linux-kernel - [PATCH 5.15.y 0/8] Backport patches for DAMON merge regions fix

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Message-Id: <20240716183333.138498-1-sj@kernel.org>
Date: Tue, 16 Jul 2024 11:33:25 -0700
From: SeongJae Park <sj@...nel.org>
To: stable@...r.kernel.org,
	gregkh@...uxfoundation.org
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>,
	Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	damon@...ts.linux.dev,
	linux-mm@...ck.org,
	linux-sparse@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5.15.y 0/8] Backport patches for DAMON merge regions fix

Commit 310d6c15e910 ("mm/damon/core: merge regions aggressively when
max_nr_regions") causes a build warning and a build failure [1] on
5.15.y.  Those are due to
1) unnecessarily strict type check from max(), and
2) use of not-yet-introduced damon_ctx->attrs field, respectively.

Fix the warning by backporting a minmax.h upstream commit that made the
type check less strict for unnecessary case, and upstream commits that
it depends on.

Note that all patches except the fourth one ("minmax: fix header
inclusions") are clean cherry-picks of upstream commit.  For the fourth
one, minor conflict resolving was needed.

Also, the last patch, which is the backport of the DAMON fix, was
cleanly cherry-picked, but added manual fix for the build failure.

[1] https://lore.kernel.org/2024071532-pebble-jailhouse-48b2@gregkh

Andy Shevchenko (1):
  minmax: fix header inclusions

Bart Van Assche (1):
  tracing: Define the is_signed_type() macro once

David Laight (3):
  minmax: allow min()/max()/clamp() if the arguments have the same
    signedness.
  minmax: allow comparisons of 'int' against 'unsigned char/short'
  minmax: relax check to allow comparison between unsigned arguments and
    signed constants

Jason A. Donenfeld (2):
  minmax: sanity check constant bounds when clamping
  minmax: clamp more efficiently by avoiding extra comparison

SeongJae Park (1):
  mm/damon/core: merge regions aggressively when max_nr_regions is unmet

 include/linux/compiler.h     |  6 +++
 include/linux/minmax.h       | 89 ++++++++++++++++++++++++++----------
 include/linux/overflow.h     |  1 -
 include/linux/trace_events.h |  2 -
 mm/damon/core.c              | 23 ++++++++--
 5 files changed, 90 insertions(+), 31 deletions(-)

base-commit: 4d1b7f1bf3858ed48a98c004bda5fdff2cdf13c8
-- 
2.39.2