1 #ifndef __ASM_SH_FUTEX_LLSC_H 2 #define __ASM_SH_FUTEX_LLSC_H 3 4 static inline int atomic_futex_op_cmpxchg_inatomic(u32 *uval, 5 u32 __user *uaddr, 6 u32 oldval, u32 newval) 7 { 8 int err = 0; 9 __asm__ __volatile__( 10 "synco\n" 11 "1:\n\t" 12 "movli.l @%2, r0\n\t" 13 "mov r0, %1\n\t" 14 "cmp/eq %1, %4\n\t" 15 "bf 2f\n\t" 16 "mov %5, r0\n\t" 17 "movco.l r0, @%2\n\t" 18 "bf 1b\n" 19 "2:\n\t" 20 "synco\n\t" 21 #ifdef CONFIG_MMU 22 ".section .fixup,\"ax\"\n" 23 "3:\n\t" 24 "mov.l 4f, %0\n\t" 25 "jmp @%0\n\t" 26 " mov %3, %0\n\t" 27 ".balign 4\n" 28 "4: .long 2b\n\t" 29 ".previous\n" 30 ".section __ex_table,\"a\"\n\t" 31 ".long 1b, 3b\n\t" 32 ".previous" 33 #endif 34 :"+r" (err), "=&r" (*uval) 35 :"r" (uaddr), "i" (-EFAULT), "r" (oldval), "r" (newval) 36 :"t", "memory", "r0"); 37 if (err) return err; 38 return 0; 39 } 40 41 #endif /* __ASM_SH_FUTEX_LLSC_H */ 42