From: Arnd Bergmann <arnd@arndb.de>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Andrew Morton <akpm@linux-foundation.org>,
"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
Helge Deller <deller@gmx.de>, Arnd Bergmann <arnd@arndb.de>,
Kees Cook <keescook@chromium.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
linux-ia64@vger.kernel.org,
Parisc List <linux-parisc@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>
Subject: Re: [PATCH v1 01/10] powerpc: Move 'struct ppc64_opd_entry' back into asm/elf.h
Date: Tue, 12 Oct 2021 10:02:03 +0200 [thread overview]
Message-ID: <CAK8P3a09azJ0fshthGeOqK92uaYJ+m39Yg1=YQav=n9n_PNt5w@mail.gmail.com> (raw)
In-Reply-To: <878ryy7m6v.fsf@mpe.ellerman.id.au>
On Tue, Oct 12, 2021 at 9:10 AM Michael Ellerman <mpe@ellerman.id.au> wrote:
> Christophe Leroy <christophe.leroy@csgroup.eu> writes:
> > 'struct ppc64_opd_entry' doesn't belong to uapi/asm/elf.h
> > But it was by mistake added outside of __KERNEL__ section,
> > therefore commit c3617f72036c ("UAPI: (Scripted) Disintegrate
> > arch/powerpc/include/asm") moved it to uapi/asm/elf.h
>
> ... it's been visible to userspace since the first commit moved it, ~13
> years ago in 2008, v2.6.27.
>
> > Move it back into asm/elf.h, this brings it back in line with
> > IA64 and PARISC architectures.
>
> Removing it from the uapi header risks breaking userspace, I doubt
> anything uses it, but who knows.
>
> Given how long it's been there I think it's a bit risky to remove it :/
I would not be too worried about it. While we should absolutely
never break existing binaries, changing the visibility of internal
structures in header files only breaks compiling applications
that do rely on these entries, and they really should not be using
this in the first place.
Arnd
next prev parent reply other threads:[~2021-10-12 8:04 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-11 15:25 [PATCH v1 00/10] Fix LKDTM for PPC64/IA64/PARISC Christophe Leroy
2021-10-11 15:25 ` [PATCH v1 01/10] powerpc: Move 'struct ppc64_opd_entry' back into asm/elf.h Christophe Leroy
2021-10-12 7:10 ` Michael Ellerman
2021-10-12 8:02 ` Arnd Bergmann [this message]
2021-10-13 6:59 ` Kees Cook
2021-10-11 15:25 ` [PATCH v1 02/10] powerpc: Rename 'funcaddr' to 'addr' in 'struct ppc64_opd_entry' Christophe Leroy
2021-10-13 6:59 ` Kees Cook
2021-10-11 15:25 ` [PATCH v1 03/10] ia64: Rename 'ip' to 'addr' in 'struct fdesc' Christophe Leroy
2021-10-13 6:59 ` Kees Cook
2021-10-11 15:25 ` [PATCH v1 04/10] asm-generic: Use HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR to define associated stubs Christophe Leroy
2021-10-12 6:02 ` Helge Deller
2021-10-12 6:11 ` Christophe Leroy
2021-10-12 6:48 ` Helge Deller
2021-10-13 7:00 ` Kees Cook
2021-10-14 7:20 ` Christophe Leroy
2021-10-11 15:25 ` [PATCH v1 05/10] asm-generic: Define 'funct_descr_t' to commonly describe function descriptors Christophe Leroy
2021-10-13 7:01 ` Kees Cook
2021-10-13 7:23 ` Christophe Leroy
2021-10-13 7:27 ` Kees Cook
2021-10-11 15:25 ` [PATCH v1 06/10] asm-generic: Refactor dereference_[kernel]_function_descriptor() Christophe Leroy
2021-10-13 7:02 ` Kees Cook
2021-10-13 11:20 ` Christophe Leroy
2021-10-13 11:34 ` Arnd Bergmann
2021-10-11 15:25 ` [PATCH v1 07/10] lkdtm: Force do_nothing() out of line Christophe Leroy
2021-10-13 7:02 ` Kees Cook
2021-10-11 15:25 ` [PATCH v1 08/10] lkdtm: Really write into kernel text in WRITE_KERN Christophe Leroy
2021-10-13 7:05 ` Kees Cook
2021-10-13 7:29 ` Christophe Leroy
2021-10-11 15:25 ` [PATCH v1 09/10] lkdtm: Fix lkdtm_EXEC_RODATA() Christophe Leroy
2021-10-13 7:09 ` Kees Cook
2021-10-13 7:35 ` Christophe Leroy
2021-10-13 7:23 ` Kees Cook
2021-10-13 7:39 ` Christophe Leroy
2021-10-13 7:48 ` Christophe Leroy
2021-10-13 12:45 ` Christophe Leroy
2021-10-11 15:25 ` [PATCH v1 10/10] lkdtm: Fix execute_[user]_location() Christophe Leroy
2021-10-13 7:16 ` Kees Cook
2021-10-13 12:00 ` Christophe Leroy
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