linux-kernel - [PATCH 0/7 6.12.y] Backport minmax.h updates from v6.17-rc7

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Message-ID: <20250922103123.14538-1-farbere@amazon.com>
Date: Mon, 22 Sep 2025 10:31:16 +0000
From: Eliav Farber <farbere@...zon.com>
To: <farbere@...zon.com>, <akpm@...ux-foundation.org>,
	<David.Laight@...LAB.COM>, <arnd@...nel.org>, <linux-kernel@...r.kernel.org>,
	<stable@...r.kernel.org>
Subject: [PATCH 0/7 6.12.y] Backport minmax.h updates from v6.17-rc7

This series backports 7 patches to update minmax.h in the 6.12.y branch,
aligning it with v6.17-rc7.

The ultimate goal is to synchronize all longterm branches so that they
include the full set of minmax.h changes.

The key motivation is to bring in commit d03eba99f5bf ("minmax: allow
min()/max()/clamp() if the arguments have the same signedness"), which
is missing in older kernels.

In mainline, this change enables min()/max()/clamp() to accept mixed
argument types, provided both have the same signedness. Without it,
backported patches that use these forms may trigger compiler warnings,
which escalate to build failures when -Werror is enabled.

David Laight (7):
  minmax.h: add whitespace around operators and after commas
  minmax.h: update some comments
  minmax.h: reduce the #define expansion of min(), max() and clamp()
  minmax.h: use BUILD_BUG_ON_MSG() for the lo < hi test in clamp()
  minmax.h: move all the clamp() definitions after the min/max() ones
  minmax.h: simplify the variants of clamp()
  minmax.h: remove some #defines that are only expanded once

 include/linux/minmax.h | 205 +++++++++++++++++++----------------------
 1 file changed, 95 insertions(+), 110 deletions(-)

-- 
2.47.3