linux-kernel - [PATCH v3 0/4] fbdev: Make CONFIG_FB

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: <20251230052827.4676-1-chintanlike@gmail.com>
Date: Mon, 29 Dec 2025 21:28:18 -0800
From: Chintan Patel <chintanlike@...il.com>
To: linux-fbdev@...r.kernel.org,
	linux-staging@...ts.linux.dev,
	linux-omap@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	tzimmermann@...e.de,
	andy@...nel.org,
	deller@....de,
	gregkh@...uxfoundation.org,
	Chintan Patel <chintanlike@...il.com>
Subject: [PATCH v3 0/4] fbdev: Make CONFIG_FB_DEVICE optional for drivers

This series makes CONFIG_FB_DEVICE optional for fbdev drivers that use
it only for sysfs interfaces, addressing Thomas Zimmermann’s TODO to
remove hard FB_DEVICE dependencies.

The series introduces a small helper, dev_of_fbinfo(), which returns
NULL when CONFIG_FB_DEVICE=n. This allows sysfs code paths to be skipped
via runtime checks, avoids #ifdef CONFIG_FB_DEVICE clutter, and keeps
full compile-time syntax checking.

Signed-off-by: Chintan Patel <chintanlike@...il.com>
---
Changes in v3:
- Use PTR_IF() to conditionally include overlay_sysfs_group in 
  overlay_sysfs_groups
- Decouple variable definition and assignment in fbtft_sysfs_init/exit

Changes in v2:
- Add dev_of_fbinfo() helper (suggested by Geert Uytterhoeven)
- Replace #ifdef CONFIG_FB_DEVICE blocks with runtime NULL checks
- Switch to fb_dbg() / fb_info() logging (suggested by Thomas Zimmermann)

---

Chintan Patel (4):
  fb: Add dev_of_fbinfo() helper for optional sysfs support
  staging: fbtft: Make FB_DEVICE dependency optional
  fbdev: omapfb: Make FB_DEVICE dependency optional
  fbdev: sh_mobile_lcdc: Make FB_DEVICE dependency optional

 drivers/staging/fbtft/Kconfig                 |  5 ++++-
 drivers/staging/fbtft/fbtft-sysfs.c           | 20 +++++++++++++++----
 drivers/video/fbdev/omap2/omapfb/Kconfig      |  3 ++-
 .../video/fbdev/omap2/omapfb/omapfb-sysfs.c   | 16 +++++++++++----
 drivers/video/fbdev/sh_mobile_lcdcfb.c        | 12 ++++++++++-
 include/linux/fb.h                            |  9 +++++++++
 6 files changed, 54 insertions(+), 11 deletions(-)

-- 
2.43.0