Hi David, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter-2 head: 7c7521adffeb04466a42e8e1956353b9d9038d02 commit: a1b4b13a5a0037d49005930b50d186d71e07d74b [58/75] afs: Copy local writes to the cache when writing to the server config: x86_64-randconfig-a001-20210908 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/com... git remote add dhowells-fs https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git git fetch --no-tags dhowells-fs fscache-iter-2 git checkout a1b4b13a5a0037d49005930b50d186d71e07d74b # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: fs/afs/write.o: in function `fscache_clear_page_bits': ld: fs/afs/write.o: in function `fscache_write_to_cache': ld: fs/afs/write.o: in function `afs_set_page_dirty': vim +547 include/linux/fscache.h 94d30ae90a00ca David Howells 2013-09-21 542 e29afe6f941d92 David Howells 2020-09-22 543 static inline void fscache_clear_page_bits(struct address_space *mapping, e29afe6f941d92 David Howells 2020-09-22 544 loff_t start, size_t len) e29afe6f941d92 David Howells 2020-09-22 545 { e29afe6f941d92 David Howells 2020-09-22 546 if (fscache_available()) e29afe6f941d92 David Howells 2020-09-22 @547 __fscache_clear_page_bits(mapping, start, len); e29afe6f941d92 David Howells 2020-09-22 548 } e29afe6f941d92 David Howells 2020-09-22 549 e29afe6f941d92 David Howells 2020-09-22 550 static inline void fscache_write_to_cache(struct fscache_cookie *cookie, e29afe6f941d92 David Howells 2020-09-22 551 struct address_space *mapping, e29afe6f941d92 David Howells 2020-09-22 552 loff_t start, size_t len, loff_t i_size, e29afe6f941d92 David Howells 2020-09-22 553 netfs_io_terminated_t term_func, e29afe6f941d92 David Howells 2020-09-22 554 void *term_func_priv) e29afe6f941d92 David Howells 2020-09-22 555 { e29afe6f941d92 David Howells 2020-09-22 556 if (fscache_available()) { e29afe6f941d92 David Howells 2020-09-22 @557 __fscache_write_to_cache(cookie, mapping, start, len, i_size, e29afe6f941d92 David Howells 2020-09-22 558 term_func, term_func_priv); e29afe6f941d92 David Howells 2020-09-22 559 } else { e29afe6f941d92 David Howells 2020-09-22 560 fscache_clear_page_bits(mapping, start, len); e29afe6f941d92 David Howells 2020-09-22 561 if (term_func) e29afe6f941d92 David Howells 2020-09-22 562 term_func(term_func_priv, -ENOBUFS, false); e29afe6f941d92 David Howells 2020-09-22 563 } e29afe6f941d92 David Howells 2020-09-22 564 :::::: The code at line 547 was first introduced by commit :::::: e29afe6f941d92e05bfaf15c9fcb4fbc4760244f fscache: Add support for writing to the cache :::::: TO: David Howells <dhowells(a)redhat.com&gt; :::::: CC: David Howells <dhowells(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org