.
  *
  * Mark Gross <mgross@linux.intel.com>
  */
-#include <linux/list.h>
+#include <linux/plist.h>
 #include <linux/notifier.h>
 #include <linux/miscdevice.h>
 
@@ -14,9 +16,12 @@
 #define PM_QOS_NUM_CLASSES 4
 #define PM_QOS_DEFAULT_VALUE -1
 
-struct pm_qos_request_list;
+struct pm_qos_request_list {
+        struct plist_node list;
+        int pm_qos_class;
+};
 
-struct pm_qos_request_list *pm_qos_add_request(int pm_qos_class, s32 value);
+void pm_qos_add_request(struct pm_qos_request_list *l, int pm_qos_class, s32 value);
 void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
                 s32 new_value);
 void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req);
@@ -24,4 +29,6 @@ void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_req);
 int pm_qos_request(int pm_qos_class);
 int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
 int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
+int pm_qos_request_active(struct pm_qos_request_list *req);
 
+#endif