Re: In-kernel parser for the BMOF format used by WMI-ACPI

[Armin Wolf]

Am 11.03.25 um 21:13 schrieb Pali Rohár:

> On Tuesday 11 March 2025 21:06:16 Armin Wolf wrote:
> >   - Is there any way to check whether the Doublespace compression algorithm is still encumbered by patents?
> Linux kernel 2.2 or 2.4 had full read/write support for doublespace
> compression algorithm in mainline kernel and it was connected with fat
> driver. IIRC it was dropped for kernel 2.6 because nobody ported that
> vfat code to new fs API and hence doublespace in-kernel compression
> algorithm was not needed/used anymore. But I do not remember details.
>
> So IMHO it should not be a problem to reintroduce same code into kernel
> again if there is a new need for it.
>
> And in my project I reused the doublespace compression code from old
> Linux kernel.

AFAIK only the CVF code used by the dmsdos driver was inside the mainline kernel,
but not the dmsdos driver itself.

Thanks,
Armin Wolf