From: "Luis R. Rodriguez" <mcgrof@xxxxxxxxxxxxxxxx> This is just test work I've been doing on the side, that really just started from scratching an itch to see what is possible. In the compat-drivers trees I had actually gotten to run time test the USB video camera driver and that worked fine. Under the new backports tree we are encouraged to just backport the entire subsystem so I gave that a shot and this is where I got up to. It turned out a few drivers required mucking with the regulator and as I started backporting some functionality I realized that the 3.2 regulator was just stubs so ended up trying to port all of the regulator and its drivers as well. The media drivers should now compile *if* we fix the regulator issues but as it turns out the last issues I ran into hit a gcc segfault :) These patches depend on the other 9 patches I just posted. I hadn't tested ckmake yet with the other patches... Note one thing I realize from this exercise is that it'd be nice to be able to rename the upstream target file when being sucked into compat as part of compat-y or perhaps its best to do this always with a _backport prefix ? See core.c from regulator and how it gets pulled into compat/ I do realize that porting the regulator code may not make make sense and if so then perhaps any media drivers that rely on it shoud likley not be ported... But that sounds like a cheap "solution". For mobile for example I do envision it being desirable to port over any media or regulator drivers. One possibility I have only been toying with in thought has been using ksplice... but that seems a bit over kill and likely very fragile for adding new symbols. Can we extend a kernel with backport ELF sections ? If so so, we don't necessarily need to have the functionality to patch a kernel and keep it running at runtime but *if* this is possible perhaps that may allow for us to add our own sections to call on the kernel. The only issue with that of course is that then compat-y as a whole would need to be thrown in there. CC [M] /home/mcgrof/tmp/build/compat/main.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.3.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.4.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.5.o CC [M] /home/mcgrof/tmp/build/compat/user_namespace.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.6.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.7.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.8.o CC [M] /home/mcgrof/tmp/build/compat/compat-3.9.o CC [M] /home/mcgrof/tmp/build/compat/core.o Segmentation fault make[8]: *** [/home/mcgrof/tmp/build/compat/core.o] Error 139 Luis R. Rodriguez (3): compat: redefine core_initcall() and late_initcall() backports: add support for voltage / current regulator subsystem backports: add media subsystem drivers .blacklist.map | 9 + backport/Makefile.kernel | 8 + backport/Makefile.real | 1 + backport/compat/Kconfig | 18 + backport/compat/main.c | 5 + backport/defconfigs/media | 506 ++++++++++++++++++++ backport/defconfigs/regulator | 63 +++ backport/include/linux/compat-2.6.h | 15 + backport/include/linux/compat-3.3.h | 8 + copy-list | 44 ++ dependencies | 6 + lib/blacklist.sh | 35 ++ .../media/0001-media_entity_info.patch | 67 +++ .../regulator/0001-disable-ftrace.patch | 74 +++ 14 files changed, 859 insertions(+) create mode 100644 .blacklist.map create mode 100644 backport/defconfigs/media create mode 100644 backport/defconfigs/regulator create mode 100755 lib/blacklist.sh create mode 100644 patches/collateral-evolutions/media/0001-media_entity_info.patch create mode 100644 patches/collateral-evolutions/regulator/0001-disable-ftrace.patch -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe backports" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
