/*
* Must define these before including other files, inline functions need them
*/
-#define LOCK_SECTION_NAME \
- ".text.lock." __stringify(KBUILD_BASENAME)
+#define LOCK_SECTION_NAME \
+ ".text.lock." __stringify(KBUILD_BASENAME)
-#define LOCK_SECTION_START(extra) \
- ".subsection 1\n\t" \
- extra \
- ".ifndef " LOCK_SECTION_NAME "\n\t" \
- LOCK_SECTION_NAME ":\n\t" \
- ".endif\n\t"
+#define LOCK_SECTION_START(extra) \
+ ".subsection 1\n\t" \
+ extra \
+ ".ifndef " LOCK_SECTION_NAME "\n\t" \
+ LOCK_SECTION_NAME ":\n\t" \
+ ".endif\n"
-#define LOCK_SECTION_END \
- ".previous\n\t"
+#define LOCK_SECTION_END \
+ ".previous\n\t"
+
+#define __lockfunc fastcall __attribute__((section(".spinlock.text")))
/*
* If CONFIG_SMP is set, pull in the _raw_* definitions
*/
#ifdef CONFIG_SMP
+
+#define assert_spin_locked(x) BUG_ON(!spin_is_locked(x))
#include <asm/spinlock.h>
+int __lockfunc _spin_trylock(spinlock_t *lock);
+int __lockfunc _read_trylock(rwlock_t *lock);
+int __lockfunc _write_trylock(rwlock_t *lock);
+
+void __lockfunc _spin_lock(spinlock_t *lock) __acquires(spinlock_t);
+void __lockfunc _read_lock(rwlock_t *lock) __acquires(rwlock_t);
+void __lockfunc _write_lock(rwlock_t *lock) __acquires(rwlock_t);
+
+void __lockfunc _spin_unlock(spinlock_t *lock) __releases(spinlock_t);
+void __lockfunc _read_unlock(rwlock_t *lock) __releases(rwlock_t);
+void __lockfunc _write_unlock(rwlock_t *lock) __releases(rwlock_t);
+
+unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) __acquires(spinlock_t);
+unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) __acquires(rwlock_t);
+unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) __acquires(rwlock_t);
+
+void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(spinlock_t);
+void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(spinlock_t);
+void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
+void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
+void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(rwlock_t);
+void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(rwlock_t);
+
+void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) __releases(spinlock_t);
+void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(spinlock_t);
+void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(spinlock_t);
+void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) __releases(rwlock_t);
+void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
+void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
+void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) __releases(rwlock_t);
+void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(rwlock_t);
+void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(rwlock_t);
+
+int __lockfunc _spin_trylock_bh(spinlock_t *lock);
+int __lockfunc generic_raw_read_trylock(rwlock_t *lock);
+int in_lock_functions(unsigned long addr);
+
#else
+#define in_lock_functions(ADDR) 0
+
#if !defined(CONFIG_PREEMPT) && !defined(CONFIG_DEBUG_SPINLOCK)
-# define atomic_dec_and_lock(atomic,lock) atomic_dec_and_test(atomic)
+# define _atomic_dec_and_lock(atomic,lock) atomic_dec_and_test(atomic)
# define ATOMIC_DEC_AND_LOCK
#endif
0; \
})
+/* with debugging, assert_spin_locked() on UP does check
+ * the lock value properly */
+#define assert_spin_locked(x) \
+ ({ \
+ CHECK_LOCK(x); \
+ BUG_ON(!(x)->lock); \
+ })
+
/* without debugging, spin_trylock on UP always says
* TRUE. --> printk if already locked. */
#define _raw_spin_trylock(x) \
#define spin_lock_init(lock) do { (void)(lock); } while(0)
#define _raw_spin_lock(lock) do { (void)(lock); } while(0)
#define spin_is_locked(lock) ((void)(lock), 0)
-#define _raw_spin_trylock(lock) ((void)(lock), 1)
-#define spin_unlock_wait(lock) do { (void)(lock); } while(0)
-#define _raw_spin_unlock(lock) do { (void)(lock); } while(0)
+#define assert_spin_locked(lock) do { (void)(lock); } while(0)
+#define _raw_spin_trylock(lock) (((void)(lock), 1))
+#define spin_unlock_wait(lock) (void)(lock)
+#define _raw_spin_unlock(lock) do { (void)(lock); } while(0)
#endif /* CONFIG_DEBUG_SPINLOCK */
/* RW spinlocks: No debug version */
#define _raw_read_unlock(lock) do { (void)(lock); } while(0)
#define _raw_write_lock(lock) do { (void)(lock); } while(0)
#define _raw_write_unlock(lock) do { (void)(lock); } while(0)
+#define read_can_lock(lock) (((void)(lock), 1))
+#define write_can_lock(lock) (((void)(lock), 1))
+#define _raw_read_trylock(lock) ({ (void)(lock); (1); })
#define _raw_write_trylock(lock) ({ (void)(lock); (1); })
-#endif /* !SMP */
-
-/*
- * Define the various spin_lock and rw_lock methods. Note we define these
- * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
- * methods are defined as nops in the case they are not required.
