c - What's wrong in this allocation? -

this struct declared :-

struct page_table_entry {     struct addrspace* as;     vaddr_t va;     //page_state_t state;     int timestamp; }; 

now want dynamically allocate memory array of this. implementation here :-

struct page_table_entry **coremap = (struct page_table_entry**) kmalloc(npages*sizeof(struct page_table_entry*)); int i; for(i=0;i<npages;i++) {     coremap[i] = (struct page_table_entry*)kmalloc(sizeof(struct page_table_entry));     coremap[i].va=(firstaddress+(i*page_size)); } 

its giving me error on last line accesing variable va. error is:-

error: request member `va' in not structure or union 

you have array of pointers structs, not array of structs.

in line coremap[i] = (struct page_table_entry*)kmalloc(sizeof(struct page_table_entry)); cast memory allocation page_table_entry*, coremap[i] pointer.

you access actual struct via

coremap[i]->va=(firstaddress+(i*page_size));