what happens to "open" if the slot is left empty in file_operations.

Sudip Mukherjee sudipm.mukherjee at gmail.com
Sat Nov 14 03:16:14 EST 2015

On Sat, Nov 14, 2015 at 12:40 PM, Shiyao Ma <i at introo.me> wrote:

> Hi,
> When writing a char device driver, if the "open" slots is left vacant in
> the file_operations structure, what will happen if "open" is called ?

You can have a loot at chrdev_open() function in  fs/char_dev.c  file.

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