On Friday 12 August 2011, Marek Szyprowski wrote: > > From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> > > Steal memory from the kernel to provide coherent DMA memory to drivers. > This avoids the problem with multiple mappings with differing attributes > on later CPUs. > > Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> > [m.szyprowski: rebased onto 3.1-rc1] > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Hi Marek, Is this the same patch that Russell had to revert because it didn't work on some of the older machines, in particular those using dmabounce? I thought that our discussion ended with the plan to use this only for ARMv6+ (which has a problem with double mapping) but not on ARMv5 and below (which don't have this problem but might need dmabounce). Arnd -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>