linux-kernel - arch/arm/mach-omap2/sr_device.c:207:51: warning: variable 'sr

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Date:   Sat, 27 Mar 2021 13:05:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: arch/arm/mach-omap2/sr_device.c:207:51: warning: variable 'sr_inst'
 is uninitialized when used here

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0f4498cef9f5cd18d7c6639a2a902ec1edc5be4e
commit: fbfa463be8dc7957ee4f81556e9e1ea2a951807d ARM: OMAP2+: Fix smartreflex init regression after dropping legacy data
date:   6 weeks ago
config: arm-randconfig-r025-20210326 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project f490a5969bd52c8a48586f134ff8f02ccbb295b3)
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
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fbfa463be8dc7957ee4f81556e9e1ea2a951807d
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout fbfa463be8dc7957ee4f81556e9e1ea2a951807d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

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 >>):

>> arch/arm/mach-omap2/sr_device.c:207:51: warning: variable 'sr_inst' is uninitialized when used here [-Wuninitialized]
                           name = kasprintf(GFP_KERNEL, "smartreflex_%s", sr_inst[i]);
                                                                          ^~~~~~~
   arch/arm/mach-omap2/sr_device.c:191:29: note: initialize the variable 'sr_inst' to silence this warning
           const char * const *sr_inst;
                                      ^
                                       = NULL
   1 warning generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for TEGRA20_APB_DMA
   Depends on DMADEVICES && (ARCH_TEGRA || COMPILE_TEST
   Selected by
   - SOC_TEGRA_FUSE && ARCH_TEGRA && ARCH_TEGRA_2x_SOC


vim +/sr_inst +207 arch/arm/mach-omap2/sr_device.c

   188	
   189	int __init omap_devinit_smartreflex(void)
   190	{
   191		const char * const *sr_inst;
   192		int i, nr_sr = 0;
   193	
   194		if (soc_is_omap44xx()) {
   195			sr_inst = omap4_sr_instances;
   196			nr_sr = ARRAY_SIZE(omap4_sr_instances);
   197	
   198		} else if (soc_is_dra7xx()) {
   199			sr_inst = dra7_sr_instances;
   200			nr_sr = ARRAY_SIZE(dra7_sr_instances);
   201		}
   202	
   203		if (nr_sr) {
   204			const char *name, *voltdm;
   205	
   206			for (i = 0; i < nr_sr; i++) {
 > 207				name = kasprintf(GFP_KERNEL, "smartreflex_%s", sr_inst[i]);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (40295 bytes)