linux-kernel - [ammarfaizi2-block:crng/random/jd/vdso 3/3] drivers/char/random.c:164:42: error: expected declaration specifiers or '...' before '_vdso_rng

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Date:   Tue, 20 Sep 2022 16:53:55 +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 3/3]
 drivers/char/random.c:164:42: error: expected declaration specifiers or
 '...' before '_vdso_rng_data'

tree:   https://github.com/ammarfaizi2/linux-block crng/random/jd/vdso
head:   a7b31acb923dbd25e7bf030ca209f131c31f5288
commit: a7b31acb923dbd25e7bf030ca209f131c31f5288 [3/3] random: implement getrandom() in vDSO
config: arm-defconfig (https://download.01.org/0day-ci/archive/20220920/202209201604.aAX4Shb6-lkp@intel.com/config)
compiler: arm-linux-gnueabi-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/a7b31acb923dbd25e7bf030ca209f131c31f5288
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block crng/random/jd/vdso
        git checkout a7b31acb923dbd25e7bf030ca209f131c31f5288
        # 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=arm SHELL=/bin/bash drivers/

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:164:42: error: expected declaration specifiers or '...' before '_vdso_rng_data'
     164 | DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data);
         |                                          ^~~~~~~~~~~~~~


vim +164 drivers/char/random.c

   146	
   147	#define warn_unseeded_randomness() \
   148		if (IS_ENABLED(CONFIG_WARN_ALL_UNSEEDED_RANDOM) && !crng_ready()) \
   149			printk_deferred(KERN_NOTICE "random: %s called from %pS with crng_init=%d\n", \
   150					__func__, (void *)_RET_IP_, crng_init)
   151	
   152	
   153	
   154	/********************************************************************
   155	 *
   156	 * VDSO support helpers.
   157	 *
   158	 * The actual vDSO function is defined over in lib/vdso/getrandom.c,
   159	 * but this section contains the kernel-mode helpers to support that.
   160	 *
   161	 ********************************************************************/
   162	
   163	/* The shared data page. */
 > 164	DEFINE_VVAR_SINGLE(struct vdso_rng_data, _vdso_rng_data);
   165	

-- 
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https://01.org/lkp