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 27 typedef 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 39 typedef struct { 40 volatile unsigned int lock; 41 } arch_rwlock_t; 42 43 #define __ARCH_RW_LOCK_UNLOCKED { 0 } 44 45 #endif 46