* what happens to "open" if the slot is left empty in file_operations.
@ 2015-11-14 7:10 Shiyao Ma
2015-11-14 8:16 ` Sudip Mukherjee
0 siblings, 1 reply; 2+ messages in thread
From: Shiyao Ma @ 2015-11-14 7:10 UTC (permalink / raw)
To: kernelnewbies
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 ?
An answer that gives the relevant code will be more than appreciated.
Thanks.
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* what happens to "open" if the slot is left empty in file_operations.
2015-11-14 7:10 what happens to "open" if the slot is left empty in file_operations Shiyao Ma
@ 2015-11-14 8:16 ` Sudip Mukherjee
0 siblings, 0 replies; 2+ messages in thread
From: Sudip Mukherjee @ 2015-11-14 8:16 UTC (permalink / raw)
To: kernelnewbies
On Sat, Nov 14, 2015 at 12:40 PM, Shiyao Ma <i@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.
regards
sudip
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