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[PATCH] lockdep: locking init debugging improvement

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Locking init improvement:

 - introduce and use __SPIN_LOCK_UNLOCKED for array initializations,
   to pass in the name string of locks, used by debugging

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-07-03 00:24:34 -07:00 committed by Linus Torvalds
parent 9cebb55268
commit e4d9191885
13 changed files with 37 additions and 26 deletions
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6
drivers/char/random.c
View file

@ -416,7 +416,7 @@ static struct entropy_store input_pool = {
.poolinfo = &poolinfo_table[0],
.name = "input",
.limit = 1,
.lock = SPIN_LOCK_UNLOCKED,
.lock = __SPIN_LOCK_UNLOCKED(&input_pool.lock),
.pool = input_pool_data
};
@ -425,7 +425,7 @@ static struct entropy_store blocking_pool = {
.name = "blocking",
.limit = 1,
.pull = &input_pool,
.lock = SPIN_LOCK_UNLOCKED,
.lock = __SPIN_LOCK_UNLOCKED(&blocking_pool.lock),
.pool = blocking_pool_data
};
@ -433,7 +433,7 @@ static struct entropy_store nonblocking_pool = {
.poolinfo = &poolinfo_table[1],
.name = "nonblocking",
.pull = &input_pool,
.lock = SPIN_LOCK_UNLOCKED,
.lock = __SPIN_LOCK_UNLOCKED(&nonblocking_pool.lock),
.pool = nonblocking_pool_data
};

2
fs/dcache.c
View file

@ -38,7 +38,7 @@ int sysctl_vfs_cache_pressure __read_mostly = 100;
EXPORT_SYMBOL_GPL(sysctl_vfs_cache_pressure);
__cacheline_aligned_in_smp DEFINE_SPINLOCK(dcache_lock);
static seqlock_t rename_lock __cacheline_aligned_in_smp = SEQLOCK_UNLOCKED;
static __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock);
EXPORT_SYMBOL(dcache_lock);

2
include/linux/idr.h
View file

@ -66,7 +66,7 @@ struct idr {
.id_free = NULL, \
.layers = 0, \
.id_free_cnt = 0, \
.lock = SPIN_LOCK_UNLOCKED, \
.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
}
#define DEFINE_IDR(name) struct idr name = IDR_INIT(name)

10
include/linux/init_task.h
View file

@ -21,7 +21,7 @@
.count = ATOMIC_INIT(1), \
.fdt = &init_files.fdtab, \
.fdtab = INIT_FDTABLE, \
.file_lock = SPIN_LOCK_UNLOCKED, \
.file_lock = __SPIN_LOCK_UNLOCKED(init_task.file_lock), \
.next_fd = 0, \
.close_on_exec_init = { { 0, } }, \
.open_fds_init = { { 0, } }, \
@ -36,7 +36,7 @@
.user_id = 0, \
.next = NULL, \
.wait = __WAIT_QUEUE_HEAD_INITIALIZER(name.wait), \
.ctx_lock = SPIN_LOCK_UNLOCKED, \
.ctx_lock = __SPIN_LOCK_UNLOCKED(name.ctx_lock), \
.reqs_active = 0U, \
.max_reqs = ~0U, \
}
@ -48,7 +48,7 @@
.mm_users = ATOMIC_INIT(2), \
.mm_count = ATOMIC_INIT(1), \
.mmap_sem = __RWSEM_INITIALIZER(name.mmap_sem), \
.page_table_lock = SPIN_LOCK_UNLOCKED, \
.page_table_lock = __SPIN_LOCK_UNLOCKED(name.page_table_lock), \
.mmlist = LIST_HEAD_INIT(name.mmlist), \
.cpu_vm_mask = CPU_MASK_ALL, \
}
@ -69,7 +69,7 @@
#define INIT_SIGHAND(sighand) { \
.count = ATOMIC_INIT(1), \
.action = { { { .sa_handler = NULL, } }, }, \
.siglock = SPIN_LOCK_UNLOCKED, \
.siglock = __SPIN_LOCK_UNLOCKED(sighand.siglock), \
}
extern struct group_info init_groups;
@ -119,7 +119,7 @@ extern struct group_info init_groups;
.list = LIST_HEAD_INIT(tsk.pending.list), \
.signal = {{0}}}, \
.blocked = {{0}}, \
.alloc_lock = SPIN_LOCK_UNLOCKED, \
.alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
.journal_info = NULL, \
.cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
.fs_excl = ATOMIC_INIT(0), \

2
include/linux/notifier.h
View file

@ -65,7 +65,7 @@ struct raw_notifier_head {
} while (0)
#define ATOMIC_NOTIFIER_INIT(name) { \
.lock = SPIN_LOCK_UNLOCKED, \
.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
.head = NULL }
#define BLOCKING_NOTIFIER_INIT(name) { \
.rwsem = __RWSEM_INITIALIZER((name).rwsem), \

