108e36f0d8
Allowing a non-power-of-2 zone size forces the use of direct division operations of 64-bit sector values to obtain a zone number or number of zones. Doing so without using do_div() leads to compilation errors on 32-bit architectures. 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. 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. [mkp: commit desc] Link: https://lore.kernel.org/r/20200507023526.221574-1-damien.lemoal@wdc.com Fixes: 98e0a689868c ("scsi: scsi_debug: Add zone_size_mb module parameter") Fixes: f0d1cf9378bd ("scsi: scsi_debug: Add ZBC zone commands") Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.