[linux-next:master 6560/14009] arch/arm/kernel/module-plts.c:26:2: error: use of undeclared identifier 'FTRACE_ADDR'

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   2e0046650f0f192a84a1793f0dc2f0991ed9a3e4
commit: 79f32b221b18c15a98507b101ef4beb52444cc6f [6560/14009] ARM: 9079/1: ftrace: Add MODULE_PLTS support
config: arm-randconfig-r003-20210630 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d21d5472501460933e78aead04cf59579025ba4)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=79f32b221b18c15a98507b101ef4beb52444cc6f
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 79f32b221b18c15a98507b101ef4beb52444cc6f
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> arch/arm/kernel/module-plts.c:26:2: error: use of undeclared identifier 'FTRACE_ADDR'
           FTRACE_ADDR,
           ^
>> arch/arm/kernel/module-plts.c:40:7: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           if (!ARRAY_SIZE(fixed_plts) || pltsec->plt_count)
                ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE'
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
                                  ^~~~~
   arch/arm/kernel/module-plts.c:42:22: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           pltsec->plt_count = ARRAY_SIZE(fixed_plts);
                               ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE'
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
                                  ^~~~~
   arch/arm/kernel/module-plts.c:47:21: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           BUILD_BUG_ON(sizeof(fixed_plts) > sizeof(plt->lit));
                              ^~~~~~~~~~~~
   include/linux/build_bug.h:50:19: note: expanded from macro 'BUILD_BUG_ON'
           BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
                            ^~~~~~~~~
   include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
   #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                                            ^~~~
   include/linux/compiler_types.h:328:22: note: expanded from macro 'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                               ^~~~~~~~~
   include/linux/compiler_types.h:316:23: note: expanded from macro '_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
                                ^~~~~~~~~
   include/linux/compiler_types.h:308:9: note: expanded from macro '__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
   arch/arm/kernel/module-plts.c:48:37: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           memcpy(plt->lit, fixed_plts, sizeof(fixed_plts));
                                              ^~~~~~~~~~~~
   arch/arm/kernel/module-plts.c:65:22: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           for (idx = 0; idx < ARRAY_SIZE(fixed_plts); ++idx)
                               ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE'
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
                                  ^~~~~
   arch/arm/kernel/module-plts.c:217:28: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           unsigned long core_plts = ARRAY_SIZE(fixed_plts);
                                     ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE'
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
                                  ^~~~~
   arch/arm/kernel/module-plts.c:218:28: error: invalid application of 'sizeof' to an incomplete type 'const u32 []'
           unsigned long init_plts = ARRAY_SIZE(fixed_plts);
                                     ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:42:32: note: expanded from macro 'ARRAY_SIZE'
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
                                  ^~~~~
   8 errors generated.


vim +/FTRACE_ADDR +26 arch/arm/kernel/module-plts.c

    23	
    24	static const u32 fixed_plts[] = {
    25	#ifdef CONFIG_FUNCTION_TRACER
  > 26		FTRACE_ADDR,
    27		MCOUNT_ADDR,
    28	#endif
    29	};
    30	
    31	static bool in_init(const struct module *mod, unsigned long loc)
    32	{
    33		return loc - (u32)mod->init_layout.base < mod->init_layout.size;
    34	}
    35	
    36	static void prealloc_fixed(struct mod_plt_sec *pltsec, struct plt_entries *plt)
    37	{
    38		int i;
    39	
  > 40		if (!ARRAY_SIZE(fixed_plts) || pltsec->plt_count)
    41			return;
    42		pltsec->plt_count = ARRAY_SIZE(fixed_plts);
    43	
    44		for (i = 0; i < ARRAY_SIZE(plt->ldr); ++i)
    45			plt->ldr[i] = PLT_ENT_LDR;
    46	
    47		BUILD_BUG_ON(sizeof(fixed_plts) > sizeof(plt->lit));
    48		memcpy(plt->lit, fixed_plts, sizeof(fixed_plts));
    49	}
    50	

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

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