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| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2017-01-11 06:35:10 -0800 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2017-01-18 10:43:15 -0800 |
| commit | 84d58132d285b2edef951d6633c1e5224e8b5283 (patch) | |
| tree | f3894b00cce8e1c351ac1636cc756562e80991fc /include/linux/rpmsg.h | |
| parent | 5e53c42c33bbde53a2650c6aa7201ec63bbfdc49 (diff) | |
| download | lwn-84d58132d285b2edef951d6633c1e5224e8b5283.tar.gz lwn-84d58132d285b2edef951d6633c1e5224e8b5283.zip | |
rpmsg: Introduce "poll" to endpoint ops
This allows rpmsg backends to implement polling of the outgoing buffer,
which provides poll support to user space when using the rpmsg character
device.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'include/linux/rpmsg.h')
| -rw-r--r-- | include/linux/rpmsg.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h index 18f9e1ae4b7e..10d6ae8bbb7d 100644 --- a/include/linux/rpmsg.h +++ b/include/linux/rpmsg.h @@ -41,6 +41,7 @@ #include <linux/mod_devicetable.h> #include <linux/kref.h> #include <linux/mutex.h> +#include <linux/poll.h> #define RPMSG_ADDR_ANY 0xFFFFFFFF @@ -156,6 +157,9 @@ 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); +unsigned int rpmsg_poll(struct rpmsg_endpoint *ept, struct file *filp, + poll_table *wait); + #else static inline int register_rpmsg_device(struct rpmsg_device *dev) @@ -254,6 +258,15 @@ static inline int rpmsg_trysend_offchannel(struct rpmsg_endpoint *ept, u32 src, return -ENXIO; } +static inline unsigned int rpmsg_poll(struct rpmsg_endpoint *ept, + struct file *filp, poll_table *wait) +{ + /* This shouldn't be possible */ + WARN_ON(1); + + return 0; +} + #endif /* IS_ENABLED(CONFIG_RPMSG) */ /* use a macro to avoid include chaining to get THIS_MODULE */ |