Add extra memory barrier
Detail: s/DMA - Although there are already plenty of memory barriers present to deal with the BCM2835's dodgy peripheral interface, code examination suggests one extra barrier is needed to make sure things will work correctly once the default NCB cache policy is Normal, non-cacheable rather than Device. Admin: Tested on Raspberry Pi 1 Version 0.47. Tagged as 'BCM2835-0_47'
Showing with 11 additions and 10 deletions