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Edit File: rwbase_rt.h

// SPDX-License-Identifier: GPL-2.0-only #ifndef _LINUX_RWBASE_RT_H #define _LINUX_RWBASE_RT_H #include <linux/rtmutex.h> #include <linux/atomic.h> #define READER_BIAS (1U << 31) #define WRITER_BIAS (1U << 30) struct rwbase_rt { atomic_t readers; struct rt_mutex_base rtmutex; }; #define __RWBASE_INITIALIZER(name) \ { \ .readers = ATOMIC_INIT(READER_BIAS), \ .rtmutex = __RT_MUTEX_BASE_INITIALIZER(name.rtmutex), \ } #define init_rwbase_rt(rwbase) \ do { \ rt_mutex_base_init(&(rwbase)->rtmutex); \ atomic_set(&(rwbase)->readers, READER_BIAS); \ } while (0) static __always_inline bool rw_base_is_locked(struct rwbase_rt *rwb) { return atomic_read(&rwb->readers) != READER_BIAS; } static __always_inline bool rw_base_is_contended(struct rwbase_rt *rwb) { return atomic_read(&rwb->readers) > 0; } #endif /* _LINUX_RWBASE_RT_H */