Re: [x86] BUG: unable to handle kernel paging request at 00740060

[Linus Torvalds]

On Wed, Oct 9, 2013 at 11:16 AM, Jakub Jelinek <jakub@xxxxxxxxxx> 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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