From nobody Sat Feb 7 21:11:04 2026 Received: from mx.treblig.org (mx.treblig.org [46.235.229.95]) (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 979561C84DF; Thu, 24 Apr 2025 14:28:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=46.235.229.95 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745504884; cv=none; b=kgdXrsG2pGIYh8+lv+SbEjqWfQE2UQZmY8TNs56ef5cMmhC7VmJUf2GGjN98/8Hl/tJljBgJbTu949X5/+tZtF6rqbmPO8g3NrkpaFVaHHi26YkyBgtGyVu/bXgcGFMcjugiPGD+cupG2VIMK3pvmfrguFB4IcgBq9odf7VmjVM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745504884; c=relaxed/simple; bh=5eneIEPCdB83u8+BEhtmTgT1YL8I248r9AioANb2tNc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WqaOe9JjYZRKDlZoJcUY59Hr9mImL7C6yAk2g1Vu1HaWDILODnFNb1fQ+02lO3HB+oe/3/lBprfANUxW6VLdXtSyeZBRm1WUwFg0W67Gjj3O8SHTC+BSvXxA8N0pH5zc2TZcF1LhKWJPb9VOyeqnmctEZaSHfnveDk1DV2dKqws= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=treblig.org; spf=pass smtp.mailfrom=treblig.org; dkim=pass (2048-bit key) header.d=treblig.org header.i=@treblig.org header.b=qqtaRYg6; arc=none smtp.client-ip=46.235.229.95 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=treblig.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=treblig.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=treblig.org header.i=@treblig.org header.b="qqtaRYg6" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=treblig.org ; s=bytemarkmx; h=MIME-Version:Message-ID:Date:Subject:From:Content-Type:From :Subject; bh=C8ixYIeM5DXpPc0p7oUirQcwqBIWEQe7FnFZNeRD93w=; b=qqtaRYg6apxGJxbQ 0JmikwTiOse/PxO+eo5ed7VGM23RDss8bJVE4GbH/Ktz4Fk5gnedQMyVR54fov8UvnxRsIRvBx2T8 bPS/23Cdy60HnDe45dvh1eddCd9szF8V2Q/FwHIhl7Dp5W92eeDrcM88EjrLm+CoSWor3EUgWZmvr kdUESpaxFYTxjj0lY6r+9N+e3YJhhGVelDKJOhXWgJURN0lJPys7OAy97steN7gEOMpbuDZot2sF/ 6k1vXRL8dc7kQsKmf3EIGYFEC2ihpHD6aHoFV1ZfGPpxjDxMvmkWRDGnfT1VgSIfTqU57ncWiWKsq gHJdx5xl4Xw7PoEzsA==; Received: from localhost ([127.0.0.1] helo=dalek.home.treblig.org) by mx.treblig.org with esmtp (Exim 4.96) (envelope-from ) id 1u7xYJ-00DdIX-1G; Thu, 24 Apr 2025 14:27:47 +0000 From: linux@treblig.org To: arnaud.pouliquen@foss.st.com, andersson@kernel.org, mathieu.poirier@linaro.org Cc: corbet@lwn.net, linux-remoteproc@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, "Dr. David Alan Gilbert" Subject: [PATCH v2 1/3] rpmsg: core: Remove deadcode Date: Thu, 24 Apr 2025 15:27:44 +0100 Message-ID: <20250424142746.79062-2-linux@treblig.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250424142746.79062-1-linux@treblig.org> References: <20250424142746.79062-1-linux@treblig.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" rpmsg_send_offchannel() and rpmsg_trysend_offchannel() have been unused since they were added in 2011's commit bcabbccabffe ("rpmsg: add virtio-based remote processor messaging bus") Remove them and associated docs. Signed-off-by: Dr. David Alan Gilbert --- Documentation/staging/rpmsg.rst | 46 ------------------------ drivers/rpmsg/rpmsg_core.c | 63 --------------------------------- include/linux/rpmsg.h | 22 ------------ 3 files changed, 131 deletions(-) diff --git a/Documentation/staging/rpmsg.rst b/Documentation/staging/rpmsg.= rst index 3713adaa1608..40282cca86ca 100644 --- a/Documentation/staging/rpmsg.rst +++ b/Documentation/staging/rpmsg.rst @@ -110,31 +110,6 @@ or a timeout of 15 seconds elapses. When the latter ha= ppens, The function can only be called from a process context (for now). Returns 0 on success and an appropriate error value on failure. =20 -:: - - int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len); - - -sends a message across to the remote processor, using the src and dst -addresses provided by the user. - -The caller should specify the endpoint, the data it wants to send, -its length (in bytes), and explicit source and destination addresses. -The message will then be sent to the remote processor to which the -endpoint's channel belongs, but the endpoint's src and channel dst -addresses will be ignored (and the user-provided addresses will -be used instead). - -In case there are no TX buffers available, the function will block until -one becomes available (i.e. until the remote processor consumes -a tx buffer and puts it back on virtio's used descriptor ring), -or a timeout of 15 seconds elapses. When the latter happens, --ERESTARTSYS is returned. - -The function can only be called from a process context (for now). -Returns 0 on success and an appropriate error value on failure. - :: =20 int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len); @@ -173,27 +148,6 @@ return -ENOMEM without waiting until one becomes avail= able. The function can only be called from a process context (for now). Returns 0 on success and an appropriate error value on failure. =20 -:: - - int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 ds= t, - void *data, int len); - - -sends a message across to the remote processor, using source and -destination addresses provided by the user. - -The user should specify the channel, the data it wants to send, -its length (in bytes), and explicit source and