On 3/31/21 1:29 AM, Christoph Hellwig wrote: > Hi all, > > this series starts to clean up and remove the impact of the legacy old > block layer bounce buffering code. > > First it removes support for ISA bouncing. This was used by three SCSI > drivers. One of them actually had an active user and developer 5 years > ago so I've converted it to use a local bounce buffer - Ondrej, can you > test the coversion? The next one has been known broken for years, and > the third one looks like it has no users for the ISA support so they > are just dropped. > > It then removes support for dealing with bounce buffering highmem pages > for passthrough requests as we can just use the copy instead of the map > path for them. This will reduce efficiency for such setups on highmem > systems (e.g. usb-storage attached DVD drives), but then again that is > what you get for using a driver not using modern interfaces on a 32-bit > highmem system. It does allow to streamline the common path pretty nicely. Applied, thanks. -- Jens Axboe
