+static inline int __raw_read_trylock(raw_rwlock_t *rw)
+{
+ unsigned int tmp;
+ int ret;
+
+ if (R10000_LLSC_WAR) {
+ __asm__ __volatile__(
+ " .set noreorder # __raw_read_trylock \n"
+ " li %2, 0 \n"
+ "1: ll %1, %3 \n"
+ " bnez %1, 2f \n"
+ " addu %1, 1 \n"
+ " sc %1, %0 \n"
+ " .set reorder \n"
+ " beqzl %1, 1b \n"
+ " nop \n"
+ __WEAK_ORDERING_MB
+ " li %2, 1 \n"
+ "2: \n"
+ : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
+ : "m" (rw->lock)
+ : "memory");
+ } else {
+ __asm__ __volatile__(
+ " .set noreorder # __raw_read_trylock \n"
+ " li %2, 0 \n"
+ "1: ll %1, %3 \n"
+ " bnez %1, 2f \n"
+ " addu %1, 1 \n"
+ " sc %1, %0 \n"
+ " beqz %1, 1b \n"
+ " nop \n"
+ " .set reorder \n"
+ __WEAK_ORDERING_MB
+ " li %2, 1 \n"
+ "2: \n"
+ : "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
+ : "m" (rw->lock)
+ : "memory");
+ }
+
+ return ret;
+}