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94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
#ifndef __LINUX_SPINLOCK_API_UP_H
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#define __LINUX_SPINLOCK_API_UP_H
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#ifndef __LINUX_SPINLOCK_H
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# error "please don't include this file directly"
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#endif
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/*
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* include/linux/spinlock_api_up.h
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*
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* spinlock API implementation on UP-nondebug (inlined implementation)
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*
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* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
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* Released under the General Public License (GPL).
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*/
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#define in_lock_functions(ADDR) 0
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#define assert_raw_spin_locked(lock) do { (void)(lock); } while (0)
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/*
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* In the UP-nondebug case there's no real locking going on, so the
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* only thing we have to do is to keep the preempt counts and irq
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* flags straight, to suppress compiler warnings of unused lock
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* variables, and to add the proper checker annotations:
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*/
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#define __LOCK(lock) \
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do { preempt_disable(); __acquire(lock); (void)(lock); } while (0)
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#define __LOCK_BH(lock) \
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do { local_bh_disable(); __LOCK(lock); } while (0)
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#define __LOCK_IRQ(lock) \
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do { asm volatile ("cli \n"); __LOCK(lock); } while (0)
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#define __LOCK_IRQSAVE(lock, flags) \
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do { \
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__asm__ __volatile__ ( \
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"pushf\n\t" \
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"popl %0\n\t" \
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"cli\n" \
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: "=r" (flags)); \
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__LOCK(lock); \
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} while (0) \
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#define __UNLOCK(lock) \
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do { preempt_enable(); __release(lock); (void)(lock); } while (0)
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#define __UNLOCK_BH(lock) \
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do { preempt_enable_no_resched(); local_bh_enable(); \
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__release(lock); (void)(lock); } while (0)
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#define __UNLOCK_IRQ(lock) \
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do { asm volatile ("sti \n"); __UNLOCK(lock); } while (0)
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#define __UNLOCK_IRQRESTORE(lock, flags) \
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do { \
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if (flags & (1<<9)) \
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__asm__ __volatile__ ("sti"); \
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__UNLOCK(lock); \
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} while (0)
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#define _spin_lock(lock) __LOCK(lock)
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#define _spin_lock_nested(lock, subclass) __LOCK(lock)
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#define _read_lock(lock) __LOCK(lock)
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#define _write_lock(lock) __LOCK(lock)
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#define _spin_lock_bh(lock) __LOCK_BH(lock)
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#define _read_lock_bh(lock) __LOCK_BH(lock)
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#define _write_lock_bh(lock) __LOCK_BH(lock)
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#define _spin_lock_irq(lock) __LOCK_IRQ(lock)
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#define _read_lock_irq(lock) __LOCK_IRQ(lock)
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#define _write_lock_irq(lock) __LOCK_IRQ(lock)
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#define _spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
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#define _read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
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#define _write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
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#define _spin_trylock(lock) ({ __LOCK(lock); 1; })
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#define _read_trylock(lock) ({ __LOCK(lock); 1; })
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#define _write_trylock(lock) ({ __LOCK(lock); 1; })
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#define _spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; })
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#define _spin_unlock(lock) __UNLOCK(lock)
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#define _read_unlock(lock) __UNLOCK(lock)
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#define _write_unlock(lock) __UNLOCK(lock)
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#define _spin_unlock_bh(lock) __UNLOCK_BH(lock)
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#define _write_unlock_bh(lock) __UNLOCK_BH(lock)
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#define _read_unlock_bh(lock) __UNLOCK_BH(lock)
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#define _spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
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#define _read_unlock_irq(lock) __UNLOCK_IRQ(lock)
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#define _write_unlock_irq(lock) __UNLOCK_IRQ(lock)
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#define _spin_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
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#define _read_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
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#define _write_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
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#endif /* __LINUX_SPINLOCK_API_UP_H */
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