linux-kernel - Re: [PATCH bpf 3/4] module: introduce module_alloc

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Date:   Fri, 22 Apr 2022 17:48:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     Song Liu <song@...nel.org>, bpf@...r.kernel.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, ast@...nel.org, daniel@...earbox.net,
        kernel-team@...com, akpm@...ux-foundation.org,
        rick.p.edgecombe@...el.com, hch@...radead.org,
        imbrenda@...ux.ibm.com, mcgrof@...nel.org,
        Song Liu <song@...nel.org>
Subject: Re: [PATCH bpf 3/4] module: introduce module_alloc_huge

Hi Song,

I love your patch! Yet something to improve:

[auto build test ERROR on bpf/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Song-Liu/bpf_prog_pack-and-vmalloc-on-huge-page-fixes/20220422-133605
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
config: x86_64-randconfig-a004 (https://download.01.org/0day-ci/archive/20220422/202204221700.93ehQrzU-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/8a0dfde5aef7e95487be2f6e3ff9487d79a30714
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Song-Liu/bpf_prog_pack-and-vmalloc-on-huge-page-fixes/20220422-133605
        git checkout 8a0dfde5aef7e95487be2f6e3ff9487d79a30714
        # 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 as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   arch/x86/kernel/module.c: In function 'module_alloc_huge':
>> arch/x86/kernel/module.c:100:54: error: 'VM_ALLOW_HUGE_VMAP' undeclared (first use in this function); did you mean 'VM_NO_HUGE_VMAP'?
     100 |                                  VM_DEFER_KMEMLEAK | VM_ALLOW_HUGE_VMAP,
         |                                                      ^~~~~~~~~~~~~~~~~~
         |                                                      VM_NO_HUGE_VMAP
   arch/x86/kernel/module.c:100:54: note: each undeclared identifier is reported only once for each function it appears in


vim +100 arch/x86/kernel/module.c

    88	
    89	void *module_alloc_huge(unsigned long size)
    90	{
    91		gfp_t gfp_mask = GFP_KERNEL;
    92		void *p;
    93	
    94		if (PAGE_ALIGN(size) > MODULES_LEN)
    95			return NULL;
    96	
    97		p = __vmalloc_node_range(size, MODULE_ALIGN,
    98					 MODULES_VADDR + get_module_load_offset(),
    99					 MODULES_END, gfp_mask, PAGE_KERNEL,
 > 100					 VM_DEFER_KMEMLEAK | VM_ALLOW_HUGE_VMAP,
   101					 NUMA_NO_NODE, __builtin_return_address(0));
   102		if (p && (kasan_alloc_module_shadow(p, size, gfp_mask) < 0)) {
   103			vfree(p);
   104			return NULL;
   105		}
   106	
   107		return p;
   108	}
   109	

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