tree:   https://github.com/ammarfaizi2/linux-block brauner/linux/fs.xattr.simple.rework.rbtree
head:   b1999797db0738e60ae9730fcdd5ec6dd7604cd0
commit: b1999797db0738e60ae9730fcdd5ec6dd7604cd0 [1/1] xattr: use rbtree for simple_xattrs
config: m68k-randconfig-r021-20221110
compiler: m68k-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/b1999797db0738e60ae9730fcdd5ec6dd7604cd0
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block brauner/linux/fs.xattr.simple.rework.rbtree
        git checkout b1999797db0738e60ae9730fcdd5ec6dd7604cd0
        # 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=m68k SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

   fs/xattr.c: In function 'simple_xattr_add':
>> fs/xattr.c:1325:25: warning: variable 'parent' set but not used [-Wunused-but-set-variable]
    1325 |         struct rb_node *parent = NULL, **rbp;
         |                         ^~~~~~


vim +/parent +1325 fs/xattr.c

  1313	
  1314	/**
  1315	 * simple_xattr_add - add xattr objects
  1316	 * @xattrs: the header of the xattr object
  1317	 * @new_xattr: the xattr object to add
  1318	 *
  1319	 * Add an xattr object to @xattrs. This assumes no replacement or removal of
  1320	 * matching xattrs is wanted.
  1321	 */
  1322	void simple_xattr_add(struct simple_xattrs *xattrs,
  1323			      struct simple_xattr *new_xattr)
  1324	{
> 1325		struct rb_node *parent = NULL, **rbp;
  1326	
  1327		write_seqlock(&xattrs->lock);
  1328		rbp = &xattrs->rb_root.rb_node;
  1329		while (*rbp) {
  1330			struct simple_xattr *xattr;
  1331	
  1332			parent = *rbp;
  1333			xattr = rb_entry(*rbp, struct simple_xattr, rb_node);
  1334			if (strcmp(xattr->name, new_xattr->name) < 0)
  1335				rbp = &(*rbp)->rb_left;
  1336			else if (strcmp(xattr->name, new_xattr->name) > 0)
  1337				rbp = &(*rbp)->rb_right;
  1338			else
  1339				break;
  1340		}
  1341		rb_link_node_rcu(&new_xattr->rb_node, xattrs->rb_root.rb_node,
  1342				 &xattrs->rb_root.rb_node);
  1343		rb_insert_color(&new_xattr->rb_node, &xattrs->rb_root);
  1344		write_sequnlock(&xattrs->lock);
  1345	}
  1346	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp