linux-kernel - Re: [PATCH v3 7/7] dma-buf: system_heap: Add a system-uncached heap re-using the system heap

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Date:   Tue, 6 Oct 2020 05:21:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     John Stultz <john.stultz@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>
Cc:     kbuild-all@...ts.01.org, John Stultz <john.stultz@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Liam Mark <lmark@...eaurora.org>,
        Laura Abbott <labbott@...nel.org>,
        Brian Starkey <Brian.Starkey@....com>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Sandeep Patil <sspatil@...gle.com>,
        Daniel Mentz <danielmentz@...gle.com>
Subject: Re: [PATCH v3 7/7] dma-buf: system_heap: Add a system-uncached heap
 re-using the system heap

Hi John,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linux/master]
[also build test WARNING on tegra-drm/drm/tegra/for-next linus/master v5.9-rc8]
[cannot apply to next-20201002]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/John-Stultz/dma-buf-Performance-improvements-for-system-heap-a-system-uncached-implementation/20201003-120520
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bcf876870b95592b52519ed4aafcf9d95999bc9c
config: i386-randconfig-s032-20201005 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-201-g24bdaac6-dirty
        # https://github.com/0day-ci/linux/commit/553f4e0fafc5b3b4542ea0c7bc21a70fce504c7f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review John-Stultz/dma-buf-Performance-improvements-for-system-heap-a-system-uncached-implementation/20201003-120520
        git checkout 553f4e0fafc5b3b4542ea0c7bc21a70fce504c7f
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

	echo
	echo "sparse warnings: (new ones prefixed by >>)"
	echo
>> drivers/dma-buf/heaps/system_heap.c:25:17: sparse: sparse: symbol 'sys_uncached_heap' was not declared. Should it be static?

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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