[FS#1113] Unknown symbol zlib_inflate

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Sergey Ninua (ffix) 

Attached to Project - LEDE Project
Summary - Unknown symbol zlib_inflate
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - I've experienced a strange issue with zlib_inflate on x84_64 system.
There is no zlib_inflate-related symbols at /proc/kallsyms and modules like btrfs couldn't be loaded.

17.01 branch and the current master branch, both are affected.

Steps to reproduce:
1. Use attached config file (zlib_inflate-test-config). It's almost default but I've set CONFIG_PACKAGE_kmod-fs-btrfs=y and some other options.
2. Compile LEDE:
make defconfig && make -j $(nproc)
3. Run qemu:
qemu-system-x86_64 -curses -kernel bin/targets/x86/64/lede-x86-64-ramfs.bzImage
4. Try to load btrfs module:
root at LEDE:/# modprobe btrfs
[   23.345891] btrfs: Unknown symbol zlib_inflateInit2 (err 0)
[   23.347096] btrfs: Unknown symbol zlib_inflate (err 0)
[   23.347673] btrfs: Unknown symbol zlib_inflate_workspacesize (err 0)
[   23.348293] btrfs: Unknown symbol zlib_inflateEnd (err 0)



It's not btrfs related but any module with zlib_inflate in it's dependency list.


One or more files have been attached.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1113