PM / Sleep: Make the limit of user space wakeup sources configurable
Make it possible to configure out the check against the limit of
user space wakeup sources for debugging and default Android builds.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Arve Hjønnevåg <arve@android.com>
diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c
index 5797006..dc34b9d3b 100644
--- a/kernel/power/wakelock.c
+++ b/kernel/power/wakelock.c
@@ -17,7 +17,6 @@
#include <linux/rbtree.h>
#include <linux/slab.h>
-#define WL_NUMBER_LIMIT 100
#define WL_GC_COUNT_MAX 100
#define WL_GC_TIME_SEC 300
@@ -32,7 +31,6 @@
static struct rb_root wakelocks_tree = RB_ROOT;
static LIST_HEAD(wakelocks_lru_list);
-static unsigned int number_of_wakelocks;
static unsigned int wakelocks_gc_count;
ssize_t pm_show_wakelocks(char *buf, bool show_active)
@@ -58,6 +56,29 @@
return (str - buf);
}
+#if CONFIG_PM_WAKELOCKS_LIMIT > 0
+static unsigned int number_of_wakelocks;
+
+static inline bool wakelocks_limit_exceeded(void)
+{
+ return number_of_wakelocks > CONFIG_PM_WAKELOCKS_LIMIT;
+}
+
+static inline void increment_wakelocks_number(void)
+{
+ number_of_wakelocks++;
+}
+
+static inline void decrement_wakelocks_number(void)
+{
+ number_of_wakelocks--;
+}
+#else /* CONFIG_PM_WAKELOCKS_LIMIT = 0 */
+static inline bool wakelocks_limit_exceeded(void) { return false; }
+static inline void increment_wakelocks_number(void) {}
+static inline void decrement_wakelocks_number(void) {}
+#endif /* CONFIG_PM_WAKELOCKS_LIMIT */
+
static struct wakelock *wakelock_lookup_add(const char *name, size_t len,
bool add_if_not_found)
{
@@ -85,7 +106,7 @@
if (!add_if_not_found)
return ERR_PTR(-EINVAL);
- if (number_of_wakelocks > WL_NUMBER_LIMIT)
+ if (wakelocks_limit_exceeded())
return ERR_PTR(-ENOSPC);
/* Not found, we have to add a new one. */
@@ -103,7 +124,7 @@
rb_link_node(&wl->node, parent, node);
rb_insert_color(&wl->node, &wakelocks_tree);
list_add(&wl->lru, &wakelocks_lru_list);
- number_of_wakelocks++;
+ increment_wakelocks_number();
return wl;
}
@@ -175,7 +196,7 @@
list_del(&wl->lru);
kfree(wl->name);
kfree(wl);
- number_of_wakelocks--;
+ decrement_wakelocks_number();
}
}
wakelocks_gc_count = 0;