malloc - declare memory to struct in c -

i have struct abc in 1 file

struct abc {     variaables     , functions } 

i using struct in other file follows : struct abc *t = kmalloc(sizeof(struct abc)); kmalloc equivalent malloc

then following errors occur:

expected '=', ',', ';', 'asm' or '__attribute__' before 'struct' error: variable 't' has initializer incomplete type warning: implicit declaration of function 'kmalloc' invalid application of 'sizeof' incomplete type 'struct trapframe' storage size of 't' isn't known 

where going wrong?

1, 2, 4 , 5 errors caused missing ; @ end of struct declaration. must be:

struct abc { variaables , functions };

3 error caused missing including of include/linux/slab.h file. have add below file @ head of source code file:

#include < linux/slab.h> # please remove space before "linux"