From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Chubb Date: Tue, 28 Aug 2007 23:01:57 +0000 Subject: Re: wmb vs mmiowb Message-Id: <87ps17jmai.wl%peterc@chubb.wattle.id.au> List-Id: References: <20070822045714.GD26374@wotan.suse.de> <1187854035.5972.4.camel@localhost.localdomain> <200708230956.17049.jesse.barnes@intel.com> <20070828155714.Q5403@pkunk.americas.sgi.com> In-Reply-To: <20070828155714.Q5403@pkunk.americas.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Brent Casavant Cc: Nick Piggin , linux-ia64@vger.kernel.org, linuxppc-dev@ozlabs.org, Jesse Barnes , Linus Torvalds >>>>> "Brent" = Brent Casavant writes: Brent> That reminds me. Are the people who are working on the Brent> user-level driver effort including a capability similar to Brent> mmiowb()? If we had that capability we could eventually do Brent> away with the change mentioned above. But that would come Brent> after all user-level drivers were coded to include the Brent> mmiowb()-like calls, and existing drivers which provide mmap() Brent> capability directly to hardware go away. Not at present, because the platforms *I'm* mostly targetting at the moment don't need it. -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia