Messages in this thread | | | Subject | Re: [kbuild-all] Re: include/linux/atomic/atomic-arch-fallback.h:60:32: error: implicit declaration of function 'arch_cmpxchg64'; did you mean 'arch_cmpxchg'? | From | "Chen, Rong A" <> | Date | Tue, 14 Sep 2021 08:39:36 +0800 |
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On 9/13/2021 4:57 PM, Mark Rutland wrote: > On Sun, Sep 12, 2021 at 04:24:21AM +0800, kernel test robot wrote: >> Hi Mark, >> >> FYI, the error/warning still remains. > > As pointed out previously [1,2], this is an existing bug (in that arc > does not have an implementation of cmpxchg64(), but it's possible to > select code which uses it in test configurations). My changes to the > core atomic headers only change the way in which the error manifests, > and have nothing to do with the underlying problem. > > I thought we were going to stop reporting this [3]?
Hi Mark,
Thanks for the feedback, we only ignored the below one:
include/linux/atomic-arch-fallback.h:60:32: error: implicit declaration of function 'arch_cmpxchg64'; did you mean 'arch_cmpxchg'? [-Werror=implicit-function-declaration]
we'll update the pattern to ignore all.
Best Regards, Rong Chen
> > If we want to "fix" this kernel side, then we either need to: > > * Implement cmpxchg64() for arc > > * Add an ARCH_HAS_CMPXCHG64, and dependencies in kconfig where it is used > > Thanks, > Mark. > > [1] https://lore.kernel.org/lkml/a38e3284-62ee-4894-0475-2668733c5903@infradead.org/ > [2] https://lore.kernel.org/lkml/20210712143151.GB94622@C02TD0UTHF1T.local/ > [3] https://lore.kernel.org/lkml/717d9f89-078b-1698-46fb-9b3393ecddc4@intel.com/ > >> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master >> head: c605c39677b9842b0566013e0cf30bc13e90bdbc >> commit: e3d18cee258b898017b298b5b93f8134dd62aee3 locking/atomic: centralize generated headers >> date: 8 weeks ago >> config: arc-allyesconfig (attached as .config) >> compiler: arceb-elf-gcc (GCC) 11.2.0 >> 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 >> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e3d18cee258b898017b298b5b93f8134dd62aee3 >> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git >> git fetch --no-tags linus master >> git checkout e3d18cee258b898017b298b5b93f8134dd62aee3 >> # save the attached .config to linux build tree >> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc >> >> If you fix the issue, kindly add following tag as appropriate >> Reported-by: kernel test robot <lkp@intel.com> >> >> All errors (new ones prefixed by >>): >> >> In file included from include/linux/atomic.h:80, >> from drivers/iommu/io-pgtable-arm.c:12: >> drivers/iommu/io-pgtable-arm.c: In function 'arm_lpae_install_table': >>>> include/linux/atomic/atomic-arch-fallback.h:60:32: error: implicit declaration of function 'arch_cmpxchg64'; did you mean 'arch_cmpxchg'? [-Werror=implicit-function-declaration] >> 60 | #define arch_cmpxchg64_relaxed arch_cmpxchg64 >> | ^~~~~~~~~~~~~~ >> include/linux/atomic/atomic-instrumented.h:1261:9: note: in expansion of macro 'arch_cmpxchg64_relaxed' >> 1261 | arch_cmpxchg64_relaxed(__ai_ptr, __VA_ARGS__); \ >> | ^~~~~~~~~~~~~~~~~~~~~~ >> drivers/iommu/io-pgtable-arm.c:320:15: note: in expansion of macro 'cmpxchg64_relaxed' >> 320 | old = cmpxchg64_relaxed(ptep, curr, new); >> | ^~~~~~~~~~~~~~~~~ >> cc1: some warnings being treated as errors >> >> >> vim +60 include/linux/atomic/atomic-arch-fallback.h >> >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 56 >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 57 #ifndef arch_cmpxchg64_relaxed >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 58 #define arch_cmpxchg64_acquire arch_cmpxchg64 >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 59 #define arch_cmpxchg64_release arch_cmpxchg64 >> 29f006fdefe6f8 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-08-29 @60 #define arch_cmpxchg64_relaxed arch_cmpxchg64 >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 61 #else /* arch_cmpxchg64_relaxed */ >> 37f8173dd84936 include/linux/atomic-arch-fallback.h Peter Zijlstra 2020-01-24 62 >> >> :::::: The code at line 60 was first introduced by commit >> :::::: 29f006fdefe6f88abde973a0b0f20d2704e93fd4 asm-generic/atomic: Add try_cmpxchg() fallbacks >> >> :::::: TO: Peter Zijlstra <peterz@infradead.org> >> :::::: CC: Ingo Molnar <mingo@kernel.org> >> >> --- >> 0-DAY CI Kernel Test Service, Intel Corporation >> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org > > _______________________________________________ > kbuild-all mailing list -- kbuild-all@lists.01.org > To unsubscribe send an email to kbuild-all-leave@lists.01.org >
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