make mips64 a_sc_p atomic primitive's asm constraints work with clang

apparently clang does not accept matching-register input and output
constraints that differ in size (32-bit vs 64-bit).

based on patch by Jaydeep Patil.

diff --git a/arch/mips64/atomic_arch.h b/arch/mips64/atomic_arch.h
index 49d9884..8664e11 100644 (file)
--- a/arch/mips64/atomic_arch.h
+++ b/arch/mips64/atomic_arch.h
@@ -31,7 +31,7 @@ static inline void *a_ll_p(volatile long *p)
 #define a_sc_p a_sc_p
 static inline int a_sc_p(volatile long *p, void *v)
 {
-       int r;
+       long r;
        __asm__ __volatile__ (
                "scd %0, %1"
                : "=r"(r), "=m"(*p) : "0"(v) : "memory");