lkml.org 
[lkml]   [1999]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Big Fix for 2.2.1
Note: CC list pruned because it was starting to read like a Whos Who of
Linux. :-)

On Wed, 27 Jan 1999, Linux Lists wrote:
> > and then change everybody who uses "readX/writeX" to legacy addresses to
> > do read_ISA_X/write_ISA_X and then have something like
[...]
> Please don't do that. The Cyclades driver supports both ISA and PCI cards,
> and it follows correctly the current definition, by ioremap'ing addresses
> above 1MB and using readX/writeX for _all_ accesses to MMIO resources (in
> ISA or PCI). Doing this change would mean having to test which card I'm
> accessing _every time_ I do a readX/writeX, which is completelly
> unacceptable (for obvious performance reasons).

Ivan-

Perhaps I'm naive, or missing something really obvious here, but...

Shouldn't you already know which bus-type of card you're accessing long
before you get to the performance-critical code in any driver?

-Andy

Global Auctions
http://www.globalauctions.com



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:50    [W:0.045 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site