scripts/atomic/fallbacks/dec_unless_positive

cat <<EOF
static __always_inline bool
arch_${atomic}_dec_unless_positive(${atomic}_t *v)
{
	${int} c = arch_${atomic}_read(v);

	do {
		if (unlikely(c > 0))
			return false;
	} while (!arch_${atomic}_try_cmpxchg(v, &c, c - 1));

	return true;
}
EOF