Linus Torvalds wrote:
[...]
Side note: if people want to, we could have other "trampolines" like that,
so that we could have more user-level code that gets distributed with the
kernel. It doesn't have to be something that gets mapped into every binary
either: we could - if we wanted to - have things like shared libraries or
helper shell scripts or whatever that we expose in /sys/shlib/ that are
kernel-version dependent.
Do you envision this being used for stuff like libalsa, libusb, a v4l2
lib, etc.?
I always felt that this kind of libraries are sort of "part of the
kernel" in the sense that programs really do need them to interface with
the kernel. (*)
If we had a privelidged libv4l2 library like that then things like
format conversion and video encoding / decoding could be done in user
space and we could provide a more "high level" standard interface for
user programs.
This is the sort of thing that libalsa already does with audio software
mixing (for instance) with the advantage that we need to keep the
interface between libalsa and the kernel across kernel versions.
Of course, the interface exported by these libraries would now be the
official kernel interface.
--
Paulo Marques - www.grupopie.com
Pointy-Haired Boss: I don't see anything that could stand in our way.
Dilbert: Sanity? Reality? The laws of physics?
(*) Yeah, one can write programs that don't use the libraries, but that
is just asking for trouble...
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