Hi Rob, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e commit: 0ae349a0f33fb040a2bc228fdc6d60111455feab iommu/qcom: Add qcom_iommu date: 5 weeks ago config: m32r-allmodconfig (attached as .config) compiler: m32r-linux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 0ae349a0f33fb040a2bc228fdc6d60111455feab # save the attached .config to linux build tree make.cross ARCH=m32r All errors (new ones prefixed by >>): In file included from drivers//iommu/io-pgtable-arm.c:23:0: drivers//iommu/io-pgtable-arm.c: In function 'arm_lpae_install_table': >> include/linux/atomic.h:475:29: error: implicit declaration of function >> 'cmpxchg64' [-Werror=implicit-function-declaration] #define cmpxchg64_relaxed cmpxchg64 ^ drivers//iommu/io-pgtable-arm.c:341:8: note: in expansion of macro 'cmpxchg64_relaxed' old = cmpxchg64_relaxed(ptep, curr, new); ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from drivers/iommu/io-pgtable-arm.c:23:0: drivers/iommu/io-pgtable-arm.c: In function 'arm_lpae_install_table': >> include/linux/atomic.h:475:29: error: implicit declaration of function >> 'cmpxchg64' [-Werror=implicit-function-declaration] #define cmpxchg64_relaxed cmpxchg64 ^ drivers/iommu/io-pgtable-arm.c:341:8: note: in expansion of macro 'cmpxchg64_relaxed' old = cmpxchg64_relaxed(ptep, curr, new); ^~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/cmpxchg64 +475 include/linux/atomic.h 654672d4 Will Deacon 2015-08-06 472 654672d4 Will Deacon 2015-08-06 473 /* cmpxchg64_relaxed */ 654672d4 Will Deacon 2015-08-06 474 #ifndef cmpxchg64_relaxed 654672d4 Will Deacon 2015-08-06 @475 #define cmpxchg64_relaxed cmpxchg64 654672d4 Will Deacon 2015-08-06 476 #define cmpxchg64_acquire cmpxchg64 654672d4 Will Deacon 2015-08-06 477 #define cmpxchg64_release cmpxchg64 654672d4 Will Deacon 2015-08-06 478 :::::: The code at line 475 was first introduced by commit :::::: 654672d4ba1a6001c365833be895f9477c4d5eab locking/atomics: Add _{acquire|release|relaxed}() variants of some atomic operations :::::: TO: Will Deacon <will.dea...@arm.com> :::::: CC: Ingo Molnar <mi...@kernel.org> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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