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. 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. -- 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>