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Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field

From Ingo Molnar <mingo@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field
Date 2016-02-27 12:50 +0100
Message-ID <r6LxL-2kH-1@gated-at.bofh.it> (permalink)
References <r6uwV-6GL-1@gated-at.bofh.it> <r6uGC-6KV-23@gated-at.bofh.it> <r6yTU-1pV-13@gated-at.bofh.it>
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* Stephen Rothwell <sfr@canb.auug.org.au> wrote:

> Hi,
> 
> On Fri, 26 Feb 2016 09:44:00 -0800 "H. Peter Anvin" <hpa@zytor.com> wrote:
> >
> > 
> > __u64 is okay, "unsigned long" is really messy in the presence of 32-on-64 bit ABIs...
> 
> Yeah, but unfortunately, any 64 bit scalar type here will change the
> alignment of the enclosing unions on (some) 32 bit platforms and thus
> break the ABI.

Then a different solution has to be found.

Thanks,

	Ingo

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Thread

[PATCH] x86, pkeys: fix siginfo ABI breakage from new field Dave Hansen <dave@sr71.net> - 2016-02-26 18:40 +0100
  Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field "H. Peter Anvin" <hpa@zytor.com> - 2016-02-26 18:50 +0100
    Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Stephen Rothwell <sfr@canb.auug.org.au> - 2016-02-26 23:20 +0100
      Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Ingo Molnar <mingo@kernel.org> - 2016-02-27 12:50 +0100
        Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Dave Hansen <dave@sr71.net> - 2016-02-27 20:20 +0100
          Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field "H. Peter Anvin" <hpa@zytor.com> - 2016-02-27 20:40 +0100
            Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Stephen Rothwell <sfr@canb.auug.org.au> - 2016-02-28 00:30 +0100
              [PATCH v2] signals, pkeys: make si_pkey 32 bits Stephen Rothwell <sfr@canb.auug.org.au> - 2016-02-28 00:50 +0100
                Re: [PATCH v2] signals, pkeys: make si_pkey 32 bits Ingo Molnar <mingo@kernel.org> - 2016-02-29 09:00 +0100
              Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Ingo Molnar <mingo@kernel.org> - 2016-02-29 09:10 +0100
                Re: [PATCH] x86, pkeys: fix siginfo ABI breakage from new field Stephen Rothwell <sfr@canb.auug.org.au> - 2016-03-01 00:00 +0100

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