Boris Ostrovsky writes ("[PATCH v5 03/21] acpi: Prevent GPL-only code from
seeping into non-GPL binaries"):
> Some code (specifically, introduced by commit 801d469ad ("[HVM] ACPI
> support patch 3 of 4: ACPI _PRT table.")) has only been licensed under
> GPLv2. We want to prevent this code from showing up in non-GPL
> binaries which might become possible after we make ACPI builder code
> available to users other than hvmloader.
>
> There are two pieces that we need to be careful about:
> (1) A small chunk of code in dsdt.asl that implements _PIC method
> (2) A chunk of ASL generator in mk_dsdt.c that describes with PCI
> interrupt routing.
>
> This code will now be generated by a GPL-only script which will be
> invoked only when ACPI builder's Makefile is called with GPL variable
> set.
>
> We also strip license header from generated ASL files to prevent
> inadverent use of those files with incorrect license.
>
> Signed-off-by: Boris Ostrovsky <[email protected]>
Acked-by: Ian Jackson <[email protected]>
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