Re: [PATCH/RFC] VFS: LOOKUP_MOUNTPOINT should used cached info whenever possible.

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

Hi NeilBrown,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on viro-vfs/for-next]
[also build test WARNING on vfs-idmapping/for-next linus/master v6.3-rc7]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/NeilBrown/VFS-LOOKUP_MOUNTPOINT-should-used-cached-info-whenever-possible/20230417-071435
base:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-next
patch link:    https://lore.kernel.org/r/168168683217.24821.6260957092725278201%40noble.neil.brown.name
patch subject: [PATCH/RFC] VFS: LOOKUP_MOUNTPOINT should used cached info whenever possible.
config: x86_64-randconfig-s021 (https://download.01.org/0day-ci/archive/20230417/202304171114.ZGYokKL6-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/7084d22d194837a61c41fb56ab65999c32b143bd
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review NeilBrown/VFS-LOOKUP_MOUNTPOINT-should-used-cached-info-whenever-possible/20230417-071435
        git checkout 7084d22d194837a61c41fb56ab65999c32b143bd
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304171114.ZGYokKL6-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/namei.c:501:5: sparse: sparse: symbol 'inode_permission_mp' was not declared. Should it be static?
   fs/namei.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...):
   include/linux/rcupdate.h:804:9: sparse: sparse: context imbalance in 'leave_rcu' - unexpected unlock
   fs/namei.c:2374:19: sparse: sparse: context imbalance in 'path_init' - different lock contexts for basic block

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests