| #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 */ |