Revert "[NET]: Fix races in net_rx_action vs netpoll."

[linux-2.6-omap-h63xx.git] / include / linux / spinlock_types.h

diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
index f5d4ed7bc785eb7e534b10abb75169319531c609..210549ba4ef4b8a0fad84e8760ef6c84ec23ec9e 100644 (file)
--- a/include/linux/spinlock_types.h
+++ b/include/linux/spinlock_types.h
@@ -9,6 +9,8 @@
  * Released under the General Public License (GPL).
  */
 
+#include <linux/lockdep.h>
+
 #if defined(CONFIG_SMP)
 # include <asm/spinlock_types.h>
 #else
@@ -24,6 +26,9 @@ typedef struct {
        unsigned int magic, owner_cpu;
        void *owner;
 #endif
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+       struct lockdep_map dep_map;
+#endif
 } spinlock_t;
 
 #define SPINLOCK_MAGIC         0xdead4ead
@@ -37,30 +42,55 @@ typedef struct {
        unsigned int magic, owner_cpu;
        void *owner;
 #endif
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+       struct lockdep_map dep_map;
+#endif
 } rwlock_t;
 
 #define RWLOCK_MAGIC           0xdeaf1eed
 
 #define SPINLOCK_OWNER_INIT    ((void *)-1L)
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define SPIN_DEP_MAP_INIT(lockname)   .dep_map = { .name = #lockname }
+#else
+# define SPIN_DEP_MAP_INIT(lockname)
+#endif
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define RW_DEP_MAP_INIT(lockname)     .dep_map = { .name = #lockname }
+#else
+# define RW_DEP_MAP_INIT(lockname)
+#endif
+
 #ifdef CONFIG_DEBUG_SPINLOCK
 # define __SPIN_LOCK_UNLOCKED(lockname)                                        \
        (spinlock_t)    {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED,   \
                                .magic = SPINLOCK_MAGIC,                \
                                .owner = SPINLOCK_OWNER_INIT,           \
-                               .owner_cpu = -1 }
+                               .owner_cpu = -1,                        \
+                               SPIN_DEP_MAP_INIT(lockname) }
 #define __RW_LOCK_UNLOCKED(lockname)                                   \
        (rwlock_t)      {       .raw_lock = __RAW_RW_LOCK_UNLOCKED,     \
                                .magic = RWLOCK_MAGIC,                  \
                                .owner = SPINLOCK_OWNER_INIT,           \
-                               .owner_cpu = -1 }
+                               .owner_cpu = -1,                        \
+                               RW_DEP_MAP_INIT(lockname) }
 #else
 # define __SPIN_LOCK_UNLOCKED(lockname) \
-       (spinlock_t)    {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
+       (spinlock_t)    {       .raw_lock = __RAW_SPIN_LOCK_UNLOCKED,   \
+                               SPIN_DEP_MAP_INIT(lockname) }
 #define __RW_LOCK_UNLOCKED(lockname) \
-       (rwlock_t)      {       .raw_lock = __RAW_RW_LOCK_UNLOCKED }
+       (rwlock_t)      {       .raw_lock = __RAW_RW_LOCK_UNLOCKED,     \
+                               RW_DEP_MAP_INIT(lockname) }
 #endif
 
+/*
+ * SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and
+ * are hence deprecated.
+ * Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
+ * __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate.
+ */
 #define SPIN_LOCK_UNLOCKED     __SPIN_LOCK_UNLOCKED(old_style_spin_init)
 #define RW_LOCK_UNLOCKED       __RW_LOCK_UNLOCKED(old_style_rw_init)