linux-kernel - Re: [PATCH] initify_plugin: one more warning workaround

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Message-ID: <201703311857.cUqdeG2a%fengguang.wu@intel.com>
Date:   Fri, 31 Mar 2017 18:33:31 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...org, Emese Revfy <re.emese@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] initify_plugin: one more warning workaround

Hi Arnd,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11-rc4 next-20170330]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Arnd-Bergmann/initify_plugin-one-more-warning-workaround/20170331-161135
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

>> lib/vsprintf.c:2407: warning: No description found for parameter '3'
>> lib/vsprintf.c:2407: warning: Excess function parameter 'buf' description in '__unverified_nocapture'
>> lib/vsprintf.c:2407: warning: Excess function parameter 'size' description in '__unverified_nocapture'
>> lib/vsprintf.c:2407: warning: Excess function parameter 'fmt' description in '__unverified_nocapture'
>> lib/vsprintf.c:2407: warning: Excess function parameter 'bin_buf' description in '__unverified_nocapture'
   lib/crc32.c:148: warning: No description found for parameter 'tab)[256]'
   lib/crc32.c:148: warning: Excess function parameter 'tab' description in 'crc32_le_generic'
   lib/crc32.c:293: warning: No description found for parameter 'tab)[256]'
   lib/crc32.c:293: warning: Excess function parameter 'tab' description in 'crc32_be_generic'
   lib/crc32.c:1: warning: no structured comments found

vim +/3 +2407 lib/vsprintf.c

4370aa4a Lai Jiangshan       2009-03-06  2391   * This function like C99 vsnprintf, but the difference is that vsnprintf gets
4370aa4a Lai Jiangshan       2009-03-06  2392   * arguments from stack, and bstr_printf gets arguments from @bin_buf which is
4370aa4a Lai Jiangshan       2009-03-06  2393   * a binary buffer that generated by vbin_printf.
4370aa4a Lai Jiangshan       2009-03-06  2394   *
4370aa4a Lai Jiangshan       2009-03-06  2395   * The format follows C99 vsnprintf, but has some extensions:
0efb4d20 Steven Rostedt      2009-09-17  2396   *  see vsnprintf comment for details.
4370aa4a Lai Jiangshan       2009-03-06  2397   *
4370aa4a Lai Jiangshan       2009-03-06  2398   * The return value is the number of characters which would
4370aa4a Lai Jiangshan       2009-03-06  2399   * be generated for the given input, excluding the trailing
4370aa4a Lai Jiangshan       2009-03-06  2400   * '\0', as per ISO C99. If you want to have the exact
4370aa4a Lai Jiangshan       2009-03-06  2401   * number of characters written into @buf as return value
4370aa4a Lai Jiangshan       2009-03-06  2402   * (not including the trailing '\0'), use vscnprintf(). If the
4370aa4a Lai Jiangshan       2009-03-06  2403   * return is greater than or equal to @size, the resulting
4370aa4a Lai Jiangshan       2009-03-06  2404   * string is truncated.
4370aa4a Lai Jiangshan       2009-03-06  2405   */
85dcce6c Arnd Bergmann       2017-03-29  2406  __unverified_nocapture(3) int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
4370aa4a Lai Jiangshan       2009-03-06 @2407  {
fef20d9c Frederic Weisbecker 2009-03-06  2408  	struct printf_spec spec = {0};
d4be151b André Goddard Rosa  2009-12-14  2409  	char *str, *end;
d4be151b André Goddard Rosa  2009-12-14  2410  	const char *args = (const char *)bin_buf;
4370aa4a Lai Jiangshan       2009-03-06  2411  
762abb51 Rasmus Villemoes    2015-11-06  2412  	if (WARN_ON_ONCE(size > INT_MAX))
4370aa4a Lai Jiangshan       2009-03-06  2413  		return 0;
4370aa4a Lai Jiangshan       2009-03-06  2414  
4370aa4a Lai Jiangshan       2009-03-06  2415  	str = buf;

:::::: The code at line 2407 was first introduced by commit
:::::: 4370aa4aa75391a5e2e06bccb0919109f725ed8e vsprintf: add binary printf

:::::: TO: Lai Jiangshan <laijs@...fujitsu.com>
:::::: CC: Ingo Molnar <mingo@...e.hu>

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