Messages in this thread | | | Date | Wed, 9 Oct 2013 11:54:04 -0700 | Subject | Re: [x86] BUG: unable to handle kernel paging request at 00740060 | From | Linus Torvalds <> |
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On Wed, Oct 9, 2013 at 11:16 AM, Jakub Jelinek <jakub@redhat.com> wrote: > > Confirmed as gcc bug, filed http://gcc.gnu.org/PR58670 > Seems all of 4.[6-9] miscompile it. Will have a look tomorrow > unless somebody beats me to it. But historically, the case where > asm goto labels jump to fallthru basic block had numerous problems in the > past.
Ok, so it isn't even specific for x86-32, because your test-case shows the bug for me on 64-bit too. Apparently we just have a harder time hitting it in practice in the kernel on x86-64./
Too bad. It makes me nervous about all our _traditional_ uses of asm goto too, never mind the new ones..
Linus
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