1/* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16#ifndef __ASM_SPINLOCK_TYPES_H 17#define __ASM_SPINLOCK_TYPES_H 18 19#if !defined(__LINUX_SPINLOCK_TYPES_H) && !defined(__ASM_SPINLOCK_H) 20# error "please don't include this file directly" 21#endif 22 23#include <linux/types.h> 24 25#define TICKET_SHIFT 16 26 27typedef struct { 28#ifdef __AARCH64EB__ 29 u16 next; 30 u16 owner; 31#else 32 u16 owner; 33 u16 next; 34#endif 35} __aligned(4) arch_spinlock_t; 36 37#define __ARCH_SPIN_LOCK_UNLOCKED { 0 , 0 } 38 39typedef struct { 40 volatile unsigned int lock; 41} arch_rwlock_t; 42 43#define __ARCH_RW_LOCK_UNLOCKED { 0 } 44 45#endif 46