On 16 Jul 10 08:58, Russell King - ARM Linux wrote: > On Thu, Jul 15, 2010 at 08:48:36PM -0400, Tim HRM wrote: > > Interesting, since I seem to remember the MSM devices mostly conduct > > IO through regions of normal RAM, largely accomplished through > > ioremap() calls. > > > > Without more public domain documentation of the MSM chips and AMSS > > interfaces I wouldn't know how to avoid this, but I can imagine it > > creates a bit of urgency for Qualcomm developers as they attempt to > > upstream support for this most interesting SoC. > > As the patch has been out for RFC since early April on the linux-arm-kernel > mailing list (Subject: [RFC] Prohibit ioremap() on kernel managed RAM), > and no comments have come back from Qualcomm folk. We are investigating the impact of this change on us, and I will send out more detailed comments next week. > > The restriction on creation of multiple V:P mappings with differing > attributes is also fairly hard to miss in the ARM architecture > specification when reading the sections about caches. > Larry Bassel -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>