CODEWITHSUNDEEP
clinux-kernelkernel-module
mlemboy
mlemboy

Reputation: 385

How to call a function from another kernel module in a kernel module?

I've written three kernel modules. A, B, C. B needs some functions from A and C also. How to achieve this. Please be code specific. Any help is appreciated.

Upvotes: 0

Views: 1873

Answers (1)

Asblarf
Asblarf

Reputation: 491

Below the function implementation in A, export it:

#include "moduleA_header.h"

int foo(void)
{
    printk(KERN_NOTICE "Hi there!\n");
}
EXPORT_SYMBOL(foo);

Make sure that the prototype of your function is declared in a header file that you can include in module B. Also, make sure module A gets loaded before module B.

Just make sure that your include has the path right to the moduleA_header.h file.

Upvotes: 1

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