> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Tuesday, September 21, 2021 11:42 PM > > - Delete the iommufd_ctx->lock. Use RCU to protect load, erase/alloc does > not need locking (order it properly too, it is in the wrong order), and > don't check for duplicate devices or dev_cookie duplication, that > is user error and is harmless to the kernel. > I'm confused here. yes it's user error, but we check so many user errors and then return -EINVAL, -EBUSY, etc. Why is this one special?
