On 13/12/16 15:53, Wolfram Sang wrote: > >>> +struct max11100_state { >>> + const struct max11100_chip_desc *desc; >>> + struct spi_device *spi; >>> + int vref_uv; >> >> unsi >> It's good practice to move the smaller members to the end of the structure, >> to avoid gaps due to alignment rules (struct mutex needs to be 64-bit aligned >> on 64-bit platforms). > > One option. Another idea is to put the most used members to the front to > increase chances of being in the same cacheline. > Or more cynically, just put them in the order that makes most logical sense as that gives you fewest grumpy reviewers. We aren't really talking high performance stuff here! Jonathan