Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_SPINLOCK_TYPES_H |
| 2 | #define __LINUX_SPINLOCK_TYPES_H |
| 3 | |
| 4 | /* |
| 5 | * include/linux/spinlock_types.h - generic spinlock type definitions |
| 6 | * and initializers |
| 7 | * |
| 8 | * portions Copyright 2005, Red Hat, Inc., Ingo Molnar |
| 9 | * Released under the General Public License (GPL). |
| 10 | */ |
| 11 | |
| 12 | #if defined(CONFIG_SMP) |
| 13 | # include <asm/spinlock_types.h> |
| 14 | #else |
| 15 | # include <linux/spinlock_types_up.h> |
| 16 | #endif |
| 17 | |
Peter Zijlstra | 21f8ca3 | 2007-07-19 01:48:53 -0700 | [diff] [blame] | 18 | #include <linux/lockdep.h> |
| 19 | |
Thomas Gleixner | c2f21ce | 2009-12-02 20:02:59 +0100 | [diff] [blame] | 20 | typedef struct raw_spinlock { |
Thomas Gleixner | 445c895 | 2009-12-02 19:49:50 +0100 | [diff] [blame] | 21 | arch_spinlock_t raw_lock; |
Nick Piggin | 95c354f | 2008-01-30 13:31:20 +0100 | [diff] [blame] | 22 | #ifdef CONFIG_GENERIC_LOCKBREAK |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 23 | unsigned int break_lock; |
| 24 | #endif |
| 25 | #ifdef CONFIG_DEBUG_SPINLOCK |
| 26 | unsigned int magic, owner_cpu; |
| 27 | void *owner; |
| 28 | #endif |
Ingo Molnar | 8a25d5d | 2006-07-03 00:24:54 -0700 | [diff] [blame] | 29 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 30 | struct lockdep_map dep_map; |
| 31 | #endif |
Thomas Gleixner | c2f21ce | 2009-12-02 20:02:59 +0100 | [diff] [blame] | 32 | } raw_spinlock_t; |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 33 | |
| 34 | #define SPINLOCK_MAGIC 0xdead4ead |
| 35 | |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 36 | #define SPINLOCK_OWNER_INIT ((void *)-1L) |
| 37 | |
Ingo Molnar | 8a25d5d | 2006-07-03 00:24:54 -0700 | [diff] [blame] | 38 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 39 | # define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname } |
| 40 | #else |
| 41 | # define SPIN_DEP_MAP_INIT(lockname) |
| 42 | #endif |
| 43 | |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 44 | #ifdef CONFIG_DEBUG_SPINLOCK |
Thomas Gleixner | c2f21ce | 2009-12-02 20:02:59 +0100 | [diff] [blame] | 45 | # define SPIN_DEBUG_INIT(lockname) \ |
| 46 | .magic = SPINLOCK_MAGIC, \ |
| 47 | .owner_cpu = -1, \ |
| 48 | .owner = SPINLOCK_OWNER_INIT, |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 49 | #else |
Thomas Gleixner | c2f21ce | 2009-12-02 20:02:59 +0100 | [diff] [blame] | 50 | # define SPIN_DEBUG_INIT(lockname) |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 51 | #endif |
| 52 | |
Thomas Gleixner | c2f21ce | 2009-12-02 20:02:59 +0100 | [diff] [blame] | 53 | #define __RAW_SPIN_LOCK_INITIALIZER(lockname) \ |
| 54 | { \ |
| 55 | .raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \ |
| 56 | SPIN_DEBUG_INIT(lockname) \ |
| 57 | SPIN_DEP_MAP_INIT(lockname) } |
| 58 | |
| 59 | #define __RAW_SPIN_LOCK_UNLOCKED(lockname) \ |
| 60 | (raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname) |
| 61 | |
| 62 | #define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x) |
| 63 | |
| 64 | typedef struct spinlock { |
| 65 | union { |
| 66 | struct raw_spinlock rlock; |
| 67 | |
| 68 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 69 | # define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map)) |
| 70 | struct { |
| 71 | u8 __padding[LOCK_PADSIZE]; |
| 72 | struct lockdep_map dep_map; |
| 73 | }; |
| 74 | #endif |
| 75 | }; |
| 76 | } spinlock_t; |
| 77 | |
| 78 | #define __SPIN_LOCK_INITIALIZER(lockname) \ |
| 79 | { { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } } |
| 80 | |
| 81 | #define __SPIN_LOCK_UNLOCKED(lockname) \ |
| 82 | (spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname) |
| 83 | |
Ingo Molnar | e4d9191 | 2006-07-03 00:24:34 -0700 | [diff] [blame] | 84 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x) |
Thomas Gleixner | ef12f10 | 2009-11-07 23:04:15 +0100 | [diff] [blame] | 85 | |
| 86 | #include <linux/rwlock_types.h> |
Ingo Molnar | fb1c8f9 | 2005-09-10 00:25:56 -0700 | [diff] [blame] | 87 | |
| 88 | #endif /* __LINUX_SPINLOCK_TYPES_H */ |