How to call functions and variables from the kernel module (A) in the kernel module (B), and then send a notification to user space?

Question

I am developing an application (user space) that sends notifications of changes in values across a network.

I want to develop a kernel module (A) to notify my application (user space) if a value changes in a parameter in another kernel module (B).

How to send a signal from the kernel module (A) to my user space application?
How to send data from kernel module (A) to my user space application?
How to call functions and variables from the kernel module (A) in the kernel module (B)?

+5

Mohammed Apr 6 '12 at 9:13

1 answer

Shahbaz · Accepted Answer · 2012-04-06T09:34:06+0000

Access to module B from module A

B, C-, /, A , , , #include A.

B :

EXPORT_SYMBOL(your_symbol);

/.

Makefile A , Module.symvers of B KBUILD_EXTRA_SYMBOLS, , CONFIG_MODVERSIONS

, . Linux (RTAI) , , , , Linux. ( ) ( ) . Linux, .

(, , ), /sys /proc, 0/1, , . .