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Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due to a kernel NULL pointer dereference)

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due to a kernel NULL pointer dereference)
Date 2015-09-14 11:00 +0200
Message-ID <q8xMe-1gc-11@gated-at.bofh.it> (permalink)
References (5 earlier) <q6N8L-3wZ-17@gated-at.bofh.it> <q80wX-4gj-35@gated-at.bofh.it> <q85mW-2Mn-21@gated-at.bofh.it> <q8wdr-7CL-15@gated-at.bofh.it> <q8wwP-7Ze-23@gated-at.bofh.it>
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On Mon, Sep 14, 2015 at 09:35:04AM +0200, Sedat Dilek wrote:
> > /me goes back to ignoring LLVM for the time being.

> The issue was reported as LLVM PR #9457 [1] and the bug-history [2] says...
> 
>    Reported: 2011-03-11 07:27 CST by PaX Team
> 
> ...so it is a known and old issue.

> Beyond "fixing" or implementing missing (GCC) features on the LLVM-Clang-side...
> People there have some discussion and ideas on a "workaround" or fix
> it on the Linux-kernel-side.

Barring LLVM implementing the relevant function call attributes, you
could look at either generating the required thunks (as mentioned
earlier as a work-around) or at the very least validating that all
required thunks are present.

> I invite you to join the discussion at LLVMLinux...
> As I know... "YES, you can." Linux x86/x86_64 (assembler) Kung-Fu.
> ( I admit I have not these skillz. )

Its a matter of time for me; I simply do not have enough time as it is
so I have to make choices.
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Thread

Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Baoquan He <bhe@redhat.com> - 2015-09-09 04:40 +0200
  Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-09 05:00 +0200
    Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-09 05:20 +0200
    Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Baoquan He <bhe@redhat.com> - 2015-09-09 05:30 +0200
      Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-09 05:50 +0200
        Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Peter Zijlstra <peterz@infradead.org> - 2015-09-09 15:00 +0200
          Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-12 23:30 +0200
            Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Peter Zijlstra <peterz@infradead.org> - 2015-09-14 09:20 +0200
              Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-14 09:40 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-14 10:00 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Peter Zijlstra <peterz@infradead.org> - 2015-09-14 11:00 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Ingo Molnar <mingo@kernel.org> - 2015-09-14 11:40 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Ingo Molnar <mingo@kernel.org> - 2015-09-14 12:00 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-14 12:30 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Ingo Molnar <mingo@kernel.org> - 2015-09-14 14:50 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-14 12:00 +0200
              Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Sedat Dilek <sedat.dilek@gmail.com> - 2015-09-14 09:50 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-09-14 20:00 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Christoph Lameter <cl@linux.com> - 2015-09-14 20:30 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal due  to a kernel NULL pointer dereference) Austin S Hemmelgarn <ahferroin7@gmail.com> - 2015-09-14 20:40 +0200
                Re: [llvmlinux] percpu | bitmap issue? (Cannot boot on bare metal  due to a kernel NULL pointer dereference) Ingo Molnar <mingo@kernel.org> - 2015-09-15 08:20 +0200

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