Re: [PATCH 1/3] drm/ttm: move swapout logic around v2

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Hi "Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-tip/drm-tip]
[also build test ERROR on next-20210318]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next linus/master v5.12-rc3]
[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/Christian-K-nig/drm-ttm-move-swapout-logic-around-v2/20210318-204848
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-randconfig-a005-20210318 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6db3ab2903f42712f44000afb5aa467efbd25f35)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/a454d56ea061b53d24a62a700743e4508dd6c9b1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Christian-K-nig/drm-ttm-move-swapout-logic-around-v2/20210318-204848
        git checkout a454d56ea061b53d24a62a700743e4508dd6c9b1
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/ttm/ttm_device.c:109:5: error: conflicting types for 'ttm_global_swapout'
   int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
       ^
   include/drm/ttm/ttm_device.h:300:6: note: previous declaration is here
   long ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags);
        ^
   1 error generated.


vim +/ttm_global_swapout +109 drivers/gpu/drm/ttm/ttm_device.c

   104	
   105	/**
   106	 * A buffer object shrink method that tries to swap out the first
   107	 * buffer object on the global::swap_lru list.
   108	 */
 > 109	int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags)
   110	{
   111		struct ttm_global *glob = &ttm_glob;
   112		struct ttm_buffer_object *bo;
   113		unsigned i;
   114		int ret;
   115	
   116		spin_lock(&glob->lru_lock);
   117		for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
   118			list_for_each_entry(bo, &glob->swap_lru[i], swap) {
   119				uint32_t num_pages = bo->ttm->num_pages;
   120	
   121				ret = ttm_bo_swapout(bo, ctx, gfp_flags);
   122				/* ttm_bo_swapout has dropped the lru_lock */
   123				if (!ret)
   124					return num_pages;
   125				if (ret != -EBUSY)
   126					return ret;
   127			}
   128		}
   129		spin_unlock(&glob->lru_lock);
   130		return 0;
   131	}
   132	EXPORT_SYMBOL(ttm_global_swapout);
   133	

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

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