On Sat, Oct 29, 2022 at 08:00:58PM -0700, Bart Van Assche wrote:
> On 10/29/22 19:17, Dawei Li wrote:
> > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
> > index 57ed49f20d2e..7b537afe8b38 100644
> > --- a/include/linux/blkdev.h
> > +++ b/include/linux/blkdev.h
> > @@ -1349,12 +1349,7 @@ static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
> > /* assumes size > 256 */
> > static inline unsigned int blksize_bits(unsigned int size)
> > {
> > - unsigned int bits = 8;
> > - do {
> > - bits++;
> > - size >>= 1;
> > - } while (size > 256);
> > - return bits;
> > + return order_base_2((size + SECTOR_SIZE - 1) >> SECTOR_SHIFT) + SECTOR_SHIFT;
> > }
>
> Why the rounding ("+ SECTOR_SIZE - 1")? The blksize_bits() argument should
> be an argument of two.
Yeah, that's what's supposed to be.
But I thought maybe a "just in case" is more robust?
Should we consider these corner cases(!is_power_of_2())?
Thanks.
>
> Thanks,
>
> Bart.
>
