Re: [PATCH 1/2] iommu/amd: Add support to indicate whether DMA remap support is enabled

From: kernel test robot <lkp@intel.com>
To: Mario Limonciello <mario.limonciello@amd.com>,
	Joerg Roedel <joro@8bytes.org>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: kbuild-all@lists.01.org, Will Deacon <will@kernel.org>,
	Andreas Noever <andreas.noever@gmail.com>,
	Michael Jamet <michael.jamet@intel.com>,
	Yehezkel Bernat <YehezkelShB@gmail.com>,
	"open list:AMD IOMMU (AMD-VI)" <iommu@lists.linux-foundation.org>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:THUNDERBOLT DRIVER" <linux-usb@vger.kernel.org>,
	Mario Limonciello <mario.limonciello@amd.com>
Subject: Re: [PATCH 1/2] iommu/amd: Add support to indicate whether DMA remap support is enabled
Date: Wed, 16 Mar 2022 08:51:16 +0800	[thread overview]
Message-ID: <202203160844.lKviWR1Q-lkp@intel.com> (raw)
In-Reply-To: <20220315162455.5190-1-mario.limonciello@amd.com>

Hi Mario,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on joro-iommu/next]
[also build test ERROR on arm-perf/for-next/perf linus/master v5.17-rc8 next-20220315]
[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/Mario-Limonciello/iommu-amd-Add-support-to-indicate-whether-DMA-remap-support-is-enabled/20220316-002821
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220316/202203160844.lKviWR1Q-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/fa63035401902e438c5ef3213112901a1054c621
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Mario-Limonciello/iommu-amd-Add-support-to-indicate-whether-DMA-remap-support-is-enabled/20220316-002821
        git checkout fa63035401902e438c5ef3213112901a1054c621
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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 >>):

>> drivers/iommu/amd/init.c:3294:6: error: redefinition of 'amd_ivrs_remap_support'
    3294 | bool amd_ivrs_remap_support(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/iommu/amd/init.c:20:
   include/linux/amd-iommu.h:198:20: note: previous definition of 'amd_ivrs_remap_support' was here
     198 | static inline bool amd_ivrs_remap_support(void)
         |                    ^~~~~~~~~~~~~~~~~~~~~~

vim +/amd_ivrs_remap_support +3294 drivers/iommu/amd/init.c

  3284	
  3285	/*
  3286	 * ivrs_remap_support - Is %IOMMU_IVINFO_DMA_REMAP set in IVRS table
  3287	 *
  3288	 * Returns true if the platform has %IOMMU_IVINFO_DMA_REMAP% set in the IOMMU
  3289	 * IVRS IVInfo field.
  3290	 * Presence of this flag indicates to the OS/HV that the IOMMU is used for
  3291	 * Preboot DMA protection and device accessed memory should be remapped after
  3292	 * the OS has loaded.
  3293	 */
> 3294	bool amd_ivrs_remap_support(void)
  3295	{
  3296		return amdr_ivrs_remap_support;
  3297	}
  3298	EXPORT_SYMBOL_GPL(amd_ivrs_remap_support);
  3299	

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