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authorIngo Molnar <mingo@elte.hu>2006-07-03 00:24:34 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:02 -0700
commite4d919188554a77c798a267e098059bc9aa39726 (patch)
treebb5e47e09f5d107db44358ad668988f5ae768ade
parent9cebb5526833059f327d237a032422c762378b2a (diff)
downloadlinux-e4d919188554a77c798a267e098059bc9aa39726.tar.gz
[PATCH] lockdep: locking init debugging improvement
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>
-rw-r--r--drivers/char/random.c6
-rw-r--r--fs/dcache.c2
-rw-r--r--include/linux/idr.h2
-rw-r--r--include/linux/init_task.h10
-rw-r--r--include/linux/notifier.h2
-rw-r--r--include/linux/seqlock.h12
-rw-r--r--include/linux/spinlock_types.h15
-rw-r--r--include/linux/wait.h2
-rw-r--r--kernel/rcupdate.c4
-rw-r--r--kernel/timer.c2
-rw-r--r--mm/swap_state.c2
-rw-r--r--net/ipv4/tcp_ipv4.c2
-rw-r--r--net/ipv4/tcp_minisocks.c2
13 files changed, 37 insertions, 26 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 164bddae047..4c3a5ca9d8f 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -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
};
diff --git a/fs/dcache.c b/fs/dcache.c
index c6e3535be19..bec4de176c8 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -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);
diff --git a/include/linux/idr.h b/include/linux/idr.h
index f559a719dbe..826803449db 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -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)
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 678c1a90380..1b7bb37624b 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -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), \
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 51dbab9710c..7ff386a6ae8 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -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), \
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index 7bc5c7c12b5..46000936f8f 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -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.
diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
index 9cb51e07039..f5d4ed7bc78 100644
--- a/include/linux/spinlock_types.h
+++ b/include/linux/spinlock_types.h
@@ -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 */
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 544e855c7c0..bc4f389c49b 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -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) \
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index f464f5ae3f1..759805c9859 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -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,
};
diff --git a/kernel/timer.c b/kernel/timer.c
index 5a896025306..4dd9a10d67d 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -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
diff --git a/mm/swap_state.c b/mm/swap_state.c
index fccbd9bba77..5f7cf2a4cb5 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -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,
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 8355b729fa9..823717285c6 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -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),
};
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index e0851697ad5..0ccb7cb22b1 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -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),