X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=arch%2Farch-s390.h;h=8c6fa5ef2e5a92b0cbf391a8ca9a17efa663148a;hp=dfb7899ba7ce2d07ae365fdf91784e76f6b30359;hb=69ebbd397e80b23ec4281c99e9f7242a089cc771;hpb=44c47feb9edc7854bf3cfa2e3d843e90fc969b3a

diff --git a/arch/arch-s390.h b/arch/arch-s390.h
index dfb7899b..8c6fa5ef 100644
--- a/arch/arch-s390.h
+++ b/arch/arch-s390.h
@@ -12,8 +12,49 @@
 #define __NR_fadvise64		253
 #endif
 
+#ifndef __NR_sys_splice
+#define __NR_sys_splice		306
+#define __NR_sys_tee		308
+#define __NR_sys_vmsplice	309
+#endif
+
 #define nop		asm volatile ("diag 0,0,68" : : : "memory")
 #define read_barrier()	asm volatile("bcr 15,0" : : : "memory")
 #define write_barrier()	asm volatile("bcr 15,0" : : : "memory")
 
+typedef struct {
+	volatile unsigned int lock;
+} spinlock_t;
+
+static inline int
+_raw_compare_and_swap(volatile unsigned int *lock,
+		      unsigned int old, unsigned int new)
+{
+	__asm__ __volatile__(
+		"       cs      %0,%3,0(%4)"
+		: "=d" (old), "=m" (*lock)
+		: "0" (old), "d" (new), "a" (lock), "m" (*lock)
+		: "cc", "memory" );
+
+	return old;
+}
+
+static inline void spin_lock(spinlock_t *lock)
+{
+	if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
+		return;
+
+	while (1) {
+		if (lock->lock)
+			continue;
+		if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
+			break;
+	}
+}
+
+static inline void spin_unlock(spinlock_t *lock)
+{
+	 _raw_compare_and_swap(&lock->lock, 0x80000000, 0);
+}
+
 #endif