On Mon, Jul 20, 2015 at 12:03:07PM +0200, Ahmed Soliman wrote: > currently I started reading through the linux kernel and I started > reading liunx/include/linux/list.h> I understood some of the functions > but still I dont know what does these lines of code do > #ifndef _LINUX_LIST_H > #define _LINUX_LIST_H > which exist at the very beginning of the file > I also noticed that there is many similar ifndefs in almost any .h > file in the kernel > note that I understand wnat does ifndef do bu I dont understand what > goal is it supposed to achieve at the beginning of the headerfile > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies The whole structure seems to #ifndef ... #define ... . . . #endif _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
