arch/csky/include/asm/spinlock_types.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 #ifndef __ASM_CSKY_SPINLOCK_TYPES_H
   4 #define __ASM_CSKY_SPINLOCK_TYPES_H
   5
   6 #ifndef __LINUX_SPINLOCK_TYPES_H
   7 # error "please don't include this file directly"
   8 #endif
   9
  10 #define TICKET_NEXT     16
  11
  12 typedef struct {
  13         union {
  14                 u32 lock;
  15                 struct __raw_tickets {
  16                         /* little endian */
  17                         u16 owner;
  18                         u16 next;
  19                 } tickets;
  20         };
  21 } arch_spinlock_t;
  22
  23 #define __ARCH_SPIN_LOCK_UNLOCKED       { { 0 } }
  24
  25 #ifdef CONFIG_QUEUED_RWLOCKS
  26 #include <asm-generic/qrwlock_types.h>
  27
  28 #else /* CONFIG_NR_CPUS > 2 */
  29
  30 typedef struct {
  31         u32 lock;
  32 } arch_rwlock_t;
  33
  34 #define __ARCH_RW_LOCK_UNLOCKED         { 0 }
  35
  36 #endif /* CONFIG_QUEUED_RWLOCKS */
  37 #endif /* __ASM_CSKY_SPINLOCK_TYPES_H */