/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_SPINLOCK_TYPES_H
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#define __ASM_SPINLOCK_TYPES_H
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typedef struct {
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volatile unsigned int lock[4];
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# define __ARCH_SPIN_LOCK_UNLOCKED { { 1, 1, 1, 1 } }
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} arch_spinlock_t;
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/* counter:
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* Unlocked : 0x0100_0000
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* Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it)
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* Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000
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*/
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typedef struct {
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arch_spinlock_t lock_mutex;
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volatile unsigned int counter;
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} arch_rwlock_t;
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#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000
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#define __ARCH_RW_LOCK_UNLOCKED { .lock_mutex = __ARCH_SPIN_LOCK_UNLOCKED, \
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.counter = __ARCH_RW_LOCK_UNLOCKED__ }
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#endif
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