diff options
Diffstat (limited to 'include/linux/relay.h')
| -rw-r--r-- | include/linux/relay.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/relay.h b/include/linux/relay.h index b3c4f49f6951..99d024475ba5 100644 --- a/include/linux/relay.h +++ b/include/linux/relay.h @@ -89,6 +89,8 @@ struct rchan_callbacks * The client should return 1 to continue logging, 0 to stop * logging. * + * This callback is optional. + * * NOTE: subbuf_start will also be invoked when the buffer is * created, so that the first sub-buffer can be initialized * if necessary. In this case, prev_subbuf will be NULL. @@ -122,6 +124,8 @@ struct rchan_callbacks * cause relay_open() to create a single global buffer rather * than the default set of per-cpu buffers. * + * This callback is mandatory. + * * See Documentation/filesystems/relay.rst for more info. */ struct dentry *(*create_buf_file)(const char *filename, @@ -139,6 +143,8 @@ struct rchan_callbacks * channel buffer. * * The callback should return 0 if successful, negative if not. + * + * This callback is mandatory. */ int (*remove_buf_file)(struct dentry *dentry); }; |