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Subjectdrivers/infiniband/core/nldev.c:2187:1: warning: unused function '__chk_RDMA_NL_NLDEV'
Hi Eric,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 002c0aef109067168ae68ee69b5ce67edc2e63c1
commit: 919067cc845f323a80b6fe987b64238bd82d309e net: add CONFIG_PCPU_DEV_REFCNT
date: 5 months ago
config: mips-randconfig-r013-20210821 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 9e9d70591e72fc6762b4b9a226b68ed1307419bf)
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=919067cc845f323a80b6fe987b64238bd82d309e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 919067cc845f323a80b6fe987b64238bd82d309e
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=mips SHELL=/bin/bash drivers/infiniband/core/

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 >>):

>> drivers/infiniband/core/nldev.c:2187:1: warning: unused function '__chk_RDMA_NL_NLDEV'
MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);
^
include/rdma/rdma_netlink.h:33:21: note: expanded from macro 'MODULE_ALIAS_RDMA_NETLINK'
static inline void __chk_##_index(void) ^
<scratch space>:42:1: note: expanded from here
__chk_RDMA_NL_NLDEV
^
fatal error: error in backend: Nested variants found in inline asm string: ' .set push
.set mips64r2
.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/atomic.h", .line = 154, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
1: ll $1, $2 # atomic_fetch_sub
subu $0, $1, $3
sc $0, $2
beqz $0, 1b
.set pop
move $0, $1
'
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 9e9d70591e72fc6762b4b9a226b68ed1307419bf)
Target: mipsel-unknown-linux
Thread model: posix
InstalledDir: /opt/cross/clang-9e9d70591e/bin
clang-14: note: diagnostic msg:
Makefile arch drivers include kernel mm net nr_bisected scripts source usr


vim +/__chk_RDMA_NL_NLDEV +2187 drivers/infiniband/core/nldev.c

e3bf14bdc17a8e Jason Gunthorpe 2017-08-14 2186
e3bf14bdc17a8e Jason Gunthorpe 2017-08-14 @2187 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_NLDEV, 5);

:::::: The code at line 2187 was first introduced by commit
:::::: e3bf14bdc17a8e917f337760cc7cacf3232d7dbc rdma: Autoload netlink client modules

:::::: TO: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
:::::: CC: Doug Ledford <dledford@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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