4 #define ARCH (arch_s390)
6 #ifndef __NR_ioprio_set
7 #define __NR_ioprio_set 282
8 #define __NR_ioprio_get 283
11 #ifndef __NR_fadvise64
12 #define __NR_fadvise64 253
15 #ifndef __NR_sys_splice
16 #define __NR_sys_splice 306
17 #define __NR_sys_tee 308
18 #define __NR_sys_vmsplice 309
21 #define nop asm volatile ("diag 0,0,68" : : : "memory")
22 #define read_barrier() asm volatile("bcr 15,0" : : : "memory")
23 #define write_barrier() asm volatile("bcr 15,0" : : : "memory")
26 volatile unsigned int lock;
30 _raw_compare_and_swap(volatile unsigned int *lock,
31 unsigned int old, unsigned int new)
35 : "=d" (old), "=m" (*lock)
36 : "0" (old), "d" (new), "a" (lock), "m" (*lock)
42 static inline void spin_lock(spinlock_t *lock)
44 if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
50 if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
55 static inline void spin_unlock(spinlock_t *lock)
57 _raw_compare_and_swap(&lock->lock, 0x80000000, 0);