From: "Arnd Bergmann" <arnd@arndb.de>
To: "Geert Uytterhoeven" <geert@linux-m68k.org>
Cc: "Russell King" <linux@armlinux.org.uk>,
"Christian Schrefl" <chrisi.schrefl@gmail.com>,
"Miguel Ojeda" <miguel.ojeda.sandonis@gmail.com>,
"Alice Ryhl" <aliceryhl@google.com>,
"Ard Biesheuvel" <ardb@kernel.org>,
"Jamie Cunliffe" <Jamie.Cunliffe@arm.com>,
"Will Deacon" <will@kernel.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
acourbot@nvidia.com, "Andrew Morton" <akpm@linux-foundation.org>,
"Anton Ivanov" <anton.ivanov@cambridgegreys.com>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"David Gow" <david@davidgow.net>, "Gary Guo" <gary@garyguo.net>,
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"Richard Weinberger" <richard@nod.at>,
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"Trevor Gross" <tmgross@umich.edu>,
"Uladzislau Rezki (Sony)" <urezki@gmail.com>,
"John Paul Adrian Glaubitz" <glaubitz@physik.fu-berlin.de>
Subject: Re: [PATCH v2 0/3] Inline helpers into Rust without full LTO
Date: Fri, 27 Mar 2026 14:41:41 +0100 [thread overview]
Message-ID: <1990bf45-050a-445d-bcea-16d225207531@app.fastmail.com> (raw)
In-Reply-To: <93439e91-cf81-477b-b880-a813bb01ad7c@app.fastmail.com>
On Fri, Mar 27, 2026, at 10:02, Arnd Bergmann wrote:
> On Fri, Mar 27, 2026, at 08:56, Geert Uytterhoeven wrote:
> but that only allowed bitfields to be marked as __attribute__((packed))
> in order to get tightly packed fields and return '4' on all architectures,
> while m68k-linux-gcc apparently has all bitfields implicitly packed unless they
> are explicitly marked __attribute__((aligned(x))). This behavior is
> independent of the -malign-int flag.
I had another look and found that this has been in gcc since ELF
support was originally added for m68k:
gcc/config/m68k/linux.h:#undef PCC_BITFIELD_TYPE_MATTERS
All other current Linux/ELF targets get the default from gcc/config/elfos.h
Arnd
next prev parent reply other threads:[~2026-03-27 13:42 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-03 11:34 Alice Ryhl
2026-02-03 11:34 ` [PATCH v2 1/3] kbuild: rust: add `CONFIG_RUSTC_CLANG_LLVM_COMPATIBLE` Alice Ryhl
2026-02-03 11:49 ` Will Deacon
2026-02-03 12:02 ` Alice Ryhl
2026-03-05 10:12 ` Nicolas Schier
2026-03-05 10:51 ` Alice Ryhl
2026-03-14 0:26 ` Nathan Chancellor
2026-02-03 11:34 ` [PATCH v2 2/3] rust: helpers: #define __rust_helper Alice Ryhl
2026-03-14 0:28 ` Nathan Chancellor
2026-02-03 11:34 ` [PATCH v2 3/3] build: rust: provide an option to inline C helpers into Rust Alice Ryhl
2026-03-06 17:32 ` Alice Ryhl
2026-03-14 0:40 ` Nathan Chancellor
2026-03-14 11:22 ` Alice Ryhl
2026-03-16 21:34 ` Nathan Chancellor
2026-03-17 8:02 ` Miguel Ojeda
2026-03-14 0:34 ` Nathan Chancellor
2026-03-17 8:25 ` [PATCH v2 0/3] Inline helpers into Rust without full LTO Andreas Hindborg
2026-03-22 19:21 ` Miguel Ojeda
2026-03-22 19:38 ` Miguel Ojeda
2026-03-23 13:54 ` Mark Brown
2026-03-23 14:53 ` Miguel Ojeda
2026-03-22 19:46 ` Miguel Ojeda
2026-03-23 8:49 ` Marek Szyprowski
2026-03-25 1:58 ` Miguel Ojeda
2026-03-26 21:12 ` Arnd Bergmann
2026-03-27 8:02 ` Miguel Ojeda
2026-03-27 8:16 ` Marek Szyprowski
2026-03-23 0:03 ` Miguel Ojeda
2026-03-23 3:04 ` Andrew Lunn
2026-03-23 3:24 ` Miguel Ojeda
2026-03-23 12:54 ` Andrew Lunn
2026-03-23 13:13 ` Gary Guo
2026-03-23 13:28 ` Andrew Lunn
2026-03-23 13:34 ` Miguel Ojeda
2026-03-23 14:39 ` Alice Ryhl
2026-03-23 13:14 ` Miguel Ojeda
2026-03-23 10:03 ` Russell King (Oracle)
2026-03-23 13:26 ` Miguel Ojeda
2026-03-26 10:10 ` Alice Ryhl
2026-03-26 13:47 ` Miguel Ojeda
2026-03-26 14:31 ` Christian Schrefl
2026-03-26 15:18 ` Russell King (Oracle)
2026-03-26 17:30 ` Miguel Ojeda
2026-03-30 21:09 ` Christian Schrefl
2026-03-31 11:44 ` Arnd Bergmann
2026-03-26 21:33 ` Arnd Bergmann
2026-03-27 7:56 ` Geert Uytterhoeven
2026-03-27 9:02 ` Arnd Bergmann
2026-03-27 13:41 ` Arnd Bergmann [this message]
2026-03-30 12:03 ` Geert Uytterhoeven
2026-03-30 12:13 ` Arnd Bergmann
2026-03-30 12:17 ` Geert Uytterhoeven
2026-03-26 17:31 ` Miguel Ojeda
2026-03-26 2:42 ` Nathan Chancellor
2026-03-26 17:13 ` Miguel Ojeda
2026-03-26 5:34 ` David Gow
2026-03-29 17:33 ` Miguel Ojeda
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