tty: fix kernel-doc for tty_{read,write}

After commits a9cbbb80e3e7 (tty: avoid using vfs_iocb_iter_write() for
redirected console writes) and dd78b0c483e3 (tty: implement read_iter),
the tty_read and tty_write kernel-doc comments don't match the code:
 tty_io.c:931: warning: Function parameter or member 'iocb' not described in 'tty_read'
 tty_io.c:931: warning: Function parameter or member 'to' not described in 'tty_read'
 tty_io.c:931: warning: Excess function parameter 'file' description in 'tty_read'
 tty_io.c:931: warning: Excess function parameter 'buf' description in 'tty_read'
 tty_io.c:931: warning: Excess function parameter 'count' description in 'tty_read'
 tty_io.c:931: warning: Excess function parameter 'ppos' description in 'tty_read'
 tty_io.c:1115: warning: Function parameter or member 'iocb' not described in 'file_tty_write'
 tty_io.c:1115: warning: Function parameter or member 'from' not described in 'file_tty_write'
 tty_io.c:1115: warning: expecting prototype for tty_write(). Prototype was for file_tty_write() instead

Fix them to correspond the reality, i.e. the switch from read/write to
read_iter/write_iter.

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210519072153.3859-3-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 8f9e897..ad64232 100644 (file)
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -911,10 +911,8 @@ static int iterate_tty_read(struct tty_ldisc *ld, struct tty_struct *tty,
 
 /**
  *     tty_read        -       read method for tty device files
- *     @file: pointer to tty file
- *     @buf: user buffer
- *     @count: size of user buffer
- *     @ppos: unused
+ *     @iocb: kernel I/O control block
+ *     @to: destination for the data read
  *
  *     Perform the read system call function on this terminal device. Checks
  *     for hung up devices before calling the line discipline method.
@@ -1092,23 +1090,6 @@ void tty_write_message(struct tty_struct *tty, char *msg)
        }
 }
 
-
-/**
- *     tty_write               -       write method for tty device file
- *     @file: tty file pointer
- *     @buf: user data to write
- *     @count: bytes to write
- *     @ppos: unused
- *
- *     Write data to a tty device via the line discipline.
- *
- *     Locking:
- *             Locks the line discipline as required
- *             Writes to the tty driver are serialized by the atomic_write_lock
- *     and are then processed in chunks to the device. The line discipline
- *     write method will not be invoked in parallel for each device.
- */
-
 static ssize_t file_tty_write(struct file *file, struct kiocb *iocb, struct iov_iter *from)
 {
        struct tty_struct *tty = file_tty(file);
@@ -1133,6 +1114,20 @@ static ssize_t file_tty_write(struct file *file, struct kiocb *iocb, struct iov_
        return ret;
 }
 
+/**
+ *     tty_write               -       write method for tty device file
+ *     @iocb: kernel I/O control block
+ *     @from: iov_iter with data to write
+ *
+ *     Write data to a tty device via the line discipline.
+ *
+ *     Locking:
+ *             Locks the line discipline as required
+ *             Writes to the tty driver are serialized by the atomic_write_lock
+ *             and are then processed in chunks to the device. The line
+ *             discipline write method will not be invoked in parallel for
+ *             each device.
+ */
 static ssize_t tty_write(struct kiocb *iocb, struct iov_iter *from)
 {
        return file_tty_write(iocb->ki_filp, iocb, from);