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| author | Peter Hurley <peter@hurleysoftware.com> | 2014-06-16 09:16:58 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-10 16:05:19 -0700 |
| commit | ed617e44234ee03a60edbf0809f696f0b9cf1b90 (patch) | |
| tree | 0c949737a7744541f91ed7131fc38d6ffdd897f3 /include/linux/tty_driver.h | |
| parent | ed9891bf093638fad29f89c10b536550d29b129d (diff) | |
| download | lwn-ed617e44234ee03a60edbf0809f696f0b9cf1b90.tar.gz lwn-ed617e44234ee03a60edbf0809f696f0b9cf1b90.zip | |
tty: Document locking for tty driver methods
The tty core calls the tty driver's open, close and hangup
methods holding the tty lock.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty_driver.h')
| -rw-r--r-- | include/linux/tty_driver.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 756a60989294..e48c608a8fa8 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -35,14 +35,14 @@ * This routine is mandatory; if this routine is not filled in, * the attempted open will fail with ENODEV. * - * Required method. - * + * Required method. Called with tty lock held. + * * void (*close)(struct tty_struct * tty, struct file * filp); * * This routine is called when a particular tty device is closed. * Note: called even if the corresponding open() failed. * - * Required method. + * Required method. Called with tty lock held. * * void (*shutdown)(struct tty_struct * tty); * @@ -172,6 +172,8 @@ * * Optional: * + * Called with tty lock held. + * * int (*break_ctl)(struct tty_struct *tty, int state); * * This optional routine requests the tty driver to turn on or |