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 * @param sl Pointer to spinlock_t structure.
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 * @param sl Pointer to spinlock_t structure.
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 */
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 */
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void spinlock_lock(spinlock_t *sl)
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void spinlock_lock(spinlock_t *sl)
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{
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{
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    count_t i = 0;
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    count_t i = 0;
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    __address caller = ((__address *) &sl)[-1];
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    __address caller = CALLER(sl);
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    char *symbol;
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    char *symbol;
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    bool deadlock_reported = false;
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    bool deadlock_reported = false;
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    preemption_disable();
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    preemption_disable();
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    while (test_and_set(&sl->val)) {
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    while (test_and_set(&sl->val)) {