2022-04-08 08:07:24

by kernel test robot

Subject: [mcgrof:sysctl-testing 12/18] mm/page-writeback.c:93:28: warning: unused variable 'dirty_bytes_min'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git sysctl-testing
head: 7cde53da38a3ea00d75ef6a6ab06fa85b80bcf87
commit: 87125d15aa3c4046e902758a39062f213b3664ad [12/18] mm: move page-writeback sysctls to their own file
config: s390-randconfig-r034-20220406 (https://download.01.org/0day-ci/archive/20220408/[email protected]/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 6b306233f78876a1d197ed6e1f05785505de7c63)
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 s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?id=87125d15aa3c4046e902758a39062f213b3664ad
git remote add mcgrof https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git
git fetch --no-tags mcgrof sysctl-testing
git checkout 87125d15aa3c4046e902758a39062f213b3664ad
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All warnings (new ones prefixed by >>):

>> mm/page-writeback.c:93:28: warning: unused variable 'dirty_bytes_min' [-Wunused-const-variable]
static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
^
1 warning generated.


vim +/dirty_bytes_min +93 mm/page-writeback.c

91
92 /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
> 93 static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
94

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

2022-04-16 01:14:48

by Luis Chamberlain

Subject: Re: [mcgrof:sysctl-testing 12/18] mm/page-writeback.c:93:28: warning: unused variable 'dirty_bytes_min'

On Fri, Apr 08, 2022 at 03:38:53PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git sysctl-testing
> head: 7cde53da38a3ea00d75ef6a6ab06fa85b80bcf87
> commit: 87125d15aa3c4046e902758a39062f213b3664ad [12/18] mm: move page-writeback sysctls to their own file
> config: s390-randconfig-r034-20220406 (https://download.01.org/0day-ci/archive/20220408/[email protected]/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 6b306233f78876a1d197ed6e1f05785505de7c63)
> 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 s390 cross compiling tool for clang build
> # apt-get install binutils-s390x-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?id=87125d15aa3c4046e902758a39062f213b3664ad
> git remote add mcgrof https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git
> git fetch --no-tags mcgrof sysctl-testing
> git checkout 87125d15aa3c4046e902758a39062f213b3664ad
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <[email protected]>
>
> All warnings (new ones prefixed by >>):

I'll post a fix.

Luis