lockdep: various fixes
- update the copyright notices - use the default hash function - fix a thinko in a BUILD_BUG_ON - add a WARN_ON to spot inconsitent naming - fix a termination issue in /proc/lock_stat [akpm@linux-foundation.org: cleanups] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Родитель
4fe87745a6
Коммит
4b32d0a4e9
|
@ -1,7 +1,8 @@
|
|||
/*
|
||||
* Runtime locking correctness validator
|
||||
*
|
||||
* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
|
||||
*
|
||||
* see Documentation/lockdep-design.txt for more details.
|
||||
*/
|
||||
|
|
|
@ -5,7 +5,8 @@
|
|||
*
|
||||
* Started by Ingo Molnar:
|
||||
*
|
||||
* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
|
||||
*
|
||||
* this code maps all the lock dependencies as they occur in a live kernel
|
||||
* and will warn about the following classes of locking bugs:
|
||||
|
@ -37,6 +38,7 @@
|
|||
#include <linux/debug_locks.h>
|
||||
#include <linux/irqflags.h>
|
||||
#include <linux/utsname.h>
|
||||
#include <linux/hash.h>
|
||||
|
||||
#include <asm/sections.h>
|
||||
|
||||
|
@ -238,8 +240,7 @@ LIST_HEAD(all_lock_classes);
|
|||
*/
|
||||
#define CLASSHASH_BITS (MAX_LOCKDEP_KEYS_BITS - 1)
|
||||
#define CLASSHASH_SIZE (1UL << CLASSHASH_BITS)
|
||||
#define CLASSHASH_MASK (CLASSHASH_SIZE - 1)
|
||||
#define __classhashfn(key) ((((unsigned long)key >> CLASSHASH_BITS) + (unsigned long)key) & CLASSHASH_MASK)
|
||||
#define __classhashfn(key) hash_long((unsigned long)key, CLASSHASH_BITS)
|
||||
#define classhashentry(key) (classhash_table + __classhashfn((key)))
|
||||
|
||||
static struct list_head classhash_table[CLASSHASH_SIZE];
|
||||
|
@ -250,9 +251,7 @@ static struct list_head classhash_table[CLASSHASH_SIZE];
|
|||
*/
|
||||
#define CHAINHASH_BITS (MAX_LOCKDEP_CHAINS_BITS-1)
|
||||
#define CHAINHASH_SIZE (1UL << CHAINHASH_BITS)
|
||||
#define CHAINHASH_MASK (CHAINHASH_SIZE - 1)
|
||||
#define __chainhashfn(chain) \
|
||||
(((chain >> CHAINHASH_BITS) + chain) & CHAINHASH_MASK)
|
||||
#define __chainhashfn(chain) hash_long(chain, CHAINHASH_BITS)
|
||||
#define chainhashentry(chain) (chainhash_table + __chainhashfn((chain)))
|
||||
|
||||
static struct list_head chainhash_table[CHAINHASH_SIZE];
|
||||
|
@ -676,7 +675,8 @@ look_up_lock_class(struct lockdep_map *lock, unsigned int subclass)
|
|||
* (or spin_lock_init()) call - which acts as the key. For static
|
||||
* locks we use the lock object itself as the key.
|
||||
*/
|
||||
BUILD_BUG_ON(sizeof(struct lock_class_key) > sizeof(struct lock_class));
|
||||
BUILD_BUG_ON(sizeof(struct lock_class_key) >
|
||||
sizeof(struct lockdep_map));
|
||||
|
||||
key = lock->key->subkeys + subclass;
|
||||
|
||||
|
@ -686,9 +686,12 @@ look_up_lock_class(struct lockdep_map *lock, unsigned int subclass)
|
|||
* We can walk the hash lockfree, because the hash only
|
||||
* grows, and we are careful when adding entries to the end:
|
||||
*/
|
||||
list_for_each_entry(class, hash_head, hash_entry)
|
||||
if (class->key == key)
|
||||
list_for_each_entry(class, hash_head, hash_entry) {
|
||||
if (class->key == key) {
|
||||
WARN_ON_ONCE(class->name != lock->name);
|
||||
return class;
|
||||
}
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
|
|
@ -5,7 +5,8 @@
|
|||
*
|
||||
* Started by Ingo Molnar:
|
||||
*
|
||||
* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2006,2007 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
||||
* Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra <pzijlstr@redhat.com>
|
||||
*
|
||||
* Code for /proc/lockdep and /proc/lockdep_stats:
|
||||
*
|
||||
|
@ -498,6 +499,9 @@ static void *ls_start(struct seq_file *m, loff_t *pos)
|
|||
if (data->iter == data->stats)
|
||||
seq_header(m);
|
||||
|
||||
if (data->iter == data->iter_end)
|
||||
data->iter = NULL;
|
||||
|
||||
return data->iter;
|
||||
}
|
||||
|
||||
|
|
Загрузка…
Ссылка в новой задаче