Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / rwlock_types.h

diff --git a/kernel/include/linux/rwlock_types.h b/kernel/include/linux/rwlock_types.h
new file mode 100644 (file)
index 0000000..d0da966
--- /dev/null
+++ b/kernel/include/linux/rwlock_types.h
@@ -0,0 +1,53 @@
+#ifndef __LINUX_RWLOCK_TYPES_H
+#define __LINUX_RWLOCK_TYPES_H
+
+#if !defined(__LINUX_SPINLOCK_TYPES_H)
+# error "Do not include directly, include spinlock_types.h"
+#endif
+
+/*
+ * include/linux/rwlock_types.h - generic rwlock type definitions
+ *                               and initializers
+ *
+ * portions Copyright 2005, Red Hat, Inc., Ingo Molnar
+ * Released under the General Public License (GPL).
+ */
+typedef struct {
+       arch_rwlock_t raw_lock;
+#ifdef CONFIG_GENERIC_LOCKBREAK
+       unsigned int break_lock;
+#endif
+#ifdef CONFIG_DEBUG_SPINLOCK
+       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
+
+#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 __RW_LOCK_UNLOCKED(lockname)                                   \
+       (rwlock_t)      {       .raw_lock = __ARCH_RW_LOCK_UNLOCKED,    \
+                               .magic = RWLOCK_MAGIC,                  \
+                               .owner = SPINLOCK_OWNER_INIT,           \
+                               .owner_cpu = -1,                        \
+                               RW_DEP_MAP_INIT(lockname) }
+#else
+#define __RW_LOCK_UNLOCKED(lockname) \
+       (rwlock_t)      {       .raw_lock = __ARCH_RW_LOCK_UNLOCKED,    \
+                               RW_DEP_MAP_INIT(lockname) }
+#endif
+
+#define DEFINE_RWLOCK(name) \
+       rwlock_t name __cacheline_aligned_in_smp = __RW_LOCK_UNLOCKED(name)
+
+#endif /* __LINUX_RWLOCK_TYPES_H */