A small fix for a compiler warning. Thanks to Michał Mirosław for suggesting the solution! Patch history below: - v5 - fix 32-bit compiler warning about the 32+64 compat pointer - v4 - replace postsleep udelay() with usleep_range() - add cmd_timeout_ms field for R1B commands - v3 - copy data from userspace before claiming host - break out copy from userspace into its own function - verify that caller has CAP_SYS_RAWIO - rename ``struct sd_ioc_cmd`` to ``struct mmc_ioc_cmd`` because it applies generally, not just to SD - make struct mmc_ioc_cmd the same between 32-bit and 64-bit to simplify compat_ioctl() - export include/linux/mmc/ioctl.h when you ``make headers_install`` - v2 - make initialization of struct declarations match kernel style - only allow ioctl() on whole block device, not partition - remove extraneous printks - implement compat_ioctl() - remove version field from ``struct sd_ioc_cmd`` John