- */
-#define spin_trylock(lock) ({preempt_disable(); _raw_spin_trylock(lock) ? \
+#define _spin_trylock(lock) ({preempt_disable(); _raw_spin_trylock(lock) ? \
1 : ({preempt_enable(); 0;});})
-#define write_trylock(lock) ({preempt_disable();_raw_write_trylock(lock) ? \
+#define _read_trylock(lock) ({preempt_disable();_raw_read_trylock(lock) ? \
1 : ({preempt_enable(); 0;});})
-/* Where's read_trylock? */
-
-#if defined(CONFIG_SMP) && defined(CONFIG_PREEMPT)
-void __preempt_spin_lock(spinlock_t *lock);
-void __preempt_write_lock(rwlock_t *lock);
-
-#define spin_lock(lock) \
-do { \
- preempt_disable(); \
- if (unlikely(!_raw_spin_trylock(lock))) \
- __preempt_spin_lock(lock); \
-} while (0)
+#define _write_trylock(lock) ({preempt_disable(); _raw_write_trylock(lock) ? \
+ 1 : ({preempt_enable(); 0;});})
-#define write_lock(lock) \
-do { \
- preempt_disable(); \
- if (unlikely(!_raw_write_trylock(lock))) \
- __preempt_write_lock(lock); \
-} while (0)
+#define _spin_trylock_bh(lock) ({preempt_disable(); local_bh_disable(); \
+ _raw_spin_trylock(lock) ? \
+ 1 : ({preempt_enable_no_resched(); local_bh_enable(); 0;});})
-#else
-#define spin_lock(lock) \
+#define _spin_lock(lock) \
do { \
preempt_disable(); \
_raw_spin_lock(lock); \
+ __acquire(lock); \
} while(0)
-#define write_lock(lock) \
+#define _write_lock(lock) \
do { \
preempt_disable(); \
_raw_write_lock(lock); \
+ __acquire(lock); \
} while(0)
-#endif
-
-#define read_lock(lock) \
+
+#define _read_lock(lock) \
do { \
preempt_disable(); \
_raw_read_lock(lock); \
+ __acquire(lock); \
} while(0)
-#define spin_unlock(lock) \
+#define _spin_unlock(lock) \
do { \
_raw_spin_unlock(lock); \
preempt_enable(); \
+ __release(lock); \
} while (0)
-#define write_unlock(lock) \
+#define _write_unlock(lock) \
do { \
_raw_write_unlock(lock); \
preempt_enable(); \
+ __release(lock); \
} while(0)
-#define read_unlock(lock) \
+#define _read_unlock(lock) \
do { \
_raw_read_unlock(lock); \
preempt_enable(); \
+ __release(lock); \
} while(0)
-#define spin_lock_irqsave(lock, flags) \
-do { \
+#define _spin_lock_irqsave(lock, flags) \
+do { \
local_irq_save(flags); \
preempt_disable(); \
_raw_spin_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define spin_lock_irq(lock) \
+#define _spin_lock_irq(lock) \
do { \
local_irq_disable(); \
preempt_disable(); \
_raw_spin_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define spin_lock_bh(lock) \
+#define _spin_lock_bh(lock) \
do { \
local_bh_disable(); \
preempt_disable(); \
_raw_spin_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define read_lock_irqsave(lock, flags) \
-do { \
+#define _read_lock_irqsave(lock, flags) \
+do { \
local_irq_save(flags); \
preempt_disable(); \
_raw_read_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define read_lock_irq(lock) \
+#define _read_lock_irq(lock) \
do { \
local_irq_disable(); \
preempt_disable(); \
_raw_read_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define read_lock_bh(lock) \
+#define _read_lock_bh(lock) \
do { \
local_bh_disable(); \
preempt_disable(); \
_raw_read_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define write_lock_irqsave(lock, flags) \
-do { \
