1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_FUTEX_H
3 #define __ASM_SH_FUTEX_H
7 #include <linux/futex.h>
8 #include <linux/uaccess.h>
11 #if !defined(CONFIG_SMP)
12 #include <asm/futex-irq.h>
13 #elif defined(CONFIG_CPU_J2)
14 #include <asm/futex-cas.h>
15 #elif defined(CONFIG_CPU_SH4A)
16 #include <asm/futex-llsc.h>
18 #error SMP not supported on this configuration.
22 futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
23 u32 oldval, u32 newval)
25 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32)))
28 return atomic_futex_op_cmpxchg_inatomic(uval, uaddr, oldval, newval);
31 static inline int arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval,
34 u32 oldval, newval, prev;
40 if (op == FUTEX_OP_SET)
43 ret = get_user(oldval, uaddr);
52 newval = oldval + oparg;
55 newval = oldval | oparg;
58 newval = oldval & ~oparg;
61 newval = oldval ^ oparg;
70 ret = futex_atomic_cmpxchg_inatomic(&prev, uaddr, oldval, newval);
71 } while (!ret && prev != oldval);
81 #endif /* __KERNEL__ */
82 #endif /* __ASM_SH_FUTEX_H */