linux-kernel - [niks:dma_iommu_v1_wip 16/17] drivers/iommu/dma-iommu.c:199:5: warning: no previous prototype for 'iommu_dma_init

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Date:   Mon, 17 Oct 2022 17:15:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [niks:dma_iommu_v1_wip 16/17] drivers/iommu/dma-iommu.c:199:5:
 warning: no previous prototype for 'iommu_dma_init_simple'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/niks/linux.git dma_iommu_v1_wip
head:   9a5696f7858cc6cc7b31414ef978ec47ced67cc5
commit: 4a4a23f90612b2038b9d24fc975438defe255cb1 [16/17] iommu/dma: Add simple batching flush queue implementation
config: x86_64-defconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/niks/linux.git/commit/?id=4a4a23f90612b2038b9d24fc975438defe255cb1
        git remote add niks https://git.kernel.org/pub/scm/linux/kernel/git/niks/linux.git
        git fetch --no-tags niks dma_iommu_v1_wip
        git checkout 4a4a23f90612b2038b9d24fc975438defe255cb1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/iommu/

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

All warnings (new ones prefixed by >>):

>> drivers/iommu/dma-iommu.c:199:5: warning: no previous prototype for 'iommu_dma_init_simple' [-Wmissing-prototypes]
     199 | int iommu_dma_init_simple(struct iommu_dma_cookie *cookie)
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/iommu_dma_init_simple +199 drivers/iommu/dma-iommu.c

   198	
 > 199	int iommu_dma_init_simple(struct iommu_dma_cookie *cookie)
   200	{
   201		struct iova_simple *queue;
   202	
   203		queue = vzalloc(sizeof(*queue) +
   204				IOVA_SIMPLE_SIZE * sizeof(struct iova_simple_entry));
   205		if (!queue)
   206			return -ENOMEM;
   207	
   208		INIT_LIST_HEAD(&queue->freelist);
   209		cookie->fq_timeout = IOVA_SIMPLE_TIMEOUT;
   210		cookie->simple_fq = queue;
   211	
   212		return 0;
   213	}
   214	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

View attachment "config" of type "text/plain" (137849 bytes)