> Alexander Viro writes:
> > BTW, here's one more devfs rmmod race: check_disk_changed() in
> > fs/devfs/base.c. Calling ->check_media_change() with no protection
> > whatsoever. If rmmod happens at that point...
>
> How is this different from a call to fs/block_dev.c:check_disk_change()
> which also has no protection?
It's called either from driver itself (and then whatever protects caller
protects it as well) or after we'd pinned the thing down by blkdev_get().
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