linux-kernel - [tglx-devel:depthtracking 35/38] arch/x86/kernel/callthunks.c:501:9: error: implicit declaration of function 'kprobe_add_area

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Date:   Thu, 14 Jul 2022 21:25:12 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [tglx-devel:depthtracking 35/38] arch/x86/kernel/callthunks.c:501:9:
 error: implicit declaration of function 'kprobe_add_area_blacklist'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git depthtracking
head:   81d2c1b17a61bfeca4b92a5d6e1fb6f5ff464826
commit: 57b6f2ca7edda679f0a9fe58087ecc9dd9f8dafb [35/38] kprobes: Add callthunk blacklisting
config: x86_64-randconfig-a004 (https://download.01.org/0day-ci/archive/20220714/202207142151.EbbJvHp7-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id=57b6f2ca7edda679f0a9fe58087ecc9dd9f8dafb
        git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
        git fetch --no-tags tglx-devel depthtracking
        git checkout 57b6f2ca7edda679f0a9fe58087ecc9dd9f8dafb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   arch/x86/kernel/callthunks.c: In function 'callthunks_init':
>> arch/x86/kernel/callthunks.c:501:9: error: implicit declaration of function 'kprobe_add_area_blacklist' [-Werror=implicit-function-declaration]
     501 |         kprobe_add_area_blacklist(base, base + size);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/kprobe_add_area_blacklist +501 arch/x86/kernel/callthunks.c

   477	
   478	static __init noinline void callthunks_init(struct callthunk_sites *cs)
   479	{
   480		unsigned long base, size;
   481		int ret;
   482	
   483		if (cpu_feature_enabled(X86_FEATURE_CALL_DEPTH)) {
   484			callthunk_desc.template = skl_call_thunk_template;
   485			callthunk_desc.template_size = SKL_TMPL_SIZE;
   486			callthunk_desc.thunk_size = SKL_CALLTHUNK_SIZE;
   487		}
   488	
   489		if (!callthunk_desc.template)
   490			return;
   491	
   492		if (WARN_ON_ONCE(btree_init64(&call_thunks)))
   493			return;
   494	
   495		ret = callthunks_setup(cs, &builtin_layout);
   496		if (WARN_ON_ONCE(ret))
   497			return;
   498	
   499		base = (unsigned long)builtin_layout.base;
   500		size = builtin_layout.size;
 > 501		kprobe_add_area_blacklist(base, base + size);
   502		static_call_force_reinit();
   503		thunks_initialized = true;
   504	}
   505	

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