[arm-integrator:kasan 6/6] mm/kasan/init.c:318:9: warning: variable 'pud' set but not used

[kernel test robot <lkp@intel.com>]

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Hi Andrey,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git kasan
head:   fb5e749f76335be35afcb3ea74ad3fa0926900db
commit: fb5e749f76335be35afcb3ea74ad3fa0926900db [6/6] ARM: Enable KASan for ARM
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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/linusw/linux-integrator.git/commit/?id=fb5e749f76335be35afcb3ea74ad3fa0926900db
        git remote add arm-integrator https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git
        git fetch --no-tags arm-integrator kasan
        git checkout fb5e749f76335be35afcb3ea74ad3fa0926900db
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

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

All warnings (new ones prefixed by >>):

   mm/kasan/init.c: In function 'kasan_free_pud':
>> mm/kasan/init.c:318:9: warning: variable 'pud' set but not used [-Wunused-but-set-variable]
     318 |  pud_t *pud;
         |         ^~~

vim +/pud +318 mm/kasan/init.c

0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  315  
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  316  static void kasan_free_pud(pud_t *pud_start, p4d_t *p4d)
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  317  {
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17 @318  	pud_t *pud;
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  319  	int i;
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  320  
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  321  	for (i = 0; i < PTRS_PER_PUD; i++) {
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  322  		pud = pud_start + i;
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  323  		if (!pud_none(*pud))
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  324  			return;
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  325  	}
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  326  
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  327  	pud_free(&init_mm, (pud_t *)page_to_virt(p4d_page(*p4d)));
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  328  	p4d_clear(p4d);
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  329  }
0207df4fa1a869 mm/kasan/kasan_init.c Andrey Ryabinin 2018-08-17  330  

:::::: The code@line 318 was first introduced by commit
:::::: 0207df4fa1a869281ddbf72db6203dbf036b3e1a kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN

:::::: TO: Andrey Ryabinin <aryabinin@virtuozzo.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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

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