From: Sebastian Reichel <sre@kernel.org>
To: Rob Herring <robh@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Marcel Holtmann <marcel@holtmann.org>,
Jiri Slaby <jslaby@suse.com>, Arnd Bergmann <arnd@arndb.de>,
"Dr . H . Nikolaus Schaller" <hns@goldelico.com>,
Peter Hurley <peter@hurleysoftware.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Alan Cox <gnomes@lxorguk.ukuu.org.uk>,
Loic Poulain <loic.poulain@intel.com>,
Pavel Machek <pavel@ucw.cz>, NeilBrown <neil@brown.name>,
Linus Walleij <linus.walleij@linaro.org>,
linux-bluetooth@vger.kernel.org, linux-serial@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/9] tty: move the non-file related parts of tty_release to new tty_release_struct
Date: Sun, 8 Jan 2017 23:42:48 +0100 [thread overview]
Message-ID: <20170108224248.pabp3z7jiclkzh5y@earth> (raw)
In-Reply-To: <20170106162635.19677-2-robh@kernel.org>
[-- Attachment #1: Type: text/plain, Size: 1737 bytes --]
Hi,
On Fri, Jan 06, 2017 at 10:26:27AM -0600, Rob Herring wrote:
> For in-kernel tty users, we need to be able to create and destroy
> 'struct tty' that are not associated with a file. The creation side is
> fine, but tty_release() needs to be split into the file handle portion
> and the struct tty portion. Introduce a new function, tty_release_struct,
> to handle just the destroying of a struct tty.
>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> drivers/tty/tty_io.c | 42 ++++++++++++++++++++++++------------------
> include/linux/tty.h | 1 +
> 2 files changed, 25 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
> index 734a635e7363..5ebc090ec47f 100644
> --- a/drivers/tty/tty_io.c
> +++ b/drivers/tty/tty_io.c
> @@ -1744,6 +1744,29 @@ static int tty_release_checks(struct tty_struct *tty, int idx)
> return 0;
> }
>
> +void tty_release_struct(struct tty_struct *tty, int idx)
> +{
> + /*
> + * Ask the line discipline code to release its structures
> + */
> + tty_ldisc_release(tty);
> +
> + /* Wait for pending work before tty destruction commmences */
> + tty_flush_works(tty);
> +
> + tty_debug_hangup(tty, "freeing structure\n");
> + /*
> + * The release_tty function takes care of the details of clearing
> + * the slots and preserving the termios structure. The tty_unlock_pair
> + * should be safe as we keep a kref while the tty is locked (so the
> + * unlock never unlocks a freed tty).
> + */
> + mutex_lock(&tty_mutex);
> + release_tty(tty, idx);
> + mutex_unlock(&tty_mutex);
> +}
> +EXPORT_SYMBOL_GPL(tty_release_struct);
tty_release_struct() is missing kernel docs.
> [...]
-- Sebastian
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2017-01-08 22:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-06 16:26 [PATCH 0/9] Serial slave device bus Rob Herring
2017-01-06 16:26 ` [PATCH 1/9] tty: move the non-file related parts of tty_release to new tty_release_struct Rob Herring
2017-01-08 22:42 ` Sebastian Reichel [this message]
2017-01-06 16:26 ` [PATCH 2/9] tty_port: allow a port to be opened with a tty that has no file handle Rob Herring
2017-01-13 16:46 ` Rob Herring
2017-01-06 16:26 ` [PATCH 3/9] tty_port: make tty_port_register_device wrap tty_port_register_device_attr Rob Herring
2017-01-06 16:26 ` [PATCH 4/9] tty: constify tty_ldisc_receive_buf buffer pointer Rob Herring
2017-01-06 16:26 ` [PATCH 5/9] tty_port: Add port client functions Rob Herring
2017-01-06 16:26 ` [PATCH 6/9] dt/bindings: Add a serial/UART attached device binding Rob Herring
2017-01-06 19:21 ` Arnd Bergmann
2017-01-06 20:41 ` Rob Herring
2017-01-10 19:50 ` One Thousand Gnomes
2017-01-10 21:41 ` Pavel Machek
2017-01-06 16:26 ` [PATCH 7/9] serdev: Introduce new bus for serial attached devices Rob Herring
2017-01-07 14:02 ` Andy Shevchenko
2017-01-12 20:13 ` Rob Herring
2017-01-08 22:41 ` Sebastian Reichel
2017-01-10 21:46 ` Pavel Machek
2017-01-12 19:53 ` Rob Herring
2017-01-06 16:26 ` [PATCH 8/9] serdev: add a tty port controller driver Rob Herring
2017-01-07 14:11 ` Andy Shevchenko
2017-01-12 16:01 ` Rob Herring
2017-01-13 15:04 ` Andy Shevchenko
2017-01-13 15:28 ` Rob Herring
2017-01-13 15:55 ` Andy Shevchenko
2017-01-10 22:04 ` Pavel Machek
2017-01-14 2:54 ` Rob Herring
2017-01-06 16:26 ` [PATCH 9/9] tty_port: register tty ports with serdev bus Rob Herring
2017-01-06 19:25 ` [PATCH 0/9] Serial slave device bus Arnd Bergmann
2017-01-07 11:00 ` Andy Shevchenko
2017-01-10 17:24 ` Rob Herring
2017-01-10 18:32 ` Marcel Holtmann
2017-01-08 22:46 ` Sebastian Reichel
2017-01-10 11:44 ` H. Nikolaus Schaller
2017-01-10 12:02 ` Marcel Holtmann
2017-01-10 12:10 ` H. Nikolaus Schaller
2017-01-10 12:20 ` Andy Shevchenko
2017-01-10 12:40 ` H. Nikolaus Schaller
[not found] ` <CAL_JsqL-VMQ+zCTN+4+PPPCY+-askp=H908s8R=EjjytzuC8yw@mail.gmail.com>
[not found] ` <39C27218-E564-4C7D-A8CD-8D7F654EE2B3@goldelico.com>
2017-01-13 14:48 ` Rob Herring
2017-01-16 6:46 ` H. Nikolaus Schaller
2017-01-10 12:05 ` Marcel Holtmann
2017-01-10 22:05 ` Pavel Machek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170108224248.pabp3z7jiclkzh5y@earth \
--to=sre@kernel.org \
--cc=andriy.shevchenko@linux.intel.com \
--cc=arnd@arndb.de \
--cc=gnomes@lxorguk.ukuu.org.uk \
--cc=gregkh@linuxfoundation.org \
--cc=hns@goldelico.com \
--cc=jslaby@suse.com \
--cc=linus.walleij@linaro.org \
--cc=linux-bluetooth@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=loic.poulain@intel.com \
--cc=marcel@holtmann.org \
--cc=neil@brown.name \
--cc=pavel@ucw.cz \
--cc=peter@hurleysoftware.com \
--cc=robh@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).