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Commit 9851673b authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

lockdep: move state bit definitions around 



For convenience later.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 5346417e

include/linux/lockdep.h

+4 −45
Original line number Diff line number Diff line
@@ -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,

kernel/lockdep_internals.h

+46 −0
Original line number Diff line number Diff line
@@ -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.

kernel/lockdep_states.h

+6 −0
Original line number Diff line number Diff line 
/*

 * 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)