spinlock_types.h

Go to the documentation of this file.

#ifndef _ASM_X86_SPINLOCK_TYPES_H
#define _ASM_X86_SPINLOCK_TYPES_H

#ifndef __LINUX_SPINLOCK_TYPES_H
# error "please don't include this file directly"
#endif

#include <linux/types.h>

#if (CONFIG_NR_CPUS < 256)
typedef u8  __ticket_t;
typedef u16 __ticketpair_t;
#else
typedef u16 __ticket_t;
typedef u32 __ticketpair_t;
#endif

#define TICKET_SHIFT    (sizeof(__ticket_t) * 8)

typedef struct arch_spinlock {
    union {
        __ticketpair_t head_tail;
        struct __raw_tickets {
            __ticket_t head, tail;
        } tickets;
    };
} arch_spinlock_t;

#define __ARCH_SPIN_LOCK_UNLOCKED   { { 0 } }

#include <asm/rwlock.h>

#endif /* _ASM_X86_SPINLOCK_TYPES_H */