linux-kernel - [crng-random:jd/not-zero-entropy 7/12] arch/arm/include/asm/timex.h:14:63: error: implicit declaration of function 'sched

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Message-ID: <202204110106.XXNJ3BEs-lkp@intel.com>
Date:   Mon, 11 Apr 2022 01:06:20 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <zx2c4@...nel.org>
Cc:     kbuild-all@...ts.01.org, zx2c4@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [crng-random:jd/not-zero-entropy 7/12]
 arch/arm/include/asm/timex.h:14:63: error: implicit declaration of function
 'sched_clock'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git jd/not-zero-entropy
head:   efec3e2057963ad20223fa50a657b3ca9314ed45
commit: 904df0ccc3b52e7dffc4b968b8839d63ecba08ce [7/12] arm: use sched_clock() for random_get_entropy() instead of zero
config: arm-buildonly-randconfig-r001-20220410 (https://download.01.org/0day-ci/archive/20220411/202204110106.XXNJ3BEs-lkp@intel.com/config)
compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git/commit/?id=904df0ccc3b52e7dffc4b968b8839d63ecba08ce
        git remote add crng-random git://git.kernel.org/pub/scm/linux/kernel/git/crng/random.git
        git fetch --no-tags crng-random jd/not-zero-entropy
        git checkout 904df0ccc3b52e7dffc4b968b8839d63ecba08ce
        # 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=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from include/linux/timex.h:65,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/jiffies.h:10,
                    from lib/random32.c:38:
   lib/random32.c: In function 'prandom_init_early':
>> arch/arm/include/asm/timex.h:14:63: error: implicit declaration of function 'sched_clock' [-Werror=implicit-function-declaration]
      14 | #define random_get_entropy() ((unsigned long)(get_cycles() ?: sched_clock()))
         |                                                               ^~~~~~~~~~~
   lib/random32.c:469:22: note: in expansion of macro 'random_get_entropy'
     469 |                 v1 = random_get_entropy();
         |                      ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from include/linux/timex.h:65,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from crypto/jitterentropy-kcapi.c:41:
   crypto/jitterentropy-kcapi.c: In function 'jent_get_nstime':
>> arch/arm/include/asm/timex.h:14:63: error: implicit declaration of function 'sched_clock' [-Werror=implicit-function-declaration]
      14 | #define random_get_entropy() ((unsigned long)(get_cycles() ?: sched_clock()))
         |                                                               ^~~~~~~~~~~
   crypto/jitterentropy-kcapi.c:85:15: note: in expansion of macro 'random_get_entropy'
      85 |         tmp = random_get_entropy();
         |               ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/sched_clock +14 arch/arm/include/asm/timex.h

    11	
    12	typedef unsigned long cycles_t;
    13	#define get_cycles()	({ cycles_t c; read_current_timer(&c) ? 0 : c; })
  > 14	#define random_get_entropy() ((unsigned long)(get_cycles() ?: sched_clock()))
    15	

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