Expand array linux kernel module

Question

i have an array

char* temp;
temp=kmalloc(3,GFP_KERNEL);

i need to expand this array each time i call this function Note: Realloc can't be used in linux kernel i dont know if it exists

Answer 1

Roll your own realloc but be noted that realloc is a poorly designed function interface. Just allocate a new buffer with kmalloc and memcpy the old data into the new buffer; that's essentially all that realloc does if it cannot expand the buffer in place.