[PATCH v4 1/3] riscv: word-at-a-time: improve find_zero() for !RISCV_ISA_ZBB or no Zbb

[Nam Cao]

Jisheng Zhang <jszhang at kernel.org> writes:
> What's more, the fls64() brings non-necessary zero bits couting for
> RV32. In fact, fls() is enough.

I think this is in here by mistake? There is no fls() in this patch.

Other than that, looks good:
Reviewed-by: Nam Cao <namcao at linutronix.de>