linux-kernel - [PATCH 0/2] Restore and fix SCHED_WARN

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Message-ID: <20251028165059.682306-1-bvanassche@acm.org>
Date: Tue, 28 Oct 2025 09:50:56 -0700
From: Bart Van Assche <bvanassche@....org>
To: Ingo Molnar <mingo@...hat.com>
Cc: linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Bart Van Assche <bvanassche@....org>
Subject: [PATCH 0/2] Restore and fix SCHED_WARN_ON()

Hi Ingo,

Using WARN_ON_ONCE() or any other code that calls console_lock() from the
process scheduler may trigger lock inversion. This patch series fixes this
by restoring the SCHED_WARN_ON() macro and by changing its implementation.

Please consider this patch series for the next merge window.

Thanks,

Bart.

Bart Van Assche (2):
  Revert "sched/debug: Change SCHED_WARN_ON() to WARN_ON_ONCE()"
  Fix SCHED_WARN_ON()

 kernel/sched/core.c       | 22 ++++++++--------
 kernel/sched/core_sched.c |  2 +-
 kernel/sched/deadline.c   | 12 ++++-----
 kernel/sched/ext.c        |  2 +-
 kernel/sched/fair.c       | 54 +++++++++++++++++++--------------------
 kernel/sched/rt.c         |  2 +-
 kernel/sched/sched.h      | 26 +++++++++++++++----
 kernel/sched/stats.h      |  2 +-
 8 files changed, 69 insertions(+), 53 deletions(-)