On Sat, Jun 30, 2018 at 11:12 AM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Sat, 30 Jun 2018 11:07:20 -0700 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > >> On Sat, 30 Jun 2018 12:27:09 +0200 Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote: >> >> > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >> > > head: 1904148a361a07fb2d7cba1261d1d2c2f33c8d2e >> > > commit: 758517202bd2e427664857c9f2aa59da36848aca arm: port KCOV to arm >> > > date: 2 weeks ago >> > > config: arm-allmodconfig (attached as .config) >> > > compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0 >> > > reproduce: >> > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross >> > > chmod +x ~/bin/make.cross >> > > git checkout 758517202bd2e427664857c9f2aa59da36848aca >> > > # save the attached .config to linux build tree >> > > GCC_VERSION=7.2.0 make.cross ARCH=arm >> > > >> > > All errors (new ones prefixed by >>): >> > > >> > > /tmp/cctnQ1CM.s: Assembler messages: >> > >>> /tmp/cctnQ1CM.s:35: Error: .err encountered >> > > /tmp/cctnQ1CM.s:36: Error: .err encountered >> > > /tmp/cctnQ1CM.s:37: Error: .err encountered >> > >> > Hi kbuild test robot, >> > >> > The fix was mailed more than a month ago, but still not merged into >> > the tree. That's linux... >> >> That was a rather unhelpful email. >> >> I've just scanned all your lkml emails since the start of May and >> cannot find anything which looks like a fix for this issue. >> >> Please resend. About three weks ago :( > > OK, with a bi of amazing sleuthing I found this from Arnd, which is what > I presume you're referring to? > > > > From: Arnd Bergmann <arnd@xxxxxxxx> > Subject: ARM: disable KCOV for trusted foundations code > > The ARM trusted foundations code is currently broken in linux-next when > CONFIG_KCOV_INSTRUMENT_ALL is set: > > /tmp/ccHdQsCI.s: Assembler messages: > /tmp/ccHdQsCI.s:37: Error: .err encountered > /tmp/ccHdQsCI.s:38: Error: .err encountered > /tmp/ccHdQsCI.s:39: Error: .err encountered > scripts/Makefile.build:311: recipe for target 'arch/arm/firmware/trusted_foundations.o' failed > > I could not find a function attribute that lets me disable > -fsanitize-coverage=trace-pc for just one function, so this turns it off > for the entire file instead. > > Link: http://lkml.kernel.org/r/20180529103636.1535457-1-arnd@xxxxxxxx > Fixes: 758517202bd2e4 ("arm: port KCOV to arm") > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Cc: Mark Rutland <mark.rutland@xxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Solves it on my builder at least. Would be good to get this in. Acked-by: Olof Johansson <olof@xxxxxxxxx> -Olof
