On Wed, Jun 07, 2017 at 08:12:01PM -0300, Mauro Carvalho Chehab wrote: > Em Wed, 7 Jun 2017 22:17:50 +0200 > Matthias Schwarzott <zzam@xxxxxxxxxx> escreveu: > > > Am 07.06.2017 um 20:23 schrieb Mauro Carvalho Chehab: > > > Em Tue, 9 May 2017 06:56:25 +0200 > > > Matthias Schwarzott <zzam@xxxxxxxxxx> escreveu: > > > > > >> Hi! > > >> > > >> Whenever I compile the media drivers using media_build against a recent > > >> kernel, I get this message when loading them: > > >> > > >> [ 5.848537] media: Linux media interface: v0.10 > > >> [ 5.881440] Linux video capture interface: v2.00 > > >> [ 5.881441] WARNING: You are using an experimental version of the > > >> media stack. > > >> ... > > >> [ 6.166390] videobuf2_memops: Unknown symbol put_vaddr_frames (err 0) > > >> [ 6.166394] videobuf2_memops: Unknown symbol get_vaddr_frames (err 0) > > >> [ 6.166396] videobuf2_memops: Unknown symbol frame_vector_destroy (err 0) > > >> [ 6.166398] videobuf2_memops: Unknown symbol frame_vector_create (err 0) > > >> > > >> That means I am not able to load any drivers being based on > > >> videobuf2_memops without manual actions. > > >> > > >> I used kernel 4.11.0, but it does not matter which kernel version > > >> exactly is used. > > >> > > >> My solution for that has been to modify mm/Kconfig of my kernel like > > >> this and then enable FRAME_VECTOR in .config > > > > > > Well, if you build your Kernel with VB2 compiled, you'll have it. > > > > > Sure. > > > > So my question is: > > How good do the kernel origin vb2 and the media_build vb2 play together? > > > > Will modprobe always choose the media_build one? > > Or will "make install" just overwrite the original file? > > make install *should* overwrite the old one. If not, then there's a problem > at the media-build makefile [1]. > There is a problem. make install has been broken for at least a week, see the thread "media_build: fails to install" The reason is that scripts/make_makefile.pl aborts make[1]: Entering directory '/home/me/git/clones/media_build/v4l' scripts/make_makefile.pl Can't handle includes! In ../linux/drivers/staging/media/atomisp/pci/atomisp2/css2400/Makefile at scripts/ make_makefile.pl line 109, <GEN152> line 4. is because that css2400/Makefile includes another: $ cat ../linux/drivers/staging/media/atomisp/pci/atomisp2/css2400/Makefile ccflags-y += -DISP2400B0 ISP2400B0 := y include $(srctree)/$(src)/../Makefile.common The abort of scripts/make_makefile.pl means that the v4l/Makefile does not get completely written out, in particular the rules for making the 'media-install' target. I am not sure how to fix this. The make_makefile.pl deliberately falls over when given an include to deal with, so there must be some other mechanism in the media_build framework that handles this kind of thing. But I am not aware of it. Vince
