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Subject[dhowells-fs:fscache-iter-2 58/75] include/linux/fscache.h:547: undefined reference to `__fscache_clear_page_bits'
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/commit/?id=a1b4b13a5a0037d49005930b50d186d71e07d74b
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@intel.com>

All errors (new ones prefixed by >>):

ld: fs/afs/write.o: in function `fscache_clear_page_bits':
>> include/linux/fscache.h:547: undefined reference to `__fscache_clear_page_bits'
ld: fs/afs/write.o: in function `fscache_write_to_cache':
>> include/linux/fscache.h:557: undefined reference to `__fscache_write_to_cache'
ld: fs/afs/write.o: in function `afs_set_page_dirty':
>> fs/afs/write.c:27: undefined reference to `fscache_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@redhat.com>
:::::: CC: David Howells <dhowells@redhat.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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