On Mon, Jan 24, 2022 at 3:26 PM Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > On Tue, Jan 18, 2022 at 3:01 PM Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > > > > Apparently this patch isn't going to work after all :-( > > > > https://lkml.kernel.org/r/202201190632.lhlaiCBk-lkp@xxxxxxxxx > > I noticed in that report and > https://lore.kernel.org/lkml/202201190702.XNSXrMTK-lkp@xxxxxxxxx/ > that gcc-9 was used. I wonder if %= has been fixed in gcc-10+? Have > there been other reports with gcc-10+ for my patch? > > Boris' case of xfrm_output_resume is yet a third case; Boris, what > version of gcc did you spot that with? > > If this is fixed in gcc-10, then we can probably add a comment with a > FIXME link to the issue or commit to replace __COUNTER__ with %= one > day. If not, then we can probably come up with a reduced test case > for the GCC devs to take a look at, then add the FIXME comment to > kernel sources. $ wget https://download.01.org/0day-ci/archive/20220119/202201190702.XNSXrMTK-lkp@xxxxxxxxx/config -O .config $ make -j72 -s olddefconfig drivers/net/wireless/mac80211_hwsim.o drivers/net/wireless/mac80211_hwsim.o: warning: objtool: mac80211_hwsim_tx()+0x9aa: unreachable instruction $ gcc --version gcc (Debian 11.2.0-12) 11.2.0 :( Let me see if I can come up with a reduced test case that I will report upstream to https://gcc.gnu.org/bugzilla/. -- Thanks, ~Nick Desaulniers
