From nobody Sun Nov 24 12:26:09 2024 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [217.70.183.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63A1B1D278C for ; Wed, 6 Nov 2024 10:48:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730890128; cv=none; b=nQHZcGp3rWstURUjOksjLUr4UfAhu8v4tFUMkz620PqULf/EfRilLaU8NFK/t+riDDv2iqL5uMpI6cMSrvDbb4AqfzVUlCYcn07emigmM2cfisRSJ4Fwfzwdz8EbLvoX2UxA1vu0jTtOb9R875lEroXURpOrLF4T90TV7sYUW2I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730890128; c=relaxed/simple; bh=4binOEGfu3XAPZLpw+QDubNdxl5QHjAjAsV26Hkdbos=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=fccBmJS8iVV2mOr+piGkBYKbhUS0+bFKEaNuh5Ap5VjhaO0ASPu20j/5c3iDaHejE94OTlPGATS6bYLwiMIF75FvGIDiZG596RVERWSXij2uLPUKqp5wOR6JyuH/qvANbgnj3g48uPWW2n1hBDn8vLy9tJhx9ESFLXXpLzpiewc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=Fl1PBQ8v; arc=none smtp.client-ip=217.70.183.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="Fl1PBQ8v" Received: by mail.gandi.net (Postfix) with ESMTPSA id B00336000E; Wed, 6 Nov 2024 10:48:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1730890124; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6pRM5jscZII9GohdxbWbdZ5ZoYRQpxbmot/dqfyy/mM=; b=Fl1PBQ8vf8xbrbvYM3xWTxSpEI3DdCvhNIBTbOYp6R+eDrsVaCDOKt0Jox0oPfimU1B9YA pHfLSpEqovaIxofsgJhE/kStmQesRRrZ0t/Pkptx6G3Uw4xLiTPe0CXzwD4C7H0dsR7/Y6 qi89zz5Y3iHIs+mDjaicJW1eeYQeGDzVj7hbBvDspF6VZg5nuR5TEksv97XYsCvG7n3yXd qTicJU3CcnPNi6EO8gP0kxj9vMtjnTdTJ/YtBcGqYe8jJTyMdO+/L/d71J8lmwKWod57eL ANYApORKl9n8h07Ab2yZpYzTsbZBgcDUvkwCqzdpiYbM9ClTo6iBsepwJHBi4Q== From: Luca Ceresoli Date: Wed, 06 Nov 2024 11:48:26 +0100 Subject: [PATCH v2 3/4] drm/mode_object: add drm_mode_object_read_refcount() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241106-drm-small-improvements-v2-3-f6e2aef86719@bootlin.com> References: <20241106-drm-small-improvements-v2-0-f6e2aef86719@bootlin.com> In-Reply-To: <20241106-drm-small-improvements-v2-0-f6e2aef86719@bootlin.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Luca Ceresoli X-Mailer: b4 0.14.2 X-GND-Sasl: luca.ceresoli@bootlin.com Add a wrapper to kref_read() just like the ones already in place for kref_get() and kref_put(). This will be used for sanity checks on object lifetime. Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/drm_mode_object.c | 20 ++++++++++++++++++++ include/drm/drm_mode_object.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_o= bject.c index df4cc0e8e263d5887a799cf1a61d998234be7158..f990cc7e9b5d3bda34531235933= 14fa1ea2bf923 100644 --- a/drivers/gpu/drm/drm_mode_object.c +++ b/drivers/gpu/drm/drm_mode_object.c @@ -217,6 +217,26 @@ void drm_mode_object_get(struct drm_mode_object *obj) } EXPORT_SYMBOL(drm_mode_object_get); =20 +/** + * drm_mode_object_get - read the refcount for a mode object + * @obj: DRM mode object + * + * This function returns the current object's refcount if it is a + * refcounted modeset object, or 0 on any other object. + */ +unsigned int drm_mode_object_read_refcount(struct drm_mode_object *obj) +{ + unsigned int refcount =3D 0; + + if (obj->free_cb) { + refcount =3D kref_read(&obj->refcount); + DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, refcount); + } + + return refcount; +} +EXPORT_SYMBOL(drm_mode_object_read_refcount); + /** * drm_object_attach_property - attach a property to a modeset object * @obj: drm modeset object diff --git a/include/drm/drm_mode_object.h b/include/drm/drm_mode_object.h index c68edbd126d04d51221f50aa2b4166475543b59f..3d2c739e703888bf4520c61594d= 480f128d50e56 100644 --- a/include/drm/drm_mode_object.h +++ b/include/drm/drm_mode_object.h @@ -123,6 +123,7 @@ struct drm_mode_object *drm_mode_object_find(struct drm= _device *dev, uint32_t id, uint32_t type); void drm_mode_object_get(struct drm_mode_object *obj); void drm_mode_object_put(struct drm_mode_object *obj); +unsigned int drm_mode_object_read_refcount(struct drm_mode_object *obj); =20 int drm_object_property_set_value(struct drm_mode_object *obj, struct drm_property *property, --=20 2.34.1