-#ifndef _ASM_FUTEX_H
-#define _ASM_FUTEX_H
+#ifndef _ASM_S390_FUTEX_H
+#define _ASM_S390_FUTEX_H
#ifdef __KERNEL__
#include <linux/futex.h>
+#include <linux/uaccess.h>
#include <asm/errno.h>
-#include <asm/uaccess.h>
-static inline int
-futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
+static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
{
int op = (encoded_op >> 28) & 7;
int cmp = (encoded_op >> 24) & 15;
int oparg = (encoded_op << 8) >> 20;
int cmparg = (encoded_op << 20) >> 20;
- int oldval = 0, ret;
+ int oldval, ret;
+
if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
oparg = 1 << oparg;
if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
- inc_preempt_count();
-
- switch (op) {
- case FUTEX_OP_SET:
- case FUTEX_OP_ADD:
- case FUTEX_OP_OR:
- case FUTEX_OP_ANDN:
- case FUTEX_OP_XOR:
- default:
- ret = -ENOSYS;
- }
-
- dec_preempt_count();
+ pagefault_disable();
+ ret = uaccess.futex_atomic_op(op, uaddr, oparg, &oldval);
+ pagefault_enable();
if (!ret) {
switch (cmp) {
return ret;
}
-#endif
-#endif
+static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr,
+ int oldval, int newval)
+{
+ if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
+ return -EFAULT;
+
+ return uaccess.futex_atomic_cmpxchg(uaddr, oldval, newval);
+}
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_S390_FUTEX_H */