linux-kernel - Re: [PATCH 08/14] Input: adxl34x - fix gcc-7 -Wint-in-bool-context warning

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 14 Jul 2017 22:17:10 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>, Guenter Roeck <linux@...ck-us.net>,
        IDE-ML <linux-ide@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        DRI <dri-devel@...ts.freedesktop.org>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>
Subject: Re: [PATCH 08/14] Input: adxl34x - fix gcc-7 -Wint-in-bool-context warning

On Fri, Jul 14, 2017 at 9:24 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Fri, Jul 14, 2017 at 2:25 AM, Arnd Bergmann <arnd@...db.de> wrote:
>> FIFO_MODE is an macro expression with a '<<' operator, which
>> gcc points out could be misread as a '<':
>
> Yeah, no, NAK again.
>
> We don't make the code look worse just because gcc is being a f*cking
> moron about things.
>
> This warning is clearly pure garbage.
>

I looked at this one again and found a better approach, matching the
check that is done a few lines later. Unless you find something wrong
with that one, I'd resubmit it with the fixup below.

      Arnd

--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -789,21 +789,21 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
                __set_bit(pdata->ev_code_ff, input_dev->keybit);
        }

        if (pdata->ev_code_act_inactivity)
                __set_bit(pdata->ev_code_act_inactivity, input_dev->keybit);

        ac->int_mask |= ACTIVITY | INACTIVITY;

        if (pdata->watermark) {
                ac->int_mask |= WATERMARK;
-               if (FIFO_MODE(pdata->fifo_mode) == 0)
+               if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS)
                        ac->pdata.fifo_mode |= FIFO_STREAM;
        } else {
                ac->int_mask |= DATA_READY;
        }

        if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN))
                ac->int_mask |= SINGLE_TAP | DOUBLE_TAP;

        if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS)
                ac->fifo_delay = false;