linux-kernel - [PATCH 0/2] stddef: Simplify TRAILING

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Message-ID: <cover.1757672423.git.u.kleine-koenig@baylibre.com>
Date: Fri, 12 Sep 2025 12:28:00 +0200
From: Uwe Kleine-König <u.kleine-koenig@...libre.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Kees Cook <kees@...nel.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] stddef: Simplify TRAILING_OVERLAP() and improve docs

Hello,

as a follup to the discussion I had with Gustavo in reply to
https://lore.kernel.org/linux-pwm/aJtRPZpc-Lv-C6zD@kspp here comes my
suggestion to improve TRAILING_OVERLAP() for wider audience.

While working at it, I wonder if __packed should also better be part of the
macro to ensure that


	struct myfamstruct {
		char c;
		char payload[];
	};

	TRAILING_OVERLAP(struct myfamstruct, mfs, payload,
		unsigned int payload_as_int;
	) fs;

does the right thing. This however is orthogonal and better discussed
separately from this patch set.

Best regards
Uwe

Uwe Kleine-König (2):
  stddef: Add a comment about why TRAILING_OVERLAP() exists
  stddef: Stop using FAM parameter of TRAILING_OVERLAP()

 include/linux/stddef.h | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)


base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
-- 
2.50.1