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- #ifndef __ASM_SH_FUTEX_CAS_H
- #define __ASM_SH_FUTEX_CAS_H
- static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval,
- u32 __user *uaddr,
- u32 oldval, u32 newval)
- {
- int err = 0;
- __asm__ __volatile__(
- "1:\n\t"
- "cas.l %2, %1, @r0\n"
- "2:\n\t"
- #ifdef CONFIG_MMU
- ".section .fixup,\"ax\"\n"
- "3:\n\t"
- "mov.l 4f, %0\n\t"
- "jmp @%0\n\t"
- " mov %3, %0\n\t"
- ".balign 4\n"
- "4: .long 2b\n\t"
- ".previous\n"
- ".section __ex_table,\"a\"\n\t"
- ".long 1b, 3b\n\t"
- ".previous"
- #endif
- :"+r" (err), "+r" (newval)
- :"r" (oldval), "i" (-EFAULT), "z" (uaddr)
- :"t", "memory");
- if (err) return err;
- *uval = newval;
- return 0;
- }
- #endif /* __ASM_SH_FUTEX_CAS_H */
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