From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 22 Jan 2009 13:18:40 +0000 (+0100)
Subject: lockdep: move state bit definitions around
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9851673bc32bc9fcafbbaeffc858ead434bd6d58;p=linux-beck.git

lockdep: move state bit definitions around

For convenience later.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 6d729c9d1d27..5a58ea3e91e9 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -20,51 +20,10 @@ struct lockdep_map;
 #include <linux/stacktrace.h>
 
 /*
- * Lock-class usage-state bits:
+ * We'd rather not expose kernel/lockdep_states.h this wide, but we do need
+ * the total number of states... :-(
  */
-enum lock_usage_bit
-{
-	LOCK_USED = 0,
-	LOCK_USED_IN_HARDIRQ,
-	LOCK_USED_IN_SOFTIRQ,
-	LOCK_USED_IN_RECLAIM_FS,
-	LOCK_ENABLED_SOFTIRQ,
-	LOCK_ENABLED_HARDIRQ,
-	LOCK_ENABLED_RECLAIM_FS,
-	LOCK_USED_IN_HARDIRQ_READ,
-	LOCK_USED_IN_SOFTIRQ_READ,
-	LOCK_USED_IN_RECLAIM_FS_READ,
-	LOCK_ENABLED_SOFTIRQ_READ,
-	LOCK_ENABLED_HARDIRQ_READ,
-	LOCK_ENABLED_RECLAIM_FS_READ,
-	LOCK_USAGE_STATES
-};
-
-/*
- * Usage-state bitmasks:
- */
-#define LOCKF_USED			(1 << LOCK_USED)
-#define LOCKF_USED_IN_HARDIRQ		(1 << LOCK_USED_IN_HARDIRQ)
-#define LOCKF_USED_IN_SOFTIRQ		(1 << LOCK_USED_IN_SOFTIRQ)
-#define LOCKF_USED_IN_RECLAIM_FS	(1 << LOCK_USED_IN_RECLAIM_FS)
-#define LOCKF_ENABLED_HARDIRQ		(1 << LOCK_ENABLED_HARDIRQ)
-#define LOCKF_ENABLED_SOFTIRQ		(1 << LOCK_ENABLED_SOFTIRQ)
-#define LOCKF_ENABLED_RECLAIM_FS	(1 << LOCK_ENABLED_RECLAIM_FS)
-
-#define LOCKF_ENABLED_IRQ (LOCKF_ENABLED_HARDIRQ | LOCKF_ENABLED_SOFTIRQ)
-#define LOCKF_USED_IN_IRQ (LOCKF_USED_IN_HARDIRQ | LOCKF_USED_IN_SOFTIRQ)
-
-#define LOCKF_USED_IN_HARDIRQ_READ	(1 << LOCK_USED_IN_HARDIRQ_READ)
-#define LOCKF_USED_IN_SOFTIRQ_READ	(1 << LOCK_USED_IN_SOFTIRQ_READ)
-#define LOCKF_USED_IN_RECLAIM_FS_READ	(1 << LOCK_USED_IN_RECLAIM_FS_READ)
-#define LOCKF_ENABLED_HARDIRQ_READ	(1 << LOCK_ENABLED_HARDIRQ_READ)
-#define LOCKF_ENABLED_SOFTIRQ_READ	(1 << LOCK_ENABLED_SOFTIRQ_READ)
-#define LOCKF_ENABLED_RECLAIM_FS_READ	(1 << LOCK_ENABLED_RECLAIM_FS_READ)
-
-#define LOCKF_ENABLED_IRQ_READ \
-		(LOCKF_ENABLED_HARDIRQ_READ | LOCKF_ENABLED_SOFTIRQ_READ)
-#define LOCKF_USED_IN_IRQ_READ \
-		(LOCKF_USED_IN_HARDIRQ_READ | LOCKF_USED_IN_SOFTIRQ_READ)
+#define XXX_LOCK_USAGE_STATES		(1+3*4)
 
 #define MAX_LOCKDEP_SUBCLASSES		8UL
 
@@ -105,7 +64,7 @@ struct lock_class {
 	 * IRQ/softirq usage tracking bits:
 	 */
 	unsigned long			usage_mask;
-	struct stack_trace		usage_traces[LOCK_USAGE_STATES];
+	struct stack_trace		usage_traces[XXX_LOCK_USAGE_STATES];
 
