Hi Tomer, Thank you for the patch! Yet something to improve: [auto build test ERROR on staging/staging-testing] url: https://github.com/0day-ci/linux/commits/Tomer-Samara/staging-android-Rem... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git bc752d2f345bf55d71b3422a6a24890ea03168dc config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/staging/android/ion/ion_page_pool.c: In function 'ion_page_pool_free': 83 | ion_page_pool_add(pool, page); | ^~~~~~~~~~~~~~~~~ At top level: drivers/staging/android/ion/ion_page_pool.c:28:13: warning: 'ion_page_pool_add' defined but not used [-Wunused-function] 28 | static void ion_page_pool_add(struct ion_page_pool *pool, struct page *page) | ^~~~~~~~~~~~~~~~~ # https://github.com/0day-ci/linux/commit/855a2d27af07d8bf02bc2f5cd75a7f87d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tomer-Samara/staging-android-Remove-BUG-BUG_ON-from-ion/20200821-233003 git checkout 855a2d27af07d8bf02bc2f5cd75a7f87d1e94686 vim +83 drivers/staging/android/ion/ion_page_pool.c 0214c7f20bf4d5d Rebecca Schultz Zavin 2013-12-13 78 0214c7f20bf4d5d Rebecca Schultz Zavin 2013-12-13 79 void ion_page_pool_free(struct ion_page_pool *pool, struct page *page) 0214c7f20bf4d5d Rebecca Schultz Zavin 2013-12-13 80 { 855a2d27af07d8b Tomer Samara 2020-08-21 81 WARN_ON(pool->order != compound_order(page)) bdeb9f1c4276864 Heesub Shin 2014-05-28 82 a3f75c43594ccfe Yisheng Xie 2018-02-12 @83 ion_page_pool_add(pool, page); 0214c7f20bf4d5d Rebecca Schultz Zavin 2013-12-13 84 } 0214c7f20bf4d5d Rebecca Schultz Zavin 2013-12-13 85 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org