Differential D24847 Diff 71810 sys/compat/linuxkpi/common/include/linux/mutex.h

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	#define _LINUX_MUTEX_H_			#define _LINUX_MUTEX_H_

	#include <sys/param.h>			#include <sys/param.h>
	#include <sys/proc.h>			#include <sys/proc.h>
	#include <sys/lock.h>			#include <sys/lock.h>
	#include <sys/sx.h>			#include <sys/sx.h>

	#include <linux/spinlock.h>			#include <linux/spinlock.h>
				#include <asm/atomic.h>

	typedef struct mutex {			typedef struct mutex {
	struct sx sx;			struct sx sx;
	} mutex_t;			} mutex_t;

	/*			/*
	* By defining CONFIG_NO_MUTEX_SKIP LinuxKPI mutexes and asserts will			* By defining CONFIG_NO_MUTEX_SKIP LinuxKPI mutexes and asserts will
	* not be skipped during panic().			* not be skipped during panic().
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	{			{
	return ((struct thread *)SX_OWNER(m->sx.sx_lock) != NULL);			return ((struct thread *)SX_OWNER(m->sx.sx_lock) != NULL);
	}			}

	static inline bool			static inline bool
	mutex_is_owned(mutex_t *m)			mutex_is_owned(mutex_t *m)
	{			{
	return (sx_xlocked(&m->sx));			return (sx_xlocked(&m->sx));
				}

				static inline int atomic_dec_and_mutex_lock(atomic_t cnt, struct mutex m)
				{
				if (atomic_dec_and_test(cnt)) {
				mutex_lock(m);
				return (1);
				}

				return (0);
	}			}

	#ifdef WITNESS_ALL			#ifdef WITNESS_ALL
	/* NOTE: the maximum WITNESS name is 64 chars */			/* NOTE: the maximum WITNESS name is 64 chars */
	#define __mutex_name(name, file, line) \			#define __mutex_name(name, file, line) \
	(((const char *){file ":" #line "-" name}) + \			(((const char *){file ":" #line "-" name}) + \
	(sizeof(file) > 16 ? sizeof(file) - 16 : 0))			(sizeof(file) > 16 ? sizeof(file) - 16 : 0))
	#else			#else
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