Hi Serguei, > I'm looking for a working patch for the Linux kernel 2.6.28.8 that > would allow using CONFIG_LOGBUFFER (a kernel log buffer shared between > U-Boot and the kernel). I'm using u-boot 1.3.3. When LOGBUFFER is > enabled in the kernel configuration the kernel build fails with: > kernel/built-in.o: In function `setup_ext_logbuff': : undefined > reference to `setup_ext_logbuff_mem'
This is to be expected - CONFIG_LOGBUFFER only worked with arch/ppc. It is broken since the arch/ppc removal and nobody (yet) cared to get it to life again. Only recently there were discussions on the linux-embedded ml[1] which may yield other solutions going mainline. > Could anybody also tell me how the buffer location (I think the size > is fixed to 16K) is communicated to the kernel, via a kernel command > line parameter? If so, what is it? It was placed at a known address relative to the end of RAM. Check arch/ppc/mm/init.c e.g. in our DENX-v2.6.25-stable branch. Cheers Detlev [1] http://www.mail-archive.com/linux-embed...@vger.kernel.org/msg01945.html -- Computers are useless. They can only give you answers. -- Pablo Picasso -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: d...@denx.de _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
