From: Arnd Bergmann <arnd@arndb.de>
To: kbuild test robot <fengguang.wu@intel.com>
Cc: Daniel Micay <danielmicay@gmail.com>,
kbuild-all@01.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: drivers/tty/serial/8250/8250_fintek.c:364: warning: 'probe_data' is used uninitialized in this function
Date: Wed, 9 Aug 2017 17:32:21 +0200 [thread overview]
Message-ID: <CAK8P3a3yweXF_rXgs7ymTfeiO=bRU3gOX=zGhQcMdz4nV7sk_A@mail.gmail.com> (raw)
In-Reply-To: <201708092333.gJ53XSff%fengguang.wu@intel.com>
On Wed, Aug 9, 2017 at 5:07 PM, kbuild test robot
<fengguang.wu@intel.com> wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: bfa738cf3dfae2111626650f86135f93c5ff0a22
> commit: 6974f0c4555e285ab217cee58b6e874f776ff409 include/linux/string.h: add the option of fortified string.h functions
> date: 4 weeks ago
> config: x86_64-randconfig-v0-08092220 (attached as .config)
> compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
> reproduce:
> git checkout 6974f0c4555e285ab217cee58b6e874f776ff409
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> All warnings (new ones prefixed by >>):
>
> In file included from include/linux/bitmap.h:8,
> from include/linux/cpumask.h:11,
> from arch/x86/include/asm/cpumask.h:4,
> from arch/x86/include/asm/msr.h:10,
> from arch/x86/include/asm/processor.h:20,
> from arch/x86/include/asm/cpufeature.h:4,
> from arch/x86/include/asm/thread_info.h:52,
> from include/linux/thread_info.h:37,
> from arch/x86/include/asm/preempt.h:6,
> from include/linux/preempt.h:80,
> from include/linux/spinlock.h:50,
> from include/linux/seqlock.h:35,
> from include/linux/time.h:5,
> from include/linux/stat.h:18,
> from include/linux/module.h:10,
> from drivers/tty/serial/8250/8250_fintek.c:11:
> include/linux/string.h: In function 'strcpy':
> include/linux/string.h:209: warning: '______f' is static but declared in inline function 'strcpy' which is not static
> include/linux/string.h:211: warning: '______f' is static but declared in inline function 'strcpy' which is not static
This clearly comes from __trace_if() when CONFIG_PROFILE_ALL_BRANCHES
is enabled. I did not see the warning with gcc-7.1.1, and I guess this only
happens on older compilers like the gcc-4.4 that was used here.
What is the reason for __FORTIFY_INLINE to be "extern __always_inline"
rather than "static __always_inline"? If they cannot just be 'static', maybe
this can be changed to depend on the compiler version.
Arnd
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next prev parent reply other threads:[~2017-08-09 15:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 15:07 kbuild test robot
2017-08-09 15:32 ` Arnd Bergmann [this message]
2017-08-09 15:47 ` Daniel Micay
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