From: Peter Hurley <peter@hurleysoftware.com>
To: kbuild test robot <lkp@intel.com>
Cc: kbuild-all@01.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.cz>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tty: fix badzero.cocci warnings
Date: Sat, 9 Jan 2016 23:02:40 -0800 [thread overview]
Message-ID: <56920210.4010001@hurleysoftware.com> (raw)
In-Reply-To: <20160110062417.GA74437@cairo>
On 01/09/2016 10:24 PM, kbuild test robot wrote:
> drivers/tty/tty_io.c:731:36-37: WARNING comparing pointer to 0
>
> Compare pointer-typed values to NULL rather than 0
>
> Semantic patch information:
> This makes an effort to choose between !x and x == NULL. !x is used
> if it has previously been used with the function used to initialize x.
> This relies on type information. More type information can be obtained
> using the option -all_includes and the option -I to specify an
> include path.
>
> Generated by: scripts/coccinelle/null/badzero.cocci
Not sure what possessed me to write 'cons_filp != 0'. Not my style, for sure.
Thanks.
Regards,
Peter Hurley
> CC: Peter Hurley <peter@hurleysoftware.com>
> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
> ---
>
> tty_io.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/drivers/tty/tty_io.c
> +++ b/drivers/tty/tty_io.c
> @@ -728,7 +728,7 @@ static void __tty_hangup(struct tty_stru
> while (refs--)
> tty_kref_put(tty);
>
> - tty_ldisc_hangup(tty, cons_filp != 0);
> + tty_ldisc_hangup(tty, cons_filp != NULL);
>
> spin_lock_irq(&tty->ctrl_lock);
> clear_bit(TTY_THROTTLED, &tty->flags);
>
next prev parent reply other threads:[~2016-01-10 7:02 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-27 21:38 [PATCH 00/19] Fix driver crashes on hangup Peter Hurley
2015-11-27 21:38 ` [PATCH 01/19] staging: digi: Replace open-coded tty_wakeup() Peter Hurley
2015-11-27 21:38 ` [PATCH 02/19] serial: 68328: Remove bogus ldisc reset Peter Hurley
2015-11-27 21:39 ` [PATCH 03/19] bluetooth: hci_ldisc: Remove dead code Peter Hurley
2015-12-02 7:47 ` Marcel Holtmann
2015-11-27 21:39 ` [PATCH 04/19] NFC: nci: " Peter Hurley
2015-11-27 21:39 ` [PATCH 05/19] tty: Remove chars_in_buffer() line discipline method Peter Hurley
2015-11-27 21:39 ` [PATCH 06/19] tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) Peter Hurley
2015-11-27 21:39 ` [PATCH 07/19] n_tty: Fix unsafe reference to "other" ldisc Peter Hurley
2015-11-27 21:39 ` [PATCH 08/19] tty: Reset c_line from driver's init_termios Peter Hurley
2015-11-27 21:39 ` [PATCH 09/19] staging/speakup: Use tty_ldisc_ref() for paste kworker Peter Hurley
2015-11-27 21:39 ` [PATCH 10/19] tty: Fix comments for tty_ldisc_get() Peter Hurley
2015-11-27 21:39 ` [PATCH 11/19] tty: Fix comments for tty_ldisc_release() Peter Hurley
2015-11-27 21:39 ` [PATCH 12/19] tty: Prepare for destroying line discipline on hangup Peter Hurley
2015-11-27 21:39 ` [PATCH 13/19] tty: Handle NULL tty->ldisc Peter Hurley
2015-11-27 21:39 ` [PATCH 14/19] tty: Move tty_ldisc_kill() Peter Hurley
2015-11-27 21:39 ` [PATCH 15/19] tty: Use 'disc' for line discipline index name Peter Hurley
2015-11-27 21:39 ` [PATCH 16/19] tty: Refactor tty_ldisc_reinit() for reuse Peter Hurley
2015-11-27 21:39 ` [PATCH 17/19] tty: Destroy ldisc instance on hangup Peter Hurley
2015-11-27 21:39 ` [PATCH 18/19] tty: Document c_line == N_TTY initial condition Peter Hurley
2015-11-27 21:39 ` [PATCH 19/19] tty: Touch up style issues in ldisc core Peter Hurley
2016-01-10 4:40 ` [PATCH v2 00/19] Fix driver crashes on hangup Peter Hurley
2016-01-10 4:40 ` [PATCH v2 01/19] staging: digi: Replace open-coded tty_wakeup() Peter Hurley
2016-01-10 4:40 ` [PATCH v2 02/19] serial: 68328: Remove bogus ldisc reset Peter Hurley
