[linux-6.18.y] symbols: Export symbols needed by Android Drivers

[gfdgd-xi]

Export the currently un-exported symbols to support some Android emulator such as kmre and so on.

Summary by Sourcery

Export previously internal kernel symbols required by Android driver and emulator support.

Enhancements:

• Make binder security hooks available to out-of-tree modules via GPL symbol exports.
• Expose list_lru add/delete helpers as GPL-exported symbols for external users.
• Export file_close_fd, init_ipc_ns, put_ipc_ns, can_nice, __wake_up_pollfree, task_work_add, zap_page_range_single, and lock_vma_under_rcu for use by GPL-licensed kernel modules.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Exports a set of core kernel and security helper symbols as GPL-only to support out-of-tree Android drivers and emulator components, without changing their internal behavior.

Sequence diagram for Android driver using binder security helper

sequenceDiagram
    actor AndroidDriver
    participant Kernel as KernelModuleBinder
    participant Security as LSMHooks

    AndroidDriver->>Kernel: security_binder_transaction(from_cred, to_cred)
    Kernel->>Security: binder_transaction(from_cred, to_cred)
    Security-->>Kernel: decision (allow_or_deny)
    Kernel-->>AndroidDriver: return decision

Loading

File-Level Changes

Change	Details	Files
Export binder LSM helper functions for use by out-of-tree Android modules	Add EXPORT_SYMBOL_GPL declarations for security_binder_set_context_mgr Add EXPORT_SYMBOL_GPL declarations for security_binder_transaction Add EXPORT_SYMBOL_GPL declarations for security_binder_transfer_binder Add EXPORT_SYMBOL_GPL declarations for security_binder_transfer_file	security/security.c
Expose list LRU helpers to GPL modules	Export list_lru_add for external use Export list_lru_del for external use	mm/list_lru.c
Expose file descriptor close helper to GPL modules	Export file_close_fd to allow external modules to close FDs and get struct file	fs/file.c
Expose IPC namespace and lifetime management helpers	Export init_ipc_ns to make the initial IPC namespace visible to modules Export put_ipc_ns so modules can safely drop references to IPC namespaces	ipc/msgutil.c ipc/namespace.c
Expose scheduling and waitqueue helpers	Export can_nice so external code can validate nice level changes Export __wake_up_pollfree for modules interacting with poll waitqueues	kernel/sched/syscalls.c kernel/sched/wait.c
Expose task work and memory management helpers	Export task_work_add so modules can enqueue task work callbacks Export zap_page_range_single so modules can unmap page ranges Export lock_vma_under_rcu to allow RCU-safe VMA locking in modules	kernel/task_work.c mm/memory.c mm/mmap_lock.c

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[deepin-ci-robot]

Hi @gfdgd-xi. Thanks for your PR.

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[deepin-ci-robot]

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