linux-kernel - [ammarfaizi2-block:crng/random/jd/vdso 8/8] drivers/char/random.c:88:42: error: expected declaration specifiers or '...' before '_vdso_rng

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Date:   Sat, 30 Jul 2022 11:44:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <zx2c4@...nel.org>
Cc:     kbuild-all@...ts.01.org, Ammar Faizi <ammarfaizi2@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:crng/random/jd/vdso 8/8]
 drivers/char/random.c:88:42: error: expected declaration specifiers or '...'
 before '_vdso_rng_data'

tree:   https://github.com/ammarfaizi2/linux-block crng/random/jd/vdso
head:   65b88fc7d65669b6a7f4225aa00acf18b82a7682
commit: 65b88fc7d65669b6a7f4225aa00acf18b82a7682 [8/8] random: implement getrandom() in vDSO
config: csky-randconfig-r012-20220729 (https://download.01.org/0day-ci/archive/20220730/202207301142.4Kf53jZQ-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 12.1.0
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/65b88fc7d65669b6a7f4225aa00acf18b82a7682
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block crng/random/jd/vdso
        git checkout 65b88fc7d65669b6a7f4225aa00acf18b82a7682
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash drivers/char/

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

All errors (new ones prefixed by >>):

>> drivers/char/random.c:88:42: error: expected declaration specifiers or '...' before '_vdso_rng_data'
      88 | DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data);
         |                                          ^~~~~~~~~~~~~~


vim +88 drivers/char/random.c

    63	
    64	/*********************************************************************
    65	 *
    66	 * Initialization and readiness waiting.
    67	 *
    68	 * Much of the RNG infrastructure is devoted to various dependencies
    69	 * being able to wait until the RNG has collected enough entropy and
    70	 * is ready for safe consumption.
    71	 *
    72	 *********************************************************************/
    73	
    74	/*
    75	 * crng_init is protected by base_crng->lock, and only increases
    76	 * its value (from empty->early->ready).
    77	 */
    78	static enum {
    79		CRNG_EMPTY = 0, /* Little to no entropy collected */
    80		CRNG_EARLY = 1, /* At least POOL_EARLY_BITS collected */
    81		CRNG_READY = 2  /* Fully initialized with POOL_READY_BITS collected */
    82	} crng_init __read_mostly = CRNG_EMPTY;
    83	static DEFINE_STATIC_KEY_FALSE(crng_is_ready);
    84	#define crng_ready() (static_branch_likely(&crng_is_ready) || crng_init >= CRNG_READY)
    85	/* Various types of waiters for crng_init->CRNG_READY transition. */
    86	static DECLARE_WAIT_QUEUE_HEAD(crng_init_wait);
    87	static struct fasync_struct *fasync;
  > 88	DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data);
    89	

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