Messages in this thread | | | Date | Wed, 9 Oct 2013 16:32:26 +0200 | From | Ingo Molnar <> | Subject | Re: [x86] BUG: unable to handle kernel paging request at 00740060 |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> > This is what we are going to return. But note that -20(%ebp) was not > > initialized if TIF_NOTIFY_RESUME was already set, "jc .L2" skips .L5 > > above. IOW, in this case we seem to return a random value from stack. > > I think you're quite right, and I can confirm I can reproduce this with > gcc-4.8.1 and Wu's .config: > > [...] > > Once I force a x86_64 build using the 'same' config it goes away and > generates 'sensible' code again [...]
So this at least opens up the possibility that we can create a not too painful quirk and only use the 'asm goto' optimization tricks on 64-bit kernels?
Thanks,
Ingo
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