rpmsg: core: Remove deadcode

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 <linux@treblig.org>
Acked-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Link: https://lore.kernel.org/r/20250429234600.301083-2-linux@treblig.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

diff --git a/Documentation/staging/rpmsg.rst b/Documentation/staging/rpmsg.rst
index 3713adaa1608f60bc663efd25af6fbbd2f571241..40282cca86ca8d8f201781c8703582eca8f09689 100644 (file)
--- a/Documentation/staging/rpmsg.rst
+++ b/Documentation/staging/rpmsg.rst
@@ -110,31 +110,6 @@ or a timeout of 15 seconds elapses. When the latter happens,
 The function can only be called from a process context (for now).
 Returns 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);
-
-
-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.
-
 ::
 
   int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
@@ -173,27 +148,6 @@ 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.
 
-::
-
-  int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
-                                                       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.
-
 ::
 
   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 207b64c0a2fe9ccdb03b4ed66d1cee81e6f4c1ae..6ee36adcbdba4d9b25534ffe0b97a09af46f1ede 100644 (file)
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -193,38 +193,6 @@ int rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst)
 }
 EXPORT_SYMBOL(rpmsg_sendto);
 
-/**
- * rpmsg_send_offchannel() - send a message using explicit src/dst addresses
- * @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 latter
- * 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);
 
-/**
- * rpmsg_trysend_offchannel() - send a message using explicit src/dst addresses
- * @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 90d8e4475f80ed9ed8df40c81a3a8c4aba7e7aca..fb7ab91656458e10c11a39782bf7e829e6c6058b 100644 (file)
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -184,13 +184,9 @@ struct rpmsg_endpoint *rpmsg_create_ept(struct rpmsg_device *,
 
 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);
 
 int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len);
 int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dst);
-int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, u32 dst,
-                            void *data, int len);
 
 __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,
 
 }
 
-static inline int rpmsg_send_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 int rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len)
 {
        /* This shouldn't be possible */
@@ -297,15 +284,6 @@ static inline int rpmsg_trysendto(struct rpmsg_endpoint *ept, void *data,
        return -ENXIO;
 }
 
-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)
 {