destination addresses. -The message will then be sent to the remote processor to which the -channel belongs, but the channel's src and dst addresses will be -ignored (and the user-provided addresses will be used instead). - -In case there are no TX buffers available, the function will immediately -return -ENOMEM without waiting until one becomes available. - -The function can only be called from a process context (for now). -Returns 0 on success and an appropriate error value on failure. - :: =20 struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *rpdev, diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c index 207b64c0a2fe..6ee36adcbdba 100644 --- a/drivers/rpmsg/rpmsg_core.c +++ b/drivers/rpmsg/rpmsg_core.c @@ -193,38 +193,6 @@ int rpmsg_sendto(struct rpmsg_endpoint *ept, void *dat= a, int len, u32 dst) } EXPORT_SYMBOL(rpmsg_sendto); =20 -/** - * rpmsg_send_offchannel() - send a message using explicit src/dst address= es - * @ept: the rpmsg endpoint - * @src: source address - * @dst: destination address - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len to the remote @dst address, - * and uses @src as the source address. - * The message will be sent to the remote processor which the @ept - * endpoint belongs to. - * In case there are no TX buffers available, the function will block until - * one becomes available, or a timeout of 15 seconds elapses. When the lat= ter - * happens, -ERESTARTSYS is returned. - * - * Can only be called from process context (for now). - * - * Return: 0 on success and an appropriate error value on failure. - */ -int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len) -{ - if (WARN_ON(!ept)) - return -EINVAL; - if (!ept->ops->send_offchannel) - return -ENXIO; - - return ept->ops->send_offchannel(ept, src, dst, data, len); -} -EXPORT_SYMBOL(rpmsg_send_offchannel); - /** * rpmsg_trysend() - send a message across to the remote processor * @ept: the rpmsg endpoint @@ -301,37 +269,6 @@ __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct= file *filp, } EXPORT_SYMBOL(rpmsg_poll); =20 -/** - * rpmsg_trysend_offchannel() - send a message using explicit src/dst addr= esses - * @ept: the rpmsg endpoint - * @src: source address - * @dst: destination address - * @data: payload of message - * @len: length of payload - * - * This function sends @data of length @len to the remote @dst address, - * and uses @src as the source address. - * The message will be sent to the remote processor which the @ept - * endpoint belongs to. - * In case there are no TX buffers available, the function will immediately - * return -ENOMEM without waiting until one becomes available. - * - * Can only be called from process context (for now). - * - * Return: 0 on success and an appropriate error value on failure. - */ -int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len) -{ - if (WARN_ON(!ept)) - return -EINVAL; - if (!ept->ops->trysend_offchannel) - return -ENXIO; - - return ept->ops->trysend_offchannel(ept, src, dst, data, len); -} -EXPORT_SYMBOL(rpmsg_trysend_offchannel); - /** * rpmsg_set_flow_control() - request remote to pause/resume transmission * @ept: the rpmsg endpoint diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index 90d8e4475f80..fb7ab9165645 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -184,13 +184,9 @@ struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_d= evice *, =20 int rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len); int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); -int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len); =20 int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len); int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 d= st); -int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len); =20 __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp, poll_table *wait); @@ -271,15 +267,6 @@ static inline int rpmsg_sendto(struct rpmsg_endpoint *= ept, void *data, int len, =20 } =20 -static inline int rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 sr= c, - u32 dst, void *data, int len) -{ - /* This shouldn't be possible */ - WARN_ON(1); - - return -ENXIO; -} - static inline int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, in= t len) { /* This shouldn't be possible */ @@ -297,15 +284,6 @@ static inline int rpmsg_trysendto(struct rpmsg_endpoin= t *ept, void *data, return -ENXIO; } =20 -static inline int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32= src, - u32 dst, void *data, int len) -{ - /* This shouldn't be possible */ - WARN_ON(1); - - return -ENXIO; -} - static inline __poll_t rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp, poll_table *wait) { --=20 2.49.0 From nobody Sat Feb 7 21:11:04 2026 Received: from mx.treblig.org (mx.treblig.org [46.235.229.95]) (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 37CA42857DB; 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Thu, 24 Apr 2025 14:27:47 +0000 From: linux@treblig.org To: arnaud.pouliquen@foss.st.com, andersson@kernel.org, mathieu.poirier@linaro.org Cc: corbet@lwn.net, linux-remoteproc@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, "Dr. David Alan Gilbert" Subject: [PATCH v2 2/3] rpmsg: virtio: Remove uncallable offchannel functions Date: Thu, 24 Apr 2025 15:27:45 +0100 Message-ID: <20250424142746.79062-3-linux@treblig.