wip: fix(driver): fix build of kmod on linux 6.10.

[FedeDP]

What type of PR is this?

/kind bug

Any specific area of the project related to this PR?

/area driver-kmod

Does this PR require a change in the driver versions?

What this PR does / why we need it:

https://github.com/torvalds/linux/commit/c4aab26253cd1f302279b8d6b5b66ccf1b120520, included in linux 6.10-rc1, moved fd_is_open away from an header we can include. Therefore the proposed patch is to implement ourself the one-liner.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Keeping it as wip until linux 6.10 is nearly released. I'll use this PR for tests if more changes are needed.

Does this PR introduce a user-facing change?:

fix(driver): fix build of kmod on linux 6.10.

[FedeDP]

/milestone next-driver

[FedeDP]

Kmod build is now ok: https://github.com/falcosecurity/libs/actions/runs/9300407315/job/25596333511

[Andreagit97]

LGTM! I would just add the kernel commit link also in the code not just in the PR

[FedeDP]

Done, anyway, let's wait for at least 6.10-rc6 before unholding :)

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, LucaGuerra

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Needs approval from an approver in each of these files:

• ~~driver/OWNERS~~ [Andreagit97,FedeDP,LucaGuerra]

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[FedeDP]

RC3: still ok: https://github.com/falcosecurity/libs/actions/runs/9544785509/job/26304199255

[leogr]

Hey @FedeDP

What's missing here? :thinking:

[FedeDP]

RC5 still ok: https://github.com/falcosecurity/libs/actions/runs/9675438479/job/26692952935

[FedeDP]

Green against rc7: https://github.com/falcosecurity/libs/actions/runs/9869833752/job/27254326144 Removing wip and merging.

[FedeDP]

/milestone 7.2.1+driver