aboutsummaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
Diffstat (limited to 'include')
-rw-r--r--include/linux/lockdep.h16
1 files changed, 9 insertions, 7 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index f270ce1582f..b49bfa8e4a5 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -190,6 +190,9 @@ struct lock_chain {
u64 chain_key;
};
+#define MAX_LOCKDEP_KEYS_BITS 11
+#define MAX_LOCKDEP_KEYS (1UL << MAX_LOCKDEP_KEYS_BITS)
+
struct held_lock {
/*
* One-way hash of the dependency chain up to this point. We
@@ -206,14 +209,13 @@ struct held_lock {
* with zero), here we store the previous hash value:
*/
u64 prev_chain_key;
- struct lock_class *class;
unsigned long acquire_ip;
struct lockdep_map *instance;
-
#ifdef CONFIG_LOCK_STAT
u64 waittime_stamp;
u64 holdtime_stamp;
#endif
+ unsigned int class_idx:MAX_LOCKDEP_KEYS_BITS;
/*
* The lock-stack is unified in that the lock chains of interrupt
* contexts nest ontop of process context chains, but we 'separate'
@@ -227,11 +229,11 @@ struct held_lock {
* The following field is used to detect when we cross into an
* interrupt context:
*/
- int irq_context;
- int trylock;
- int read;
- int check;
- int hardirqs_off;
+ unsigned int irq_context:2; /* bit 0 - soft, bit 1 - hard */
+ unsigned int trylock:1;
+ unsigned int read:2; /* see lock_acquire() comment */
+ unsigned int check:2; /* see lock_acquire() comment */
+ unsigned int hardirqs_off:1;
};
/*