[PATCH 02/10] block: move discard checks into the ioctl handler

[Christoph Hellwig]

On Fri, Mar 08, 2024 at 08:33:08AM +1100, Dave Chinner wrote:
> >  static int blk_ioctl_discard(struct block_device *bdev, blk_mode_t mode,
> >  		unsigned long arg)
> >  {
> > +	sector_t bs_mask = (bdev_logical_block_size(bdev) >> SECTOR_SHIFT) - 1;
> > +	sector_t sector, nr_sects;
> 
> This changes the alignment checks from a hard coded 512 byte sector
> to the logical block size of the device. I don't see a problem with
> this (it fixes a bug) but it should at least be mentioned in the
> commit message.

Before the exact block size alignment check as done down in
__blkdev_issue_discard, it just moves up here now.  I guess I need to
make that more clear in the commit message.