> +#define FAST_COPY_SAFEGUARD_SIZE (sizeof(long) * 2 - 1) > + > +#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS > + > +/* > + * The caller must ensure that the output buffer has enough space (len + FAST_COPY_SAFEGUARD_SIZE), > + * so we can write 2 words per loop without overflowing the output buffer > + */ > +static __always_inline u8 *copy_from_back_fast(u8 *out, size_t dist, size_t len) The code is pretty unreadable with these longs lines. Please stick to the normal 80 char limit.