linux-kernel - [PATCH v3 0/4] drm: Use full allocated minor range for DRM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220906140117.409852-1-michal.winiarski@intel.com>
Date:   Tue, 6 Sep 2022 16:01:13 +0200
From:   Michał Winiarski <michal.winiarski@...el.com>
To:     <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Simon Ser <contact@...rsion.fr>,
        Matthew Wilcox <willy@...radead.org>,
        Michał Winiarski <michal.winiarski@...el.com>
Subject: [PATCH v3 0/4] drm: Use full allocated minor range for DRM

64 DRM device nodes is not enough for everyone.
Upgrade it to ~512K (which definitely is more than enough).

To allow testing userspace support for >64 devices, add additional DRM
modparam (skip_legacy_minors) which causes DRM to skip allocating minors
in 0-192 range.
Additionally - one minor tweak around minor DRM IDR locking and IDR lockdep
annotations.

v1 -> v2:
Don't touch DRM_MINOR_CONTROL and its range (Simon Ser)

v2 -> v3:
Don't use legacy scheme for >=192 minor range (Dave Airlie)
Add modparam for testing (Dave Airlie)
Add lockdep annotation for IDR (Daniel Vetter)

Michał Winiarski (4):
  drm: Expand max DRM device number to full MINORBITS
  drm: Introduce skip_legacy_minors modparam
  drm: Use mutex for minors
  idr: Add might_alloc() annotation

 drivers/gpu/drm/drm_drv.c | 55 ++++++++++++++++++++++-----------------
 lib/radix-tree.c          |  3 +++
 2 files changed, 34 insertions(+), 24 deletions(-)

-- 
2.37.3