linux-kernel - [ammarfaizi2-block:crng/random/jd/not-zero-entropy 3/12] kernel/time/timekeeping.c:2388: warning: expecting prototype for random_read_entropy_fallback(). Prototype was for random_get_entropy

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Date:   Tue, 12 Apr 2022 19:12:15 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <zx2c4@...nel.org>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:crng/random/jd/not-zero-entropy 3/12]
 kernel/time/timekeeping.c:2388: warning: expecting prototype for
 random_read_entropy_fallback(). Prototype was for
 random_get_entropy_fallback() instead

tree:   https://github.com/ammarfaizi2/linux-block crng/random/jd/not-zero-entropy
head:   4ee3bf173a552cd996e048d57f65bb5b471ab577
commit: aeeed98e20910aeafd5db8c56b449810b60bad9f [3/12] timekeeping: add raw clock fallback for random_get_entropy()
config: arc-buildonly-randconfig-r003-20220411 (https://download.01.org/0day-ci/archive/20220412/202204121944.p7MPjuCv-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/ammarfaizi2/linux-block/commit/aeeed98e20910aeafd5db8c56b449810b60bad9f
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block crng/random/jd/not-zero-entropy
        git checkout aeeed98e20910aeafd5db8c56b449810b60bad9f
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash kernel/time/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   kernel/time/timekeeping.c:1684: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * We have three kinds of time sources to use for sleep time
   kernel/time/timekeeping.c:1705: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * 1) can be determined whether to use or not only when doing
>> kernel/time/timekeeping.c:2388: warning: expecting prototype for random_read_entropy_fallback(). Prototype was for random_get_entropy_fallback() instead
   kernel/time/timekeeping.c:2396: warning: Function parameter or member 'txc' not described in 'do_adjtimex'
   kernel/time/timekeeping.c:2462: warning: Function parameter or member 'phase_ts' not described in 'hardpps'
   kernel/time/timekeeping.c:2462: warning: Function parameter or member 'raw_ts' not described in 'hardpps'


vim +2388 kernel/time/timekeeping.c

  2382	
  2383	/**
  2384	 * random_read_entropy_fallback - Returns the raw clock source value,
  2385	 * used by random.c for platforms with no valid random_get_entropy().
  2386	 */
  2387	unsigned long random_get_entropy_fallback(void)
> 2388	{
  2389		return tk_clock_read(&tk_core.timekeeper.tkr_mono);
  2390	}
  2391	

-- 
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