Messages in this thread | | | Date | Thu, 30 Sep 2021 08:41:28 +0800 | From | kernel test robot <> | Subject | [mel:mm-reclaimcongest-v1r4 1/5] mm/vmscan.c:1015:7: error: variable 'ret' set but not used |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-reclaimcongest-v1r4 head: 07285068a0f1fb7bee052bf5a4b71c4d8d4b2f77 commit: a7f2d5fd13a3022b3906b6f849998b726fa3eb83 [1/5] mm/vmscan: Throttle reclaim until some writeback completes if congested config: hexagon-buildonly-randconfig-r005-20210929 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498) 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://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git/commit/?id=a7f2d5fd13a3022b3906b6f849998b726fa3eb83 git remote add mel https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git git fetch --no-tags mel mm-reclaimcongest-v1r4 git checkout a7f2d5fd13a3022b3906b6f849998b726fa3eb83 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> mm/vmscan.c:1015:7: error: variable 'ret' set but not used [-Werror,-Wunused-but-set-variable] long ret; ^ mm/vmscan.c:1381:6: error: variable 'err' set but not used [-Werror,-Wunused-but-set-variable] int err; ^ 2 errors generated.
vim +/ret +1015 mm/vmscan.c
1008 1009 static void 1010 reclaim_throttle(pg_data_t *pgdat, enum vmscan_throttle_state reason, 1011 long timeout) 1012 { 1013 wait_queue_head_t *wqh = &pgdat->reclaim_wait; 1014 unsigned long start = jiffies; > 1015 long ret; 1016 DEFINE_WAIT(wait); 1017 1018 atomic_inc(&pgdat->nr_reclaim_throttled); 1019 WRITE_ONCE(pgdat->nr_reclaim_start, 1020 node_page_state(pgdat, NR_THROTTLED_WRITTEN)); 1021 1022 prepare_to_wait(wqh, &wait, TASK_INTERRUPTIBLE); 1023 ret = schedule_timeout(timeout); 1024 finish_wait(wqh, &wait); 1025 atomic_dec(&pgdat->nr_reclaim_throttled); 1026 1027 trace_mm_vmscan_throttled(pgdat->node_id, jiffies_to_usecs(timeout), 1028 jiffies_to_usecs(jiffies - start), 1029 reason); 1030 } 1031
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