linux-kernel - Re: [PATCHv2 4/4] staging: android: ion: Add ioctl to query available heaps

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Date:   Fri, 2 Sep 2016 07:44:48 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Laura Abbott <labbott@...hat.com>
Cc:     kbuild-all@...org, Sumit Semwal <sumit.semwal@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Riley Andrews <riandrews@...roid.com>,
        Laura Abbott <labbott@...hat.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        linaro-mm-sig@...ts.linaro.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org,
        Eun Taik Lee <eun.taik.lee@...sung.com>,
        Liviu Dudau <Liviu.Dudau@....com>,
        Jon Medhurst <tixy@...aro.org>,
        Mitchel Humpherys <mitchelh@...eaurora.org>,
        Jeremy Gebben <jgebben@...eaurora.org>,
        Bryan Huntsman <bryanh@...eaurora.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        Chen Feng <puck.chen@...ilicon.com>,
        Brian Starkey <brian.starkey@....com>
Subject: Re: [PATCHv2 4/4] staging: android: ion: Add ioctl to query
 available heaps

Hi Laura,

[auto build test WARNING on next-20160825]
[cannot apply to staging/staging-testing v4.8-rc4 v4.8-rc3 v4.8-rc2 v4.8-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Laura-Abbott/staging-android-ion-Drop-heap-type-masks/20160902-071022
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609
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
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All warnings (new ones prefixed by >>):

   drivers/staging/android/ion/ion.c: In function 'ion_query_heaps':
>> drivers/staging/android/ion/ion.c:1181:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
      (struct ion_heap_data __user *)query->heaps;
      ^

vim +1181 drivers/staging/android/ion/ion.c

  1165			       __func__);
  1166			dma_buf_put(dmabuf);
  1167			return -EINVAL;
  1168		}
  1169		buffer = dmabuf->priv;
  1170	
  1171		dma_sync_sg_for_device(NULL, buffer->sg_table->sgl,
  1172				       buffer->sg_table->nents, DMA_BIDIRECTIONAL);
  1173		dma_buf_put(dmabuf);
  1174		return 0;
  1175	}
  1176	
  1177	int ion_query_heaps(struct ion_client *client, struct ion_heap_query *query)
  1178	{
  1179		struct ion_device *dev = client->dev;
  1180		struct ion_heap_data __user *buffer =
> 1181			(struct ion_heap_data __user *)query->heaps;
  1182		int ret = -EINVAL, cnt = 0, max_cnt;
  1183		struct ion_heap *heap;
  1184		struct ion_heap_data hdata;
  1185	
  1186		memset(&hdata, 0, sizeof(hdata));
  1187	
  1188		down_read(&dev->lock);
  1189		if (!buffer) {

---
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