tree:   git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   c6b169e6ffb962068153bd92b0c4ecbd731a122f
commit: e2e60954eae9929a982d12b6ff24a91b37822f34 [6299/6518] zswap: change zpool/compressor at runtime
config: s390-allyesconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout e2e60954eae9929a982d12b6ff24a91b37822f34
  # save the attached .config to linux build tree
  make.cross ARCH=s390 

All warnings (new ones prefixed by >>):

   mm/zswap.c: In function '__zswap_param_set':
>> mm/zswap.c:759:1: warning: '__zswap_param_set' uses dynamic stack allocation
    }
    ^

vim +/__zswap_param_set +759 mm/zswap.c

   743			 * list; if it's new (and empty) then it'll be removed and
   744			 * destroyed by the put after we drop the lock
   745			 */
   746			list_add_tail_rcu(&pool->list, &zswap_pools);
   747			put_pool = pool;
   748		}
   749	
   750		spin_unlock(&zswap_pools_lock);
   751	
   752		/* drop the ref from either the old current pool,
   753		 * or the new pool we failed to add
   754		 */
   755		if (put_pool)
   756			zswap_pool_put(put_pool);
   757	
   758		return ret;
 > 759	}
   760	
   761	static int zswap_compressor_param_set(const char *val,
   762					      const struct kernel_param *kp)
   763	{
   764		return __zswap_param_set(val, kp, zswap_zpool_type, NULL);
   765	}
   766	
   767	static int zswap_zpool_param_set(const char *val,

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation