Path: utzoo!attcan!uunet!cs.utexas.edu!rice!sun-spots-request
From: uemura@waikiki.isl.melco.co.jp (Joe Uemura)
Newsgroups: comp.sys.sun
Subject: PAGEIO: how to do I/O to bp->b_pages
Keywords: Miscellaneous
Message-ID: <9417@brazos.Rice.edu>
Date: 28 Jun 90 21:04:59 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 12
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 241, message 7

I am writing a block device driver under SunOs4.1 and need to figure out
how to do I/O to pages on bp->b_pages when B_PAGEIO is set. Unfortunetely
I have no access to kernel source :-( so i would appreciate if anyone
could let me know how to convert a pp to a kernel virtual address.  I have
noticed that page_pptonum(pp) will give me a pfn back but don't know how
to get a kernel virtual address from a pfn (a la SVR4 pfntokv).

Any pointers to documentation, available kernel functions, sample source
(a generic strategy :-)),  will be appreciated.

Thanks in advance,
Joe Uemura