On Thu, 7 May 2020 11:35:26 +0900, Damien Le Moal wrote:
> Allowing a non-power-of-2 zone size forces the use of direct division
> operations of 64bits sector values to obtain a zone number or number of
> zones. Doing so without using do_div() leads to compilation errors on
> 32bits architecture.
>
> Devices with a zone size that is not a power of 2 do not exist today so
> allowing their emulation is of limited interest, as the sd driver will
> not support them anyway. So to fix this compilation error, instead of
> using do_div() for sector values divisions, simply disallow zone size
> values that are not a power of 2 value, allowing to use bitshift for
> divisions in all cases.
Applied to 5.8/scsi-queue, thanks!
[1/1] scsi: scsi_debug: Disallow zone sizes that are not powers of 2
https://git.kernel.org/mkp/scsi/c/108e36f0d8bf
--
Martin K. Petersen Oracle Linux Engineering
