feat: fix linux kernel 6.18 building problem

[gfdgd-xi]

因为 6.18 内核头文件已定义 init_mnt_ns 与 dkms 内的 init_mnt_ns 函数发生冲突导致编译不过，故修改 init_mnt_ns 函数名以规避该问题

linux/mnt_namespace.h:14:extern struct mnt_namespace init_mnt_ns;
linux/ns_common.h:22:extern struct mnt_namespace init_mnt_ns;

Summary by Sourcery

Bug Fixes:

• Resolve a build failure on Linux kernel 6.18 by renaming the vfs_kretprobes init_mnt_ns helper and updating its associated log message.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Renames the module-local init_mnt_ns() helper to init_mnt_ns_data() and updates its log message and caller to avoid symbol name conflicts with the Linux 6.18 kernel headers while preserving existing behavior.

Class diagram for renamed init_mnt_ns helper function

classDiagram
    class VfsKretprobesModule {
        <<module>>
        - struct mnt_namespace* target_mnt_ns
        - int init_mnt_ns_data()
        + int init_vfs_kretprobes(void vfs_changed_func)
    }

    VfsKretprobesModule : init_vfs_kretprobes() calls init_mnt_ns_data()

Loading

File-Level Changes

Change	Details	Files
Rename the internal mount-namespace initialization helper to avoid collision with a new kernel symbol in Linux 6.18.	Rename static inline function init_mnt_ns() to init_mnt_ns_data() Update error log message string to reflect the new helper name Update init_vfs_kretprobes() to call init_mnt_ns_data() instead of the old name	src/kernelmod/vfs_kretprobes.c

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: gfdgd-xi

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[deepin-ci-robot]

Hi @gfdgd-xi. Thanks for your PR.

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider choosing a more descriptive function name than init_mnt_ns_data (e.g., indicating it initializes target_mnt_ns or is a workaround for kernel 6.18) to make its role clearer and distinguish it from the kernel symbol by intent, not just by suffix.
• It may help future maintainers to add a brief comment near the function definition explaining that the rename is specifically to avoid the init_mnt_ns symbol collision introduced in Linux kernel 6.18.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider choosing a more descriptive function name than `init_mnt_ns_data` (e.g., indicating it initializes `target_mnt_ns` or is a workaround for kernel 6.18) to make its role clearer and distinguish it from the kernel symbol by intent, not just by suffix.
- It may help future maintainers to add a brief comment near the function definition explaining that the rename is specifically to avoid the `init_mnt_ns` symbol collision introduced in Linux kernel 6.18.

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