I read following link Linux Device Driver Program, where the program starts?
as per this all system calls operate independent to each other.
1> Then how to share common memory between different system call & interrupt handler. but there should be some way to allocate memory ... so that they have common access to a block of memory.
2> Also which pointer to allocate the memory? so that it is accessiable by all ?
Is there some example which uses driver private data ?