linux-kernel - Re: [PATCH] efi: Free existing memory map before installing new memory map

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Message-ID: <201806261057.fHkkAzYy%fengguang.wu@intel.com>
Date:   Tue, 26 Jun 2018 11:15:23 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Sai Praneeth Prakhya <sai.praneeth.prakhya@...el.com>
Cc:     kbuild-all@...org, linux-efi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Sai Praneeth <sai.praneeth.prakhya@...el.com>,
        Lee Chun-Yi <jlee@...e.com>, Borislav Petkov <bp@...en8.de>,
        Dave Young <dyoung@...hat.com>,
        Laszlo Ersek <lersek@...hat.com>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        Ricardo Neri <ricardo.neri@...el.com>,
        Ravi Shankar <ravi.v.shankar@...el.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH] efi: Free existing memory map before installing new
 memory map

Hi Sai,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.18-rc2 next-20180625]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Sai-Praneeth-Prakhya/efi-Free-existing-memory-map-before-installing-new-memory-map/20180626-104301
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/firmware//efi/memmap.c: In function 'efi_memmap_install':
>> drivers/firmware//efi/memmap.c:199:2: error: implicit declaration of function 'efi_memmap_free'; did you mean 'vmemmap_free'? [-Werror=implicit-function-declaration]
     efi_memmap_free(efi.memmap.phys_map, efi.memmap.nr_map, efi.memmap.late);
     ^~~~~~~~~~~~~~~
     vmemmap_free
   cc1: some warnings being treated as errors

vim +199 drivers/firmware//efi/memmap.c

   180	
   181	/**
   182	 * efi_memmap_install - Install a new EFI memory map in efi.memmap
   183	 * @addr: Physical address of the memory map
   184	 * @nr_map: Number of entries in the memory map
   185	 *
   186	 * Unlike efi_memmap_init_*(), this function does not allow the caller
   187	 * to switch from early to late mappings. It simply uses the existing
   188	 * mapping function and installs the new memmap.
   189	 *
   190	 * Returns zero on success, a negative error code on failure.
   191	 */
   192	int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map)
   193	{
   194		struct efi_memory_map_data data;
   195	
   196		efi_memmap_unmap();
   197	
   198		/* Free the memory allocated to the existing memory map */
 > 199		efi_memmap_free(efi.memmap.phys_map, efi.memmap.nr_map, efi.memmap.late);
   200	
   201		data.phys_map = addr;
   202		data.size = efi.memmap.desc_size * nr_map;
   203		data.desc_version = efi.memmap.desc_version;
   204		data.desc_size = efi.memmap.desc_size;
   205	
   206		return __efi_memmap_init(&data, efi.memmap.late);
   207	}
   208	

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