* Re: [PATCH V3 04/21] dax: Add dax_operations for use by fs-dax on fsdev dax
[not found] <20260107153332.64727-5-john@groves.net>
@ 2026-01-08 17:55 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-01-08 17:55 UTC (permalink / raw)
To: John Groves, Miklos Szeredi, Dan Williams, Bernd Schubert,
Alison Schofield
Cc: llvm, oe-kbuild-all, Jonathan Corbet, Vishal Verma, Dave Jiang,
Matthew Wilcox, Jan Kara, Alexander Viro, David Hildenbrand,
Christian Brauner, Darrick J . Wong, Randy Dunlap, Jeff Layton,
Amir Goldstein, Jonathan Cameron, Stefan Hajnoczi, Joanne Koong,
Josef Bacik, Bagas Sanjaya, Chen Linxuan, James Morse, Fuad Tabba,
Sean Christopherson, Shivank Garg, Ackerley Tng, Gregory Price,
Aravind Ramesh
Hi John,
kernel test robot noticed the following build errors:
[auto build test ERROR on brauner-vfs/vfs.all]
[also build test ERROR on linus/master v6.19-rc4 next-20260108]
[cannot apply to mszeredi-fuse/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/John-Groves/dax-add-fsdev-c-driver-for-fs-dax-on-character-dax/20260108-013232
base: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link: https://lore.kernel.org/r/20260107153332.64727-5-john%40groves.net
patch subject: [PATCH V3 04/21] dax: Add dax_operations for use by fs-dax on fsdev dax
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260108/202601081822.Ww7CSgov-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260108/202601081822.Ww7CSgov-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601081822.Ww7CSgov-lkp@intel.com/
All errors (new ones prefixed by >>):
>> drivers/dax/fsdev.c:97:9: error: call to undeclared function '_copy_from_iter_flushcache'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
97 | return _copy_from_iter_flushcache(addr, bytes, i);
| ^
drivers/dax/fsdev.c:97:9: note: did you mean '__copy_from_user_flushcache'?
arch/x86/include/asm/uaccess_64.h:166:1: note: '__copy_from_user_flushcache' declared here
166 | __copy_from_user_flushcache(void *dst, const void __user *src, unsigned size)
| ^
1 error generated.
vim +/_copy_from_iter_flushcache +97 drivers/dax/fsdev.c
93
94 static size_t fsdev_dax_recovery_write(struct dax_device *dax_dev, pgoff_t pgoff,
95 void *addr, size_t bytes, struct iov_iter *i)
96 {
> 97 return _copy_from_iter_flushcache(addr, bytes, i);
98 }
99
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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