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-rw-r--r--arch/alpha/include/asm/futex.h22
1 files changed, 12 insertions, 10 deletions
diff --git a/arch/alpha/include/asm/futex.h b/arch/alpha/include/asm/futex.h
index 945de222ab91..c4e5c2850cce 100644
--- a/arch/alpha/include/asm/futex.h
+++ b/arch/alpha/include/asm/futex.h
@@ -81,21 +81,22 @@ static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
}
static inline int
-futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
+futex_atomic_cmpxchg_inatomic(int *uval, int __user *uaddr,
+ int oldval, int newval)
{
- int prev, cmp;
+ int ret = 0, prev, cmp;
if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
return -EFAULT;
__asm__ __volatile__ (
__ASM_SMP_MB
- "1: ldl_l %0,0(%2)\n"
- " cmpeq %0,%3,%1\n"
- " beq %1,3f\n"
- " mov %4,%1\n"
- "2: stl_c %1,0(%2)\n"
- " beq %1,4f\n"
+ "1: ldl_l %1,0(%3)\n"
+ " cmpeq %1,%4,%2\n"
+ " beq %2,3f\n"
+ " mov %5,%2\n"
+ "2: stl_c %2,0(%3)\n"
+ " beq %2,4f\n"
"3: .subsection 2\n"
"4: br 1b\n"
" .previous\n"
@@ -105,11 +106,12 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
" .long 2b-.\n"
" lda $31,3b-2b(%0)\n"
" .previous\n"
- : "=&r"(prev), "=&r"(cmp)
+ : "+r"(ret), "=&r"(prev), "=&r"(cmp)
: "r"(uaddr), "r"((long)oldval), "r"(newval)
: "memory");
- return prev;
+ *uval = prev;
+ return ret;
}
#endif /* __KERNEL__ */