linux-kernel - [PATCH 0/7] don't abuse task_struct.group

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Message-ID: <aTV1KYdcDGvjXHos@redhat.com>
Date: Sun, 7 Dec 2025 13:38:01 +0100
From: Oleg Nesterov <oleg@...hat.com>
To: Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Christian Brauner <brauner@...nel.org>,
	Carlos Llamas <cmllamas@...gle.com>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Felix Kuehling <Felix.Kuehling@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Rob Herring <robh@...nel.org>, Steven Price <steven.price@....com>,
	Adrián Larumbe <adrian.larumbe@...labora.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Liviu Dudau <liviu.dudau@....com>, Jason Gunthorpe <jgg@...pe.ca>,
	Leon Romanovsky <leon@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH 0/7] don't abuse task_struct.group_leader

Hello.

Untested but hopefully trivial, please review.

The patches do not depend on each other, this series just removes
the usage of ->group_leader when it is "obviously unnecessary".

I am going to move ->group_leader from task_struct to signal_struct
or at least add the new task_group_leader() helper. So I will send
more tree-wide changes on top of this series.

If this series passes the review, can it be routed via mm tree?

Oleg.
---
 drivers/android/binder.c                         |  9 ++++-----
 drivers/android/binder_alloc.c                   |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c           |  5 +----
 drivers/gpu/drm/amd/amdkfd/kfd_process.c         | 10 ----------
 drivers/gpu/drm/panfrost/panfrost_gem.c          |  2 +-
 drivers/gpu/drm/panthor/panthor_gem.c            |  2 +-
 drivers/infiniband/core/umem_odp.c               |  4 ++--
 net/core/netclassid_cgroup.c                     |  2 +-
 9 files changed, 12 insertions(+), 26 deletions(-)