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How to do Embedded Linux [not] right
Differences to PC Linux
Differences to Linux on a PC
In the Embedded world
every CPU/SoC maker runs their own kernel tree
often one kernel tree per product, based on different mainline versions
ages-old base revisions
a never-ending security nightmare
no benefit from recent new features in mainline
non-standard subsystems (e.g. different USB device or SDIO stack)
proprietary drivers cause lock-in to old kernels
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