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SubjectRe: [PATCH 3/3] iommu: Enable compile testing for some of drivers
Hi Krzysztof,

I love your patch! Perhaps something to improve:

[auto build test WARNING on iommu/next]
[also build test WARNING on v5.5-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Krzysztof-Kozlowski/iommu-omap-Fix-pointer-cast-Wpointer-to-int-cast-warnings-on-64-bit/20191231-022212
base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 7.5.0
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
GCC_VERSION=7.5.0 make.cross ARCH=ia64

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

In file included from drivers/iommu/omap-iommu.c:33:0:
drivers/iommu/omap-iommu.c: In function 'omap_iommu_iova_to_phys':
>> drivers/iommu/omap-iopgtable.h:44:21: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define IOPTE_MASK (~(IOPTE_SIZE - 1))
^
>> drivers/iommu/omap-iommu.c:1641:41: note: in expansion of macro 'IOPTE_MASK'
ret = omap_iommu_translate(*pte, da, IOPTE_MASK);
^~~~~~~~~~
drivers/iommu/omap-iopgtable.h:51:23: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define IOLARGE_MASK (~(IOLARGE_SIZE - 1))
^
>> drivers/iommu/omap-iommu.c:1643:41: note: in expansion of macro 'IOLARGE_MASK'
ret = omap_iommu_translate(*pte, da, IOLARGE_MASK);
^~~~~~~~~~~~
drivers/iommu/omap-iopgtable.h:27:25: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define IOSECTION_MASK (~(IOSECTION_SIZE - 1))
^
>> drivers/iommu/omap-iommu.c:1649:41: note: in expansion of macro 'IOSECTION_MASK'
ret = omap_iommu_translate(*pgd, da, IOSECTION_MASK);
^~~~~~~~~~~~~~
drivers/iommu/omap-iopgtable.h:34:23: warning: large integer implicitly truncated to unsigned type [-Woverflow]
#define IOSUPER_MASK (~(IOSUPER_SIZE - 1))
^
>> drivers/iommu/omap-iommu.c:1651:41: note: in expansion of macro 'IOSUPER_MASK'
ret = omap_iommu_translate(*pgd, da, IOSUPER_MASK);
^~~~~~~~~~~~

vim +44 drivers/iommu/omap-iopgtable.h

97ec7d585b33bb arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2010-02-15 38
97ec7d585b33bb arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2010-02-15 39 /*
97ec7d585b33bb arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2010-02-15 40 * "small page" address mask and size definitions.
97ec7d585b33bb arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2010-02-15 41 */
a9dcad5e375800 arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2009-01-26 42 #define IOPTE_SHIFT 12
5ff98fa68c88d7 drivers/iommu/omap-iopgtable.h Suman Anna 2015-07-20 43 #define IOPTE_SIZE BIT(IOPTE_SHIFT)
a9dcad5e375800 arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2009-01-26 @44 #define IOPTE_MASK (~(IOPTE_SIZE - 1))
a9dcad5e375800 arch/arm/plat-omap/iopgtable.h Hiroshi DOYU 2009-01-26 45

:::::: The code at line 44 was first introduced by commit
:::::: a9dcad5e375800fcb07f7617dba23b3aade8f09d omap iommu: tlb and pagetable primitives

:::::: TO: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
:::::: CC: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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