Hi Vinod, After merging the slave-dma tree, today's linux-next build (x86_64 allmodconfig) failed like this: drivers/dma/sun6i-dma.c: In function 'sun6i_dma_dump_chan_regs': drivers/dma/sun6i-dma.c:203:2: error: implicit declaration of function '__virt_to_phys' [-Werror=implicit-function-declaration] phys_addr_t reg = __virt_to_phys((unsigned long)pchan->base); ^ Caused by commit 555859308723 ("dmaengine: sun6i: Add driver for the Allwinner A31 DMA controller"). Presumably missing an include file. I have used the slave-dma tree from next-20140725 for today. -- Cheers, Stephen Rothwell sfr@canb.auug.org.au