1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_FUTEX_H
3 #define __ASM_SH_FUTEX_H
5 #include <linux/futex.h>
6 #include <linux/uaccess.h>
9 #if !defined(CONFIG_SMP)
10 #include <asm/futex-irq.h>
11 #elif defined(CONFIG_CPU_J2)
12 #include <asm/futex-cas.h>
13 #elif defined(CONFIG_CPU_SH4A)
14 #include <asm/futex-llsc.h>
16 #error SMP not supported on this configuration.
20 futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
21 u32 oldval, u32 newval)
23 if (!access_ok(uaddr, sizeof(u32)))
26 return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval);
29 static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval,
32 u32 oldval, newval, prev;
36 ret = get_user(oldval, uaddr);
45 newval = oldval + oparg;
48 newval = oldval | oparg;
51 newval = oldval & ~oparg;
54 newval = oldval ^ oparg;
63 ret = futex_atomic_cmpxchg_inatomic(&prev, uaddr, oldval, newval);
64 } while (!ret && prev != oldval);
72 #endif /* __ASM_SH_FUTEX_H */