+#define _write_lock_irqsave(lock, flags) \
+do { \
local_irq_save(flags); \
preempt_disable(); \
_raw_write_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define write_lock_irq(lock) \
+#define _write_lock_irq(lock) \
do { \
local_irq_disable(); \
preempt_disable(); \
_raw_write_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define write_lock_bh(lock) \
+#define _write_lock_bh(lock) \
do { \
local_bh_disable(); \
preempt_disable(); \
_raw_write_lock(lock); \
+ __acquire(lock); \
} while (0)
-#define spin_unlock_irqrestore(lock, flags) \
+#define _spin_unlock_irqrestore(lock, flags) \
do { \
_raw_spin_unlock(lock); \
local_irq_restore(flags); \
preempt_enable(); \
+ __release(lock); \
} while (0)
-#define _raw_spin_unlock_irqrestore(lock, flags) \
-do { \
- _raw_spin_unlock(lock); \
- local_irq_restore(flags); \
-} while (0)
-
-#define spin_unlock_irq(lock) \
+#define _spin_unlock_irq(lock) \
do { \
_raw_spin_unlock(lock); \
local_irq_enable(); \
preempt_enable(); \
+ __release(lock); \
} while (0)
-#define spin_unlock_bh(lock) \
+#define _spin_unlock_bh(lock) \
do { \
_raw_spin_unlock(lock); \
- preempt_enable(); \
+ preempt_enable_no_resched(); \
local_bh_enable(); \
+ __release(lock); \
} while (0)
-#define read_unlock_irqrestore(lock, flags) \
+#define _write_unlock_bh(lock) \
do { \
- _raw_read_unlock(lock); \
- local_irq_restore(flags); \
- preempt_enable(); \
+ _raw_write_unlock(lock); \
+ preempt_enable_no_resched(); \
+ local_bh_enable(); \
+ __release(lock); \
} while (0)
-#define read_unlock_irq(lock) \
+#define _read_unlock_irqrestore(lock, flags) \
do { \
_raw_read_unlock(lock); \
- local_irq_enable(); \
+ local_irq_restore(flags); \
preempt_enable(); \
+ __release(lock); \
} while (0)
-#define read_unlock_bh(lock) \
+#define _write_unlock_irqrestore(lock, flags) \
do { \
- _raw_read_unlock(lock); \
+ _raw_write_unlock(lock); \
+ local_irq_restore(flags); \
preempt_enable(); \
- local_bh_enable(); \
+ __release(lock); \
} while (0)
-#define write_unlock_irqrestore(lock, flags) \
+#define _read_unlock_irq(lock) \
do { \
- _raw_write_unlock(lock); \
- local_irq_restore(flags); \
- preempt_enable(); \
+ _raw_read_unlock(lock); \
+ local_irq_enable(); \
+ preempt_enable(); \
+ __release(lock); \
} while (0)
-#define write_unlock_irq(lock) \
+#define _read_unlock_bh(lock) \
do { \
- _raw_write_unlock(lock); \
- local_irq_enable(); \
- preempt_enable(); \
+ _raw_read_unlock(lock); \
+ preempt_enable_no_resched(); \
+ local_bh_enable(); \
+ __release(lock); \
} while (0)
-#define write_unlock_bh(lock) \
+#define _write_unlock_irq(lock) \
do { \
- _raw_write_unlock(lock); \
- preempt_enable(); \
- local_bh_enable(); \
+ _raw_write_unlock(lock); \
+ local_irq_enable(); \
+ preempt_enable(); \
+ __release(lock); \
} while (0)
-#define spin_trylock_bh(lock) ({ local_bh_disable(); preempt_disable(); \
- _raw_spin_trylock(lock) ? 1 : \
- ({preempt_enable(); local_bh_enable(); 0;});})
+#endif /* !SMP */
+
+/*
+ * Define the various spin_lock and rw_lock methods. Note we define these
+ * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
+ * methods are defined as nops in the case they are not required.
