optimize: make mntinfo_add_list O(1) by adding a tail pointer

[ankushT369]

The mntinfo_add_list function previously traversed the entire linked list to find the tail node, resulting in a time complexity of O(n). This commit introduces a mntinfo_tail pointer to track the last node of the list, reducing the time complexity of insertion to O(1).

This change addresses the FIXME comment in the code and improves performance for large lists.

[ankushT369]

Could someone please review this PR? If there are any issues, could you kindly point them out and suggest how I can resolve them?

[adrianreber]

If you look at the output of the CI runs you can see that all mount related tests are now failing.

[ankushT369]

Thankyou for replying @adrianreber yea I am getting some mount related test failing. But in my system it worked fine and tests are passed. How will I know about other systems and rectify that according to that (apologies if it's a very beginner type question I am new to this).

[adrianreber]

Good to heat that tests are passing on your system, but make sure they also work in our different CI setups.

How will I know about other systems

Just have a look what is running in CI

and rectify that according to that

Unfortunately I do not know. Maybe use a container to reproduce the different setups we have in CI.