2016-01-10 4:40 ` [PATCH v2 03/19] bluetooth: hci_ldisc: Remove dead code Peter Hurley
2016-01-10 4:40 ` [PATCH v2 04/19] NFC: nci: " Peter Hurley
2016-01-10 4:40 ` [PATCH v2 05/19] tty: Remove chars_in_buffer() line discipline method Peter Hurley
2016-01-10 4:40 ` [PATCH v2 06/19] tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) Peter Hurley
2016-01-10 5:24 ` Peter Hurley
2016-01-10 4:40 ` [PATCH v2 07/19] n_tty: Fix unsafe reference to "other" ldisc Peter Hurley
2016-01-10 5:26 ` Peter Hurley
2016-01-10 4:40 ` [PATCH v2 08/19] tty: Reset c_line from driver's init_termios Peter Hurley
2016-01-10 4:41 ` [PATCH v2 09/19] staging/speakup: Use tty_ldisc_ref() for paste kworker Peter Hurley
2016-01-10 23:16 ` Ben Hutchings
2016-01-11 0:25 ` Peter Hurley
2016-01-11 5:40 ` Peter Hurley
2016-01-11 10:37 ` Ben Hutchings
2016-01-10 4:41 ` [PATCH v2 10/19] tty: Fix comments for tty_ldisc_get() Peter Hurley
2016-01-10 4:41 ` [PATCH v2 11/19] tty: Fix comments for tty_ldisc_release() Peter Hurley
2016-01-10 4:41 ` [PATCH v2 12/19] tty: Prepare for destroying line discipline on hangup Peter Hurley
2016-01-10 4:41 ` [PATCH v2 13/19] tty: Handle NULL tty->ldisc Peter Hurley
2016-01-10 4:41 ` [PATCH v2 14/19] tty: Move tty_ldisc_kill() Peter Hurley
2016-01-10 4:41 ` [PATCH v2 15/19] tty: Use 'disc' for line discipline index name Peter Hurley
2016-01-10 4:41 ` [PATCH v2 16/19] tty: Refactor tty_ldisc_reinit() for reuse Peter Hurley
2016-01-10 4:41 ` [PATCH v2 17/19] tty: Destroy ldisc instance on hangup Peter Hurley
2016-01-10 6:24 ` kbuild test robot
2016-01-10 6:24 ` [PATCH] tty: fix badzero.cocci warnings kbuild test robot
2016-01-10 7:02 ` Peter Hurley [this message]
2016-01-10 4:41 ` [PATCH v2 18/19] tty: Document c_line == N_TTY initial condition Peter Hurley
2016-01-10 4:41 ` [PATCH v2 19/19] tty: Avoid unnecessary temporaries for tty->ldisc Peter Hurley
2016-01-11 6:40 ` [PATCH v3 00/19] Fix driver crashes on hangup Peter Hurley
2016-01-11 6:40 ` [PATCH v3 01/19] staging: digi: Replace open-coded tty_wakeup() Peter Hurley
2016-01-11 6:40 ` [PATCH v3 02/19] serial: 68328: Remove bogus ldisc reset Peter Hurley
2016-01-11 14:12 ` One Thousand Gnomes
2016-01-11 6:40 ` [PATCH v3 03/19] bluetooth: hci_ldisc: Remove dead code Peter Hurley
2016-01-11 6:40 ` [PATCH v3 04/19] NFC: nci: " Peter Hurley
2016-01-11 6:40 ` [PATCH v3 05/19] tty: Remove chars_in_buffer() line discipline method Peter Hurley
2016-01-11 6:40 ` [PATCH v3 06/19] tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) Peter Hurley
2016-01-11 6:40 ` [PATCH v3 07/19] n_tty: Fix unsafe reference to "other" ldisc Peter Hurley
2016-01-11 6:40 ` [PATCH v3 08/19] tty: Reset c_line from driver's init_termios Peter Hurley
2016-01-11 6:40 ` [PATCH v3 09/19] staging/speakup: Use tty_ldisc_ref() for paste kworker Peter Hurley
2016-01-11 6:40 ` [PATCH v3 10/19] tty: Fix comments for tty_ldisc_get() Peter Hurley
2016-01-11 6:41 ` [PATCH v3 11/19] tty: Fix comments for tty_ldisc_release() Peter Hurley
2016-01-11 6:41 ` [PATCH v3 12/19] tty: Prepare for destroying line discipline on hangup Peter Hurley
2016-01-11 6:41 ` [PATCH v3 13/19] tty: Handle NULL tty->ldisc Peter Hurley
2016-01-11 6:41 ` [PATCH v3 14/19] tty: Move tty_ldisc_kill() Peter Hurley
2016-01-11 6:41 ` [PATCH v3 15/19] tty: Use 'disc' for line discipline index name Peter Hurley
2016-01-11 6:41 ` [PATCH v3 16/19] tty: Refactor tty_ldisc_reinit() for reuse Peter Hurley
2016-01-11 6:41 ` [PATCH v3 17/19] tty: Destroy ldisc instance on hangup Peter Hurley
2016-01-11 6:41 ` [PATCH v3 18/19] tty: Document c_line == N_TTY initial condition Peter Hurley
2016-01-11 6:41 ` [PATCH v3 19/19] tty: Avoid unnecessary temporaries for tty->ldisc Peter Hurley
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