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Subjectfs/xfs/xfs_icache.c:296:1: warning: unused function 'xfs_inew_wait'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: b5013d084e03e82ceeab4db8ae8ceeaebe76b0eb
commit: ab23a7768739a23d21d8a16ca37dff96b1ca957a xfs: per-cpu deferred inode inactivation queues
date: 3 months ago
config: mips-randconfig-r031-20211014 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6c76d0101193aa4eb891a6954ff047eda2f9cf71)
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
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ab23a7768739a23d21d8a16ca37dff96b1ca957a
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ab23a7768739a23d21d8a16ca37dff96b1ca957a
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash fs/xfs/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> fs/xfs/xfs_icache.c:296:1: warning: unused function 'xfs_inew_wait'
xfs_inew_wait(
^
fatal error: error in backend: Nested variants found in inline asm string: ' .set push
.set noat
.set push
.set arch=r4000
.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/cmpxchg.h", .line = 80, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
1: ll $0, $2 # __xchg_asm
.set pop
move $$1, ${3:z}
.set arch=r4000
sc $$1, $1
beqz $$1, 1b
.set pop
'
clang-14: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 14.0.0 (git://gitmirror/llvm_project cefc01fa65a7ebcc10cbf3c3bb2278a6a122deaf)
Target: mipsel-unknown-linux
Thread model: posix
InstalledDir: /opt/cross/clang-cefc01fa65/bin
clang-14: note: diagnostic msg:
Makefile arch block drivers fs include kernel nr_bisected scripts source usr virt


vim +/xfs_inew_wait +296 fs/xfs/xfs_icache.c

ad438c4038968e Dave Chinner 2016-05-18 294
7fdff52623b4df Darrick J. Wong 2021-05-31 295 static inline void
ae2c4ac2dd39b2 Brian Foster 2017-04-26 @296 xfs_inew_wait(
ae2c4ac2dd39b2 Brian Foster 2017-04-26 297 struct xfs_inode *ip)
ae2c4ac2dd39b2 Brian Foster 2017-04-26 298 {
ae2c4ac2dd39b2 Brian Foster 2017-04-26 299 wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_INEW_BIT);
ae2c4ac2dd39b2 Brian Foster 2017-04-26 300 DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_INEW_BIT);
ae2c4ac2dd39b2 Brian Foster 2017-04-26 301
ae2c4ac2dd39b2 Brian Foster 2017-04-26 302 do {
2141713616c652 Ingo Molnar 2017-03-05 303 prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
ae2c4ac2dd39b2 Brian Foster 2017-04-26 304 if (!xfs_iflags_test(ip, XFS_INEW))
ae2c4ac2dd39b2 Brian Foster 2017-04-26 305 break;
ae2c4ac2dd39b2 Brian Foster 2017-04-26 306 schedule();
ae2c4ac2dd39b2 Brian Foster 2017-04-26 307 } while (true);
2141713616c652 Ingo Molnar 2017-03-05 308 finish_wait(wq, &wait.wq_entry);
ae2c4ac2dd39b2 Brian Foster 2017-04-26 309 }
ae2c4ac2dd39b2 Brian Foster 2017-04-26 310

:::::: The code at line 296 was first introduced by commit
:::::: ae2c4ac2dd39b23a87ddb14ceddc3f2872c6aef5 xfs: update ag iterator to support wait on new inodes

:::::: TO: Brian Foster <bfoster@redhat.com>
:::::: CC: Darrick J. Wong <darrick.wong@oracle.com>

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