12
include/linux/seqlock.h
View file

@ -38,9 +38,17 @@ typedef struct {
* These macros triggered gcc-3.x compile-time problems. We think these are
* OK now. Be cautious.
*/
#define SEQLOCK_UNLOCKED { 0, SPIN_LOCK_UNLOCKED }
#define seqlock_init(x) do { *(x) = (seqlock_t) SEQLOCK_UNLOCKED; } while (0)
#define __SEQLOCK_UNLOCKED(lockname) \
{ 0, __SPIN_LOCK_UNLOCKED(lockname) }
#define SEQLOCK_UNLOCKED \
__SEQLOCK_UNLOCKED(old_style_seqlock_init)
#define seqlock_init(x) \
do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0)
#define DEFINE_SEQLOCK(x) \
seqlock_t x = __SEQLOCK_UNLOCKED(x)
/* Lock out other writers and update the count.
* Acts like a normal spin_lock/unlock.

15
include/linux/spinlock_types.h
View file

@ -44,24 +44,27 @@ typedef struct {
#define SPINLOCK_OWNER_INIT ((void *)-1L)
#ifdef CONFIG_DEBUG_SPINLOCK
# define SPIN_LOCK_UNLOCKED \
# define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
.magic = SPINLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
.owner_cpu = -1 }
#define RW_LOCK_UNLOCKED \
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
.magic = RWLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
.owner_cpu = -1 }
#else
# define SPIN_LOCK_UNLOCKED \
# define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
#define RW_LOCK_UNLOCKED \
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
#endif
#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
#endif /* __LINUX_SPINLOCK_TYPES_H */

2
include/linux/wait.h
View file

@ -68,7 +68,7 @@ struct task_struct;
wait_queue_t name = __WAITQUEUE_INITIALIZER(name, tsk)
#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
.lock = SPIN_LOCK_UNLOCKED, \
.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
.task_list = { &(name).task_list, &(name).task_list } }
#define DECLARE_WAIT_QUEUE_HEAD(name) \

4
kernel/rcupdate.c
View file

@ -53,13 +53,13 @@
static struct rcu_ctrlblk rcu_ctrlblk = {
.cur = -300,
.completed = -300,
.lock = SPIN_LOCK_UNLOCKED,
.lock = __SPIN_LOCK_UNLOCKED(&rcu_ctrlblk.lock),
.cpumask = CPU_MASK_NONE,
};
static struct rcu_ctrlblk rcu_bh_ctrlblk = {
.cur = -300,
.completed = -300,
.lock = SPIN_LOCK_UNLOCKED,
.lock = __SPIN_LOCK_UNLOCKED(&rcu_bh_ctrlblk.lock),
.cpumask = CPU_MASK_NONE,
};

2
kernel/timer.c
View file

@ -1208,7 +1208,7 @@ unsigned long wall_jiffies = INITIAL_JIFFIES;
* playing with xtime and avenrun.
*/
#ifndef ARCH_HAVE_XTIME_LOCK
seqlock_t xtime_lock __cacheline_aligned_in_smp = SEQLOCK_UNLOCKED;
__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
EXPORT_SYMBOL(xtime_lock);
#endif

2
mm/swap_state.c
View file

@ -38,7 +38,7 @@ static struct backing_dev_info swap_backing_dev_info = {
struct address_space swapper_space = {
.page_tree = RADIX_TREE_INIT(GFP_ATOMIC|__GFP_NOWARN),
.tree_lock = RW_LOCK_UNLOCKED,
.tree_lock = __RW_LOCK_UNLOCKED(swapper_space.tree_lock),
.a_ops = &swap_aops,
.i_mmap_nonlinear = LIST_HEAD_INIT(swapper_space.i_mmap_nonlinear),
.backing_dev_info = &swap_backing_dev_info,

2
net/ipv4/tcp_ipv4.c
View file

@ -90,7 +90,7 @@ static struct socket *tcp_socket;
void tcp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
.lhash_lock = RW_LOCK_UNLOCKED,
.lhash_lock = __RW_LOCK_UNLOCKED(tcp_hashinfo.lhash_lock),
.lhash_users = ATOMIC_INIT(0),
.lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(tcp_hashinfo.lhash_wait),
};

2
net/ipv4/tcp_minisocks.c
View file

@ -40,7 +40,7 @@ int sysctl_tcp_abort_on_overflow;
struct inet_timewait_death_row tcp_death_row = {
.sysctl_max_tw_buckets = NR_FILE * 2,
.period = TCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS,
.death_lock = SPIN_LOCK_UNLOCKED,
.death_lock = __SPIN_LOCK_UNLOCKED(tcp_death_row.death_lock),
.hashinfo = &tcp_hashinfo,
.tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0,
(unsigned long)&tcp_death_row),