linux-kernel - [mingo-tip:sched/headers 412/2356] kernel/bpf/core.c:63:6: warning: no previous prototype for 'bpf_jit

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Date:   Tue, 19 Apr 2022 13:14:05 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/headers 412/2356] kernel/bpf/core.c:63:6: warning:
 no previous prototype for 'bpf_jit_dump'

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   af93551cf39027d176f30b9beafc60a4c130998a
commit: 4957b437f054fb9fde9c6bc4a7dae4459ee37f13 [412/2356] headers/uninline: Uninline multi-use function: bpf_jit_dump()
config: x86_64-randconfig-a002-20220418 (https://download.01.org/0day-ci/archive/20220419/202204191314.hODCBp24-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=4957b437f054fb9fde9c6bc4a7dae4459ee37f13
        git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
        git fetch --no-tags mingo-tip sched/headers
        git checkout 4957b437f054fb9fde9c6bc4a7dae4459ee37f13
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ arch/x86/pci/ crypto/ drivers/bus/mhi/host/ drivers/regulator/ fs/crypto/ kernel/bpf/ lib/crypto/ net/bpf/ sound/soc/codecs/

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

All warnings (new ones prefixed by >>):

>> kernel/bpf/core.c:63:6: warning: no previous prototype for 'bpf_jit_dump' [-Wmissing-prototypes]
      63 | void bpf_jit_dump(unsigned int flen, unsigned int proglen, u32 pass, void *image)
         |      ^~~~~~~~~~~~
   kernel/bpf/core.c:1655:12: warning: no previous prototype for 'bpf_probe_read_kernel' [-Wmissing-prototypes]
    1655 | u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
         |            ^~~~~~~~~~~~~~~~~~~~~


vim +/bpf_jit_dump +63 kernel/bpf/core.c

    62	
  > 63	void bpf_jit_dump(unsigned int flen, unsigned int proglen, u32 pass, void *image)
    64	{
    65		pr_err("flen=%u proglen=%u pass=%u image=%pK from=%s pid=%d\n", flen,
    66		       proglen, pass, image, current->comm, task_pid_nr(current));
    67	
    68		if (image)
    69			print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET,
    70				       16, 1, image, proglen, false);
    71	}
    72	

-- 
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