On 10/28/2016 02:44 PM, Vineet Gupta wrote: > This is configuration specific, and something caused your compiler to >> be built assuming that size_t is unsigned long, while the kernel >> headers are assuming it should be unsigned int. So yes this seems to be target specific gcc thing for ARC 4.8 #define PTRDIFF_TYPE "int" ARM #ifndef PTRDIFF_TYPE #define PTRDIFF_TYPE (TARGET_AAPCS_BASED ? "int" : "long int") #endif ARC gcc 6.2 #undef PTRDIFF_TYPE #define PTRDIFF_TYPE "long int"