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    char *name;
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    char *name;
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#endif
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#endif
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    int val;
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    int val;
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};
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};
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/*
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 * SPINLOCK_DECLARE is to be used for dynamically allocated spinlocks,
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 * where the lock gets initialized in run time.
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 */
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#define SPINLOCK_DECLARE(slname)    spinlock_t slname
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/*
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 * SPINLOCK_INITIALIZE is to be used for statically allocated spinlocks.
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 * It declares and initializes the lock.
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 */
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#ifdef CONFIG_DEBUG_SPINLOCK
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#define SPINLOCK_INITIALIZE(slname)     \
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    spinlock_t slname = {       \
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        .name = #slname,    \
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        .val = 0        \
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    }
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#else
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#define SPINLOCK_INITIALIZE(slname)     \
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    spinlock_t slname = {       \
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        .val = 0        \
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    }
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#endif
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extern void spinlock_initialize(spinlock_t *sl, char *name);
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extern void spinlock_initialize(spinlock_t *sl, char *name);
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extern void spinlock_lock(spinlock_t *sl);
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extern void spinlock_lock(spinlock_t *sl);
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extern int spinlock_trylock(spinlock_t *sl);
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extern int spinlock_trylock(spinlock_t *sl);
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extern void spinlock_unlock(spinlock_t *sl);
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extern void spinlock_unlock(spinlock_t *sl);
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#else
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#else
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/* On UP systems, spinlocks are effectively left out. */
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struct spinlock {
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#define SPINLOCK_DECLARE(name)
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};
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#define SPINLOCK_INITIALIZE(name)
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#define spinlock_initialize(x,name)
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#define spinlock_initialize(x,name)
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#define spinlock_lock(x)        preemption_disable()
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#define spinlock_lock(x)        preemption_disable()
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#define spinlock_trylock(x)         (preemption_disable(), 1)
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#define spinlock_trylock(x)         (preemption_disable(), 1)
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#define spinlock_unlock(x)      preemption_enable()
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#define spinlock_unlock(x)      preemption_enable()