On Thu, Jan 28, 2021 at 01:38:25PM +0000, Chris Clayton wrote: > Thanks, Thomas. > > On 28/01/2021 11:24, Thomas Backlund wrote: > > Den 28.1.2021 kl. 12:05, skrev Chris Clayton: > >> > >> On 28/01/2021 09:34, Greg Kroah-Hartman wrote: > >>> On Thu, Jan 28, 2021 at 09:17:10AM +0000, Chris Clayton wrote: > >>>> Hi, > >>>> > >>>> Building 5.10.11 fails on my (x86-64) laptop thusly: > >>>> > >>>> .. > >>>> > >>>> AS arch/x86/entry/thunk_64.o > >>>> CC arch/x86/entry/vsyscall/vsyscall_64.o > >>>> AS arch/x86/realmode/rm/header.o > >>>> CC arch/x86/mm/pat/set_memory.o > >>>> CC arch/x86/events/amd/core.o > >>>> CC arch/x86/kernel/fpu/init.o > >>>> CC arch/x86/entry/vdso/vma.o > >>>> CC kernel/sched/core.o > >>>> arch/x86/entry/thunk_64.o: warning: objtool: missing symbol for insn at offset 0x3e > >>>> > >>>> AS arch/x86/realmode/rm/trampoline_64.o > >>>> make[2]: *** [scripts/Makefile.build:360: arch/x86/entry/thunk_64.o] Error 255 > >>>> make[2]: *** Deleting file 'arch/x86/entry/thunk_64.o' > >>>> make[2]: *** Waiting for unfinished jobs.... > >>>> > >>>> .. > >>>> > >>>> Compiler is latest snapshot of gcc-10. > >>>> > >>>> Happy to test the fix but please cc me as I'm not subscribed > >>> > >>> Can you do 'git bisect' to track down the offending commit? > >>> > >> > >> Sure, but I'll hold that request for a while. I updated to binutils-2.36 on Monday and I'm pretty sure that is a feature > >> of this build fail. I've reverted binutils to 2.35.1, and the build succeeds. Updated to 2.36 again and, surprise, > >> surprise, the kernel build fails again. > >> > >> I've had a glance at the binutils ML and there are all sorts of issues being reported, but it's beyond my knowledge to > >> assess if this build error is related to any of them. > >> > >> I'll stick with binutils-2.35.1 for the time being. > >> > >>> And what exact gcc version are you using? > >>> > >> > >> It's built from the 10-20210123 snapshot tarball. > >> > >> I can report this to the binutils folks, but might it be better if the objtool maintainer looks at it first? The > >> binutils change might just have opened the gate to a bug in objtool. > >> > >>> thanks, > >>> > >>> greg k-h > >>> > >> > > > > > > AFAIK you need this in stable trees: > > > > From 1d489151e9f9d1647110277ff77282fe4d96d09b Mon Sep 17 00:00:00 2001 > > From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > > Date: Thu, 14 Jan 2021 16:14:01 -0600 > > Subject: [PATCH] objtool: Don't fail on missing symbol table > > > > > > That may be the caae, but it doesn't fix the build failure I've reported in this thread. However, as suggested by Tor, > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/patch/?id=5e6dca82bcaa49348f9e5fcb48df4881f6d6c4ae does fix it. > > That hasn't made Linus' tree yet and I don't see a pull request, but it is in linux-next so I guess it could make it in > -rc6. I mistakenly thought this was already in Linus' tree and submitted this patch to stable a few days ago. I talked to Boris (-tip maintainer), he's going to submit a pull request to Linus this weekend. -- Josh
