Getting a custom ramdisk to boot on Android

Question

I am working on a "GNU/Linux on Android" type of project that is based on Mikael Q. Kuisma's work here .

I built a tool that downloads a toolchain, compiles the kernel, archives the custom ramdisk, and finally bundles them into a boot image.

Expected result:

• Kernel boots.
• Ramdisk gets loaded and /init is executed using /sbin/busybox.

Actual result:

• Kernel does boot.
• The kernel never seems to reach /init, and hangs without panicking.

I've tried adding calls to /sbin/busybox poweroff in the /init script to see if it was actually reaching execution, nothing changed.

I identified a few points that seemed problematic, one being this:

[    3.880314] Warning: unable to open an initial console.
[    3.880429] Waiting for root device ... # Might be the problem.
[    4.882304] lct will vote for sdp current
[    4.882437] pmi632_charger: smblib_update_usb_type: lct v02 battery charge APSD=SDP PD=0
[    4.889933] msm-dwc3 7000000.ssusb: DWC3 exited from low power mode
[    5.520181] of_batterydata_get_best_profile: light_4000mAh found
[    8.760236] cfg_timer_func enter
[    8.760267] cfg_work_routine enter
# Nothing appears after this point...

I have included the source code for my build tool with the kernel log buffer in this git repository. You can find the defconfig I used for the kernel build here.

Any help would be appreciated. :)