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The sparse tool complains as follows: drivers/iommu/iommu.c:386:5: warning: symbol 'iommu_insert_resv_region' was not declared. Should it be static? drivers/iommu/iommu.c:2182:5: warning: symbol '__iommu_map' was not declared. Should it be static? Those functions are not used outside of iommu.c, so mark them static. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Link: https://lore.kernel.org/r/20200713142542.50294-1-weiyongjun1@huawei.com Signed-off-by: Joerg Roedel <jroedel@suse.de>