+ */
+#define spin_trylock(lock) __cond_lock(_spin_trylock(lock))
+#define read_trylock(lock) __cond_lock(_read_trylock(lock))
+#define write_trylock(lock) __cond_lock(_write_trylock(lock))
+
+#define spin_lock(lock) _spin_lock(lock)
+#define write_lock(lock) _write_lock(lock)
+#define read_lock(lock) _read_lock(lock)
+
+#ifdef CONFIG_SMP
+#define spin_lock_irqsave(lock, flags) flags = _spin_lock_irqsave(lock)
+#define read_lock_irqsave(lock, flags) flags = _read_lock_irqsave(lock)
+#define write_lock_irqsave(lock, flags) flags = _write_lock_irqsave(lock)
+#else
+#define spin_lock_irqsave(lock, flags) _spin_lock_irqsave(lock, flags)
+#define read_lock_irqsave(lock, flags) _read_lock_irqsave(lock, flags)
+#define write_lock_irqsave(lock, flags) _write_lock_irqsave(lock, flags)
+#endif
+
+#define spin_lock_irq(lock) _spin_lock_irq(lock)
+#define spin_lock_bh(lock) _spin_lock_bh(lock)
+
+#define read_lock_irq(lock) _read_lock_irq(lock)
+#define read_lock_bh(lock) _read_lock_bh(lock)
+
+#define write_lock_irq(lock) _write_lock_irq(lock)
+#define write_lock_bh(lock) _write_lock_bh(lock)
+
+#define spin_unlock(lock) _spin_unlock(lock)
+#define write_unlock(lock) _write_unlock(lock)
+#define read_unlock(lock) _read_unlock(lock)
+
+#define spin_unlock_irqrestore(lock, flags) _spin_unlock_irqrestore(lock, flags)
+#define spin_unlock_irq(lock) _spin_unlock_irq(lock)
+#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
+
+#define read_unlock_irqrestore(lock, flags) _read_unlock_irqrestore(lock, flags)
+#define read_unlock_irq(lock) _read_unlock_irq(lock)
+#define read_unlock_bh(lock) _read_unlock_bh(lock)
+
+#define write_unlock_irqrestore(lock, flags) _write_unlock_irqrestore(lock, flags)
+#define write_unlock_irq(lock) _write_unlock_irq(lock)
+#define write_unlock_bh(lock) _write_unlock_bh(lock)
+
+#define spin_trylock_bh(lock) __cond_lock(_spin_trylock_bh(lock))
+
+#define spin_trylock_irq(lock) \
+({ \
+ local_irq_disable(); \
+ _spin_trylock(lock) ? \
+ 1 : ({local_irq_enable(); 0; }); \
+})
+
+#define spin_trylock_irqsave(lock, flags) \
+({ \
+ local_irq_save(flags); \
+ _spin_trylock(lock) ? \
+ 1 : ({local_irq_restore(flags); 0;}); \
+})
+
+#ifdef CONFIG_LOCKMETER
+extern void _metered_spin_lock (spinlock_t *lock);
+extern void _metered_spin_unlock (spinlock_t *lock);
+extern int _metered_spin_trylock(spinlock_t *lock);
+extern void _metered_read_lock (rwlock_t *lock);
+extern void _metered_read_unlock (rwlock_t *lock);
+extern void _metered_write_lock (rwlock_t *lock);
+extern void _metered_write_unlock (rwlock_t *lock);
+extern int _metered_read_trylock (rwlock_t *lock);
+extern int _metered_write_trylock(rwlock_t *lock);
+#endif
/* "lock on reference count zero" */
#ifndef ATOMIC_DEC_AND_LOCK
#include <asm/atomic.h>
-extern int atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
+extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
#endif
+#define atomic_dec_and_lock(atomic,lock) __cond_lock(_atomic_dec_and_lock(atomic,lock))
+
/*
* bit-based spin_lock()
*
preempt_disable();
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
while (test_and_set_bit(bitnum, addr)) {
- while (test_bit(bitnum, addr))
+ while (test_bit(bitnum, addr)) {
+ preempt_enable();
cpu_relax();
+ preempt_disable();
+ }
}
#endif
+ __acquire(bitlock);
}
/*
*/
static inline int bit_spin_trylock(int bitnum, unsigned long *addr)
{
+ preempt_disable();
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
- int ret;
-
- preempt_disable();
- ret = !test_and_set_bit(bitnum, addr);
- if (!ret)
+ if (test_and_set_bit(bitnum, addr)) {
preempt_enable();
- return ret;
-#else
- preempt_disable();
- return 1;
+ return 0;
+ }
#endif
+ __acquire(bitlock);
+ return 1;
}
/*
clear_bit(bitnum, addr);
#endif
preempt_enable();
+ __release(bitlock);
}
/*
#endif
}
+#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
+#define DEFINE_RWLOCK(x) rwlock_t x = RW_LOCK_UNLOCKED
+
+/**
+ * spin_can_lock - would spin_trylock() succeed?
+ * @lock: the spinlock in question.
+ */
+#define spin_can_lock(lock) (!spin_is_locked(lock))
+
#endif /* __LINUX_SPINLOCK_H */
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