Hello, its an unsigned constant. david On Sat, Jun 18, 2011 at 06:39:45PM +0300, Daniel Redway wrote: > Hello > > I dont understand what means 'U' character. I found this defines in > asm/ioctl.h file. > Thanks > > #define _IOC_NONE 1U > #define _IOC_READ 2U > #define _IOC_WRITE 4U > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies