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Message-ID: <202211120947.EQbaUVAR-lkp@intel.com>
Date: Sat, 12 Nov 2022 10:09:03 +0800
From: kernel test robot <lkp@...el.com>
To: Zhongkun He <hezhongkun.hzk@...edance.com>, corbet@....net,
mhocko@...e.com, akpm@...ux-foundation.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
linux-api@...r.kernel.org, linux-doc@...r.kernel.org,
Zhongkun He <hezhongkun.hzk@...edance.com>
Subject: Re: [PATCH v2] mm: add new syscall pidfd_set_mempolicy().
Hi Zhongkun,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Zhongkun-He/mm-add-new-syscall-pidfd_set_mempolicy/20221111-164156
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20221111084051.2121029-1-hezhongkun.hzk%40bytedance.com
patch subject: [PATCH v2] mm: add new syscall pidfd_set_mempolicy().
config: x86_64-randconfig-a014
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/intel-lab-lkp/linux/commit/da593185d0d1e8a20d1084142960f9ee46c5871b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Zhongkun-He/mm-add-new-syscall-pidfd_set_mempolicy/20221111-164156
git checkout da593185d0d1e8a20d1084142960f9ee46c5871b
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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@...el.com>
All warnings (new ones prefixed by >>):
>> mm/mempolicy.c:325:6: warning: no previous prototype for function 'mpol_put_async' [-Wmissing-prototypes]
void mpol_put_async(struct task_struct *task, struct mempolicy *p)
^
mm/mempolicy.c:325:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void mpol_put_async(struct task_struct *task, struct mempolicy *p)
^
static
1 warning generated.
vim +/mpol_put_async +325 mm/mempolicy.c
320
321 /*
322 * mpol destructor for pidfd_set_mempolicy().
323 * free mempolicy directly if task is null or task_work_add() failed.
324 */
> 325 void mpol_put_async(struct task_struct *task, struct mempolicy *p)
326 {
327 enum task_work_notify_mode notify = TWA_RESUME;
328
329 if (!atomic_dec_and_test(&p->refcnt))
330 return;
331
332 if (!task)
333 goto out;
334
335 init_task_work(&p->w.cb_head, mpol_free_async);
336 if (task_work_pending(task))
337 notify = TWA_SIGNAL; /* free memory in time */
338
339 if (!task_work_add(task, &p->w.cb_head, notify))
340 return;
341 out:
342 kmem_cache_free(policy_cache, p);
343 }
344
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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