Add __free() support to eventfd and update drm_syncobj to use it as an
example consumer.

A minor discrepancy I encountered is whether to put a semicolon after
DEFINE_FREE(). It seems some in-tree code does, some doesn't. In the end,
I followed the example set in core-api/cleanup.rst, and omitted it.

Signed-off-by: Bence Csokas <bence.csokas@arm.com>
---
Changes in v2:
- IS_ERR_OR_NULL() check, instead of NULLing out pointer on IS_ERR
- Link to v1: https://patch.msgid.link/20260909-efd-autofree-v1-0-c6c3c19cc702@arm.com

To: Alexander Viro <viro@zeniv.linux.org.uk>
To: Christian Brauner <brauner@kernel.org>
To: Jan Kara <jack@suse.cz>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
To: Maxime Ripard <mripard@kernel.org>
To: Thomas Zimmermann <tzimmermann@suse.de>
To: David Airlie <airlied@gmail.com>
To: Simona Vetter <simona@ffwll.ch>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org

---
Bence Csokas (2):
      eventfd: Add scope-based cleanup capability
      drm/syncobj: Use scope-based cleanup for eventfd_ctx

 drivers/gpu/drm/drm_syncobj.c | 8 +++-----
 fs/eventfd.c                  | 3 +++
 include/linux/eventfd.h       | 3 +++
 3 files changed, 9 insertions(+), 5 deletions(-)
---
base-commit: 587858367581b9c55c3690f4e63382ad622719d4
change-id: 20260826-efd-autofree-766608e8d8aa

Best regards,
--  
Bence Csokas <bence.csokas@arm.com>