From: Johan Hovold <johan@kernel.org>
To: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Johan Hovold <johan@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Xuefeng Li <lixuefeng@loongson.cn>
Subject: Re: [PATCH 1/2] USB: core: Fix build warning in usb_get_configuration()
Date: Wed, 26 Feb 2020 11:09:20 +0100 [thread overview]
Message-ID: <20200226100920.GW32540@localhost> (raw)
In-Reply-To: <d9637b5a-6d5e-17a1-e615-f828d311f654@loongson.cn>
On Wed, Feb 26, 2020 at 04:35:48PM +0800, Tiezhu Yang wrote:
> On 02/26/2020 04:04 PM, Johan Hovold wrote:
> > On Wed, Feb 26, 2020 at 02:15:22PM +0800, Tiezhu Yang wrote:
> >> There is no functional issue, just fix the following build warning:
> >>
> >> CC drivers/usb/core/config.o
> >> drivers/usb/core/config.c: In function ‘usb_get_configuration’:
> >> drivers/usb/core/config.c:868:6: warning: ‘result’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> >> int result;
> >> ^
> > What compiler are you using? The warning is clearly bogus and it hasn't
> > been seen with any recent gcc at least.
>
> [yangtiezhu@linux ~]$ gcc --version
> gcc (GCC) 4.9.4 20160726 (Red Hat 4.9.4-14)
> Copyright (C) 2015 Free Software Foundation, Inc.
>
> The gcc version I used maybe too old,
> if the warning is bogus, please ignore this patch.
Hmm. I even tried installing 4.9.4 and still don't see that warning (on
x86).
Are you sure that's the compiler version you use?
We've silenced bogus maybe-uninitialized warnings for 4.9 and newer
before, but we shouldn't be adding compiler workarounds unless we have
to.
Johan
prev parent reply other threads:[~2020-02-26 10:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-26 6:15 [PATCH 1/2] USB: core: Fix build warning in usb_get_configuration() Tiezhu Yang
2020-02-26 6:15 ` [PATCH 2/2] USB: core: Fix potential memory leak " Tiezhu Yang
2020-02-26 8:09 ` Johan Hovold
2020-02-26 8:42 ` Tiezhu Yang
2020-02-26 10:12 ` Johan Hovold
2020-02-26 8:04 ` [PATCH 1/2] USB: core: Fix build warning " Johan Hovold
2020-02-26 8:35 ` Tiezhu Yang
2020-02-26 10:09 ` Johan Hovold [this message]
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