Last month, Samsung launched the Galaxy Z Fold 4 and Galaxy Z Flip 4 smartphones with the most advanced features and technologies. The company is doing great with the devices and is now releasing kernel source code for Galaxy Z Fold 4 and Galaxy Z Flip 4 devices to help developers add more features and functions.
The current release software versions are AVGA, intended for US carrier variants. In practice, none of the Samsung Galaxy smartphones sold in the US can actually unlock the bootloader. Unlike global models, these devices are completely closed.
Kernel source code is an essential element of Android Custom ROM. It allocates resources such as hardware, memory pages, and CPU cycles. It is usually responsible for file system and network communication.
These may not be important to regular smartphone users but are certainly helpful to developers who build third-party custom ROMs for devices ( LineageOS, for example). Modifying the sources allows the modding community to come up with custom kernels that add new capabilities that are not offered out of the box.
If you are a developer, you can now visit the Samsung Open Source Release Center and access the Galaxy Z Fold 4 and Galaxy Z Flip 4 kernel source code. Links are mentioned below.