 	/*
 	 * These fields represent a directed graph of lock dependencies,
diff --git a/kernel/lockdep_internals.h b/kernel/lockdep_internals.h
index e887b783244f..1352409cfef1 100644
--- a/kernel/lockdep_internals.h
+++ b/kernel/lockdep_internals.h
@@ -6,6 +6,52 @@
  * lockdep subsystem internal functions and variables.
  */
 
+/*
+ * Lock-class usage-state bits:
+ */
+enum lock_usage_bit {
+	LOCK_USED = 0,
+	LOCK_USED_IN_HARDIRQ,
+	LOCK_USED_IN_SOFTIRQ,
+	LOCK_USED_IN_RECLAIM_FS,
+	LOCK_ENABLED_SOFTIRQ,
+	LOCK_ENABLED_HARDIRQ,
+	LOCK_ENABLED_RECLAIM_FS,
+	LOCK_USED_IN_HARDIRQ_READ,
+	LOCK_USED_IN_SOFTIRQ_READ,
+	LOCK_USED_IN_RECLAIM_FS_READ,
+	LOCK_ENABLED_SOFTIRQ_READ,
+	LOCK_ENABLED_HARDIRQ_READ,
+	LOCK_ENABLED_RECLAIM_FS_READ,
+	LOCK_USAGE_STATES
+};
+
+/*
+ * Usage-state bitmasks:
+ */
+#define LOCKF_USED			(1 << LOCK_USED)
+#define LOCKF_USED_IN_HARDIRQ		(1 << LOCK_USED_IN_HARDIRQ)
+#define LOCKF_USED_IN_SOFTIRQ		(1 << LOCK_USED_IN_SOFTIRQ)
+#define LOCKF_USED_IN_RECLAIM_FS	(1 << LOCK_USED_IN_RECLAIM_FS)
+#define LOCKF_ENABLED_HARDIRQ		(1 << LOCK_ENABLED_HARDIRQ)
+#define LOCKF_ENABLED_SOFTIRQ		(1 << LOCK_ENABLED_SOFTIRQ)
+#define LOCKF_ENABLED_RECLAIM_FS	(1 << LOCK_ENABLED_RECLAIM_FS)
+
+#define LOCKF_ENABLED_IRQ (LOCKF_ENABLED_HARDIRQ | LOCKF_ENABLED_SOFTIRQ)
+#define LOCKF_USED_IN_IRQ (LOCKF_USED_IN_HARDIRQ | LOCKF_USED_IN_SOFTIRQ)
+
+#define LOCKF_USED_IN_HARDIRQ_READ	(1 << LOCK_USED_IN_HARDIRQ_READ)
+#define LOCKF_USED_IN_SOFTIRQ_READ	(1 << LOCK_USED_IN_SOFTIRQ_READ)
+#define LOCKF_USED_IN_RECLAIM_FS_READ	(1 << LOCK_USED_IN_RECLAIM_FS_READ)
+#define LOCKF_ENABLED_HARDIRQ_READ	(1 << LOCK_ENABLED_HARDIRQ_READ)
+#define LOCKF_ENABLED_SOFTIRQ_READ	(1 << LOCK_ENABLED_SOFTIRQ_READ)
+#define LOCKF_ENABLED_RECLAIM_FS_READ	(1 << LOCK_ENABLED_RECLAIM_FS_READ)
+
+#define LOCKF_ENABLED_IRQ_READ \
+		(LOCKF_ENABLED_HARDIRQ_READ | LOCKF_ENABLED_SOFTIRQ_READ)
+#define LOCKF_USED_IN_IRQ_READ \
+		(LOCKF_USED_IN_HARDIRQ_READ | LOCKF_USED_IN_SOFTIRQ_READ)
+
 /*
  * MAX_LOCKDEP_ENTRIES is the maximum number of lock dependencies
  * we track.
diff --git a/kernel/lockdep_states.h b/kernel/lockdep_states.h
index 937039ef2dd0..995b0cc2b84c 100644
--- a/kernel/lockdep_states.h
+++ b/kernel/lockdep_states.h
@@ -1,3 +1,9 @@
+/*
+ * Lockdep states,
+ *
+ * please update XXX_LOCK_USAGE_STATES in include/linux/lockdep.h whenever
+ * you add one, or come up with a nice dynamic solution.
+ */
 LOCKDEP_STATE(HARDIRQ)
 LOCKDEP_STATE(SOFTIRQ)
 LOCKDEP_STATE(RECLAIM_FS)