Hi Lucas, [auto build test WARNING on drm/drm-next] [also build test WARNING on v4.14-rc2 next-20170929] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Lucas-Stach/drm-etnaviv-remove-iommu-fault-handler/20170930-080416 base: git://people.freedesktop.org/~airlied/linux.git drm-next config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=arm Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/gpu/drm/etnaviv/etnaviv_iommu.c: In function 'etnaviv_iommuv1_domain_alloc': >> drivers/gpu/drm/etnaviv/etnaviv_iommu.c:208:5: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized] if (ret) ^ vim +/ret +208 drivers/gpu/drm/etnaviv/etnaviv_iommu.c a8c21a54 The etnaviv authors 2015-12-03 189 dd34bb96 Lucas Stach 2016-08-16 190 struct iommu_domain *etnaviv_iommuv1_domain_alloc(struct etnaviv_gpu *gpu) a8c21a54 The etnaviv authors 2015-12-03 191 { a8c21a54 The etnaviv authors 2015-12-03 192 struct etnaviv_iommu_domain *etnaviv_domain; a8c21a54 The etnaviv authors 2015-12-03 193 int ret; a8c21a54 The etnaviv authors 2015-12-03 194 a8c21a54 The etnaviv authors 2015-12-03 195 etnaviv_domain = kzalloc(sizeof(*etnaviv_domain), GFP_KERNEL); a8c21a54 The etnaviv authors 2015-12-03 196 if (!etnaviv_domain) a8c21a54 The etnaviv authors 2015-12-03 197 return NULL; a8c21a54 The etnaviv authors 2015-12-03 198 a8c21a54 The etnaviv authors 2015-12-03 199 etnaviv_domain->dev = gpu->dev; a8c21a54 The etnaviv authors 2015-12-03 200 a8c21a54 The etnaviv authors 2015-12-03 201 etnaviv_domain->domain.type = __IOMMU_DOMAIN_PAGING; a8c21a54 The etnaviv authors 2015-12-03 202 etnaviv_domain->domain.ops = &etnaviv_iommu_ops.ops; 13c34fe5 Lucas Stach 2016-06-13 203 etnaviv_domain->domain.pgsize_bitmap = SZ_4K; a8c21a54 The etnaviv authors 2015-12-03 204 etnaviv_domain->domain.geometry.aperture_start = GPU_MEM_START; a8c21a54 The etnaviv authors 2015-12-03 205 etnaviv_domain->domain.geometry.aperture_end = GPU_MEM_START + PT_ENTRIES * SZ_4K - 1; a8c21a54 The etnaviv authors 2015-12-03 206 a8c21a54 The etnaviv authors 2015-12-03 207 ret = __etnaviv_iommu_init(etnaviv_domain); a8c21a54 The etnaviv authors 2015-12-03 @208 if (ret) :::::: The code at line 208 was first introduced by commit :::::: a8c21a5451d831e67b7a6fb910f9ca8bc7b43554 drm/etnaviv: add initial etnaviv DRM driver :::::: TO: The etnaviv authors <dri-devel@xxxxxxxxxxxxxxxxxxxxx> :::::: CC: Lucas Stach <l.stach@xxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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