On Tue, Apr 29, 2014 at 07:18:25PM +0800, Xia Kaixu wrote: > From: Arnd Bergmann <arnd@arndb.de> > > dma_addr_t may be 64 bit wide, which causes a build failure > when doing a division on it. Here it is safe to cast to an > u32 type, which avoids the problem.