On Fri, Apr 15, 2016 at 08:04:53AM -0400, Robert P. J. Day wrote: > > is there a single, decent online doc that explains the proper data > types (int16_t, int32_t and so on) to use in kernel code? First off, never use int16_t and friends, that's not ok :) Second, it's simple, use: u8 u16 u32 u64 and friends in kernel code (s8, s16, and so on for signed values.) 'int' is a return type, and for loops and other things that you know will fit in that size. > including the relationship with types to be used in code to be > exported to user space (include/uapi/linux/types.h)? For values that cross the user/kernel boundry, add '__' to the front of the variable: __u8 __u16 __u32 and so on. NEVER use 'int' or 'long' crossing that boundry, it's not going to work properly. I think one of the chapters in LDD3 describes all of this, you might want to re-read it for the details. hope this helps, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
