Re: [PATCH 2/2] libbpf: Support repeated legacy kprobes on same function

Hi Qiang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf-next/master]
[also build test ERROR on bpf/master horms-ipvs/master linus/master v5.16-rc7 next-20211224]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Qiang-Wang/libbpf-Use-probe_name-for-legacy-kprobe/20211225-163349
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: i386-randconfig-c001-20211227 (https://download.01.org/0day-ci/archive/20211227/202112272030.W0PW9fN7-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 511726c64d3b6cca66f7c54d457d586aa3129f67)
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
        # https://github.com/0day-ci/linux/commit/4a70a6c46086b85c64cae0b5c67980bd7f73cfeb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Qiang-Wang/libbpf-Use-probe_name-for-legacy-kprobe/20211225-163349
        git checkout 4a70a6c46086b85c64cae0b5c67980bd7f73cfeb
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

libbpf.c:9896:4: error: expected ')'

                    __sync_fetch_and_add(&index, 1));
                    ^
   libbpf.c:9895:10: note: to match this '('
           snprintf(buf, buf_sz, "libbpf_%u_%s_0x%zx_%d", getpid(), kfunc_name, offset
                   ^
   1 error generated.
   make[6]: *** [tools/build/Makefile.build:97: kernel/bpf/preload/libbpf/staticobjs/libbpf.o] Error 1
   make[6]: Target '__build' not remade because of errors.

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