linux-kernel - Re: [PATCH] staging: android: ion: reduce lock contention latency

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Message-ID: <201703170241.fhy6DpeJ%fengguang.wu@intel.com>
Date:   Fri, 17 Mar 2017 02:58:32 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Junil Lee <junil0814.lee@....com>
Cc:     kbuild-all@...org, labbott@...hat.com, sumit.semwal@...aro.org,
        gregkh@...uxfoundation.org, arve@...roid.com,
        riandrews@...roid.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, Junil Lee <junil0814.lee@....com>,
        Bongkyu Kim <bongkyu.kim@....com>
Subject: Re: [PATCH] staging: android: ion: reduce lock contention latency

Hi Junil,

[auto build test ERROR on staging/staging-testing]
[also build test ERROR on v4.11-rc2 next-20170310]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Junil-Lee/staging-android-ion-reduce-lock-contention-latency/20170317-021346
config: x86_64-randconfig-x004-201711 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/staging/android/ion/ion_page_pool.c: In function 'ion_page_pool_remove':
>> drivers/staging/android/ion/ion_page_pool.c:68:9: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
       node = llist_entry((struct list_head *)node, struct page, lru);
            ^
   drivers/staging/android/ion/ion_page_pool.c:74:9: error: assignment from incompatible pointer type [-Werror=incompatible-pointer-types]
       node = llist_entry((struct list_head *)node, struct page, lru);
            ^
   cc1: some warnings being treated as errors

vim +68 drivers/staging/android/ion/ion_page_pool.c

    62		struct llist_node *node;
    63	
    64		if (high) {
    65			BUG_ON(!atomic_read(&pool->high_count));
    66			node = llist_del_first(&pool->high_items);
    67			if (node)
  > 68				node = llist_entry((struct list_head *)node, struct page, lru);
    69			atomic_dec(&pool->high_count);
    70		} else {
    71			BUG_ON(!atomic_read(&pool->low_count));

---
0-DAY kernel test infrastructure                Open Source Technology Center
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