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Subject[linux-rt-devel:linux-5.13.y-rt-testing 57/226] mm/slub.c:376:1: warning: unused function 'slab_lock'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.13.y-rt-testing
head: 2eb9270f1294b849cb310d6fb1f2675dfb3f9c75
commit: dde8c73f2bd04af94cef72c96424d776537170af [57/226] mm, slub: optionally save/restore irqs in slab_[un]lock()/
config: mips-randconfig-r032-20210709 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe)
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/rt/linux-rt-devel.git/commit/?id=dde8c73f2bd04af94cef72c96424d776537170af
git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
git fetch --no-tags linux-rt-devel linux-5.13.y-rt-testing
git checkout dde8c73f2bd04af94cef72c96424d776537170af
# 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

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 >>):

>> mm/slub.c:376:1: warning: unused function 'slab_lock'
slab_lock(struct page unsigned long
^
>> mm/slub.c:381:29: warning: unused function 'slab_unlock'
static __always_inline void slab_unlock(struct page unsigned long
^
mm/slub.c:1507:29: warning: unused function 'node_nr_slabs'
static inline unsigned long node_nr_slabs(struct kmem_cache_node
^
mm/slub.c:1525:21: warning: unused function 'kmalloc_large_node_hook'
static inline void size_t size, gfp_t flags)
^
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/bitops.h", .line = 105, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif
1: ll $0, $1
or $0, $2
sc $0, $1
beqz $0, 1b
.set pop
'
clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 13.0.0 (git://gitmirror/llvm_project 8d69635ed9ecf36fd0ca85906bfde17949671cbe)
Target: mipsel-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/cross/clang-8d69635ed9/bin
clang-13: note: diagnostic msg:
Makefile arch block certs crypto drivers fs include init ipc kernel lib mm samples scripts security sound source usr virt


vim +/slab_lock +376 mm/slub.c

374
375 static __always_inline void
> 376 slab_lock(struct page *page, unsigned long *flags)
377 {
378 __slab_lock(page, flags, false);
379 }
380
> 381 static __always_inline void slab_unlock(struct page *page, unsigned long *flags)
382 {
383 __slab_unlock(page, flags, false);
384 }
385

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