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Groups > linux.kernel > #1405035

Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame

From Brian Gerst <brgerst@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame
Date 2016-05-22 21:30 +0200
Message-ID <rBHex-4D3-3@gated-at.bofh.it> (permalink)
References <rBhDs-5HD-5@gated-at.bofh.it> <rBhDt-5HD-25@gated-at.bofh.it> <rBFZ9-3Y4-57@gated-at.bofh.it>
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On Sun, May 22, 2016 at 2:01 PM, Andy Lutomirski <luto@amacapital.net> wrote:
> On Sat, May 21, 2016 at 9:04 AM, Brian Gerst <brgerst@gmail.com> wrote:
>> Instead of setting up a fake pt_regs context, put the kernel thread
>> function pointer and arg into the unused callee-restored registers
>> of struct fork_frame.
>>
>> Signed-off-by: Brian Gerst <brgerst@gmail.com>
>
> Seems reasonable.  Can you make sure you explicitly test with
> something that uses the usermodehelper mechanism?
>
> --Andy

kernel_init() does the same thing to spawn init, so it wouldn't boot otherwise.

--
Brian Gerst

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Thread

[PATCH 0/4] x86: Rewrite switch_to() Brian Gerst <brgerst@gmail.com> - 2016-05-21 18:10 +0200
  [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Brian Gerst <brgerst@gmail.com> - 2016-05-21 18:10 +0200
    Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Andy Lutomirski <luto@amacapital.net> - 2016-05-22 20:10 +0200
      Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Brian Gerst <brgerst@gmail.com> - 2016-05-22 21:30 +0200
    Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Josh Poimboeuf <jpoimboe@redhat.com> - 2016-05-23 17:30 +0200
      Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Andy Lutomirski <luto@amacapital.net> - 2016-05-23 17:40 +0200
        Re: [PATCH 4/4] x86: Pass kernel thread parameters in fork_frame Brian Gerst <brgerst@gmail.com> - 2016-05-23 23:10 +0200
  [PATCH 1/4] x86: Save return value from kernel_thread Brian Gerst <brgerst@gmail.com> - 2016-05-21 18:10 +0200
    Re: [PATCH 1/4] x86: Save return value from kernel_thread Andy Lutomirski <luto@amacapital.net> - 2016-05-22 03:50 +0200
      Re: [PATCH 1/4] x86: Save return value from kernel_thread Brian Gerst <brgerst@gmail.com> - 2016-05-22 04:20 +0200

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