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250424142746.79062-1-linux@treblig.org> References: <20250424142746.79062-1-linux@treblig.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Dr. David Alan Gilbert" The virtio_rpmsg_send_offchannel() and virtio_rpmsg_trysend_offchannel() are wired up to the send_offchannel and trysend_offchannel members of rpmsg_endpoint_ops, the only dereference of those was by the unused, and now removed rpmsg_send_offchannel() and rpmsg_trysend_offchannel() functions. Remove them. Signed-off-by: Dr. David Alan Gilbert --- drivers/rpmsg/virtio_rpmsg_bus.c | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_= bus.c index 89d7a3b8c48b..1474e8000207 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -141,13 +141,9 @@ static void virtio_rpmsg_destroy_ept(struct rpmsg_endp= oint *ept); static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int l= en); static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int= len, u32 dst); -static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 sr= c, - u32 dst, void *data, int len); static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, in= t len); static int virtio_rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); -static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32= src, - u32 dst, void *data, int len); static ssize_t virtio_rpmsg_get_mtu(struct rpmsg_endpoint *ept); static struct rpmsg_device *__rpmsg_create_channel(struct virtproc_info *v= rp, struct rpmsg_channel_info *chinfo); @@ -156,10 +152,8 @@ static const struct rpmsg_endpoint_ops virtio_endpoint= _ops =3D { .destroy_ept =3D virtio_rpmsg_destroy_ept, .send =3D virtio_rpmsg_send, .sendto =3D virtio_rpmsg_sendto, - .send_offchannel =3D virtio_rpmsg_send_offchannel, .trysend =3D virtio_rpmsg_trysend, .trysendto =3D virtio_rpmsg_trysendto, - .trysend_offchannel =3D virtio_rpmsg_trysend_offchannel, .get_mtu =3D virtio_rpmsg_get_mtu, }; =20 @@ -665,14 +659,6 @@ static int virtio_rpmsg_sendto(struct rpmsg_endpoint *= ept, void *data, int len, return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true); } =20 -static int virtio_rpmsg_send_offchannel(struct rpmsg_endpoint *ept, u32 sr= c, - u32 dst, void *data, int len) -{ - struct rpmsg_device *rpdev =3D ept->rpdev; - - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, true); -} - static int virtio_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, in= t len) { struct rpmsg_device *rpdev =3D ept->rpdev; @@ -690,14 +676,6 @@ static int virtio_rpmsg_trysendto(struct rpmsg_endpoin= t *ept, void *data, return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false); } =20 -static int virtio_rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32= src, - u32 dst, void *data, int len) -{ - struct rpmsg_device *rpdev =3D ept->rpdev; - - return rpmsg_send_offchannel_raw(rpdev, src, dst, data, len, false); -} - static ssize_t virtio_rpmsg_get_mtu(struct rpmsg_endpoint *ept) { struct rpmsg_device *rpdev =3D ept->rpdev; --=20 2.49.0 From nobody Sat Feb 7 21:11:04 2026 Received: from mx.treblig.org (mx.treblig.org [46.235.229.95]) (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 4A9C2200B99; Thu, 24 Apr 2025 14:28:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" From: "Dr. David Alan Gilbert" After the previous patch, there are no implementers of the send_offchannel() and trysend_offchannel() methods. Remove them. Signed-off-by: Dr. David Alan Gilbert --- drivers/rpmsg/rpmsg_internal.h | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 42c7007be1b5..397e4926bd02 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -50,10 +50,8 @@ struct rpmsg_device_ops { * @destroy_ept: see @rpmsg_destroy_ept(), required * @send: see @rpmsg_send(), required * @sendto: see @rpmsg_sendto(), optional - * @send_offchannel: see @rpmsg_send_offchannel(), optional * @trysend: see @rpmsg_trysend(), required * @trysendto: see @rpmsg_trysendto(), optional - * @trysend_offchannel: see @rpmsg_trysend_offchannel(), optional * @poll: see @rpmsg_poll(), optional * @set_flow_control: see @rpmsg_set_flow_control(), optional * @get_mtu: see @rpmsg_get_mtu(), optional @@ -67,13 +65,9 @@ struct rpmsg_endpoint_ops { =20 int (*send)(struct rpmsg_endpoint *ept, void *data, int len); int (*sendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst); - int (*send_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len); =20 int (*trysend)(struct rpmsg_endpoint *ept, void *data, int len); int (*trysendto)(struct rpmsg_endpoint *ept, void *data, int len, u32 dst= ); - int (*trysend_offchannel)(struct rpmsg_endpoint *ept, u32 src, u32 dst, - void *data, int len); __poll_t (*poll)(struct rpmsg_endpoint *ept, struct file *filp, poll_table *wait); int (*set_flow_control)(struct rpmsg_endpoint *ept, bool pause, u32 dst); --=20 2.49.0