Re: [PATCH] 2.5.17 /dev/ports

[Alan Cox]

> kmem = kernel memory.  That may not be the same as the physical
> memory (the fact that it is at present I find mostly irrelevant here).
> /dev/mem is the more correct device to use for this purpose.

/dev/mem is also not strictly correct. Linux in/out space is operated as
synchronous I/O operations. A dumb map of /dev/mem areas can lead to
differences if the platform concerned has to do the I/O post and wait
completion handling in software. (O_SYNC is also not enough since thats
memory caching not PCI posting)

Alan