[arnd-playground:to-build 160/350] drivers/block/drbd/drbd_main.c:1109:37: warning: left shift of negative value

[arnd-playground:to-build 160/350] drivers/block/drbd/drbd_main.c:1109:37: warning: left shift of negative value

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git to-build
head:   fe197c065a93b860c59017cf6933889c69842ef7
commit: 066971786203a343d55b79cf52b8e82e50026cc6 [160/350] warnings: modify which warnings are enabled
config: i386-randconfig-a016-20201201 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=066971786203a343d55b79cf52b8e82e50026cc6
        git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
        git fetch --no-tags arnd-playground to-build
        git checkout 066971786203a343d55b79cf52b8e82e50026cc6
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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 >>):

   drivers/block/drbd/drbd_main.c: In function 'dcbp_set_pad_bits':
>> drivers/block/drbd/drbd_main.c:1109:37: warning: left shift of negative value [-Wshift-negative-value]
    1109 |  p->encoding = (p->encoding & (~0x7 << 4)) | (n << 4);
         |                                     ^~
   drivers/block/drbd/drbd_main.c: In function 'cmdname':
   drivers/block/drbd/drbd_main.c:3676:22: warning: initialized field overwritten [-Woverride-init]
    3676 |   [P_RETRY_WRITE]  = "retry_write",
         |                      ^~~~~~~~~~~~~
   drivers/block/drbd/drbd_main.c:3676:22: note: (near initialization for 'cmdnames[44]')

vim +1109 drivers/block/drbd/drbd_main.c

b411b3637fa71fc Philipp Reisner     2009-09-25  1105  
a02d124091ac717 Andreas Gruenbacher 2011-03-22  1106  static void dcbp_set_pad_bits(struct p_compressed_bm *p, int n)
a02d124091ac717 Andreas Gruenbacher 2011-03-22  1107  {
a02d124091ac717 Andreas Gruenbacher 2011-03-22  1108  	BUG_ON(n & ~0x7);
a02d124091ac717 Andreas Gruenbacher 2011-03-22 @1109  	p->encoding = (p->encoding & (~0x7 << 4)) | (n << 4);
b411b3637fa71fc Philipp Reisner     2009-09-25  1110  }
b411b3637fa71fc Philipp Reisner     2009-09-25  1111  

:::::: The code@line 1109 was first introduced by commit
:::::: a02d124091ac7178c24a1318e5dcc4ae7fe6c8e1 drbd: Rename the DCBP_* functions to dcbp_* and move them to where they are used

:::::: TO: Andreas Gruenbacher <agruen@linbit.com>
:::::: CC: Philipp Reisner <philipp.reisner@linbit.com>

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

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