} else if (kernel_uses_llsc) {
unsigned long dummy;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %3 # xchg_u32 \n"
- " .set mips0 \n"
- " move %2, %z4 \n"
- " .set mips3 \n"
- " sc %2, %1 \n"
- " beqz %2, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " ll %0, %3 # xchg_u32 \n"
+ " .set mips0 \n"
+ " move %2, %z4 \n"
+ " .set mips3 \n"
+ " sc %2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (retval), "=m" (*m), "=&r" (dummy)
+ : "R" (*m), "Jr" (val)
+ : "memory");
+ } while (unlikely(!dummy));
} else {
unsigned long flags;
} else if (kernel_uses_llsc) {
unsigned long dummy;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %0, %3 # xchg_u64 \n"
- " move %2, %z4 \n"
- " scd %2, %1 \n"
- " beqz %2, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " lld %0, %3 # xchg_u64 \n"
+ " move %2, %z4 \n"
+ " scd %2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (retval), "=m" (*m), "=&r" (dummy)
+ : "R" (*m), "Jr" (val)
+ : "memory");
+ } while (unlikely(!dummy));
} else {
unsigned long flags;