linux-kernel - [ibft:linux-next 1/1] drivers/firmware/iscsi_ibft.c:868:13: warning: assignment to 'struct acpi_table_ibft *' from 'int' makes pointer from integer without a cast

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Date:   Tue, 3 Aug 2021 14:51:49 +0800
From:   kernel test robot <lkp@...el.com>
To:     Maurizio Lombardi <mlombard@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Konrad Rzeszutek Wilk <konrad@...nel.org>,
        Mike Rapoport <rppt@...ux.ibm.com>
Subject: [ibft:linux-next 1/1] drivers/firmware/iscsi_ibft.c:868:13: warning:
 assignment to 'struct acpi_table_ibft *' from 'int' makes pointer from
 integer without a cast

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft.git linux-next
head:   342f43af70dbc74f8629381998f92c060e1763a2
commit: 342f43af70dbc74f8629381998f92c060e1763a2 [1/1] iscsi_ibft: fix crash due to KASLR physical memory remapping
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 10.3.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft.git/commit/?id=342f43af70dbc74f8629381998f92c060e1763a2
        git remote add ibft https://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft.git
        git fetch --no-tags ibft linux-next
        git checkout 342f43af70dbc74f8629381998f92c060e1763a2
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm64 

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 >>):

   drivers/firmware/iscsi_ibft.c: In function 'ibft_init':
   drivers/firmware/iscsi_ibft.c:868:15: error: implicit declaration of function 'isa_bus_to_virt' [-Werror=implicit-function-declaration]
     868 |   ibft_addr = isa_bus_to_virt(ibft_phys_addr);
         |               ^~~~~~~~~~~~~~~
>> drivers/firmware/iscsi_ibft.c:868:13: warning: assignment to 'struct acpi_table_ibft *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     868 |   ibft_addr = isa_bus_to_virt(ibft_phys_addr);
         |             ^
   cc1: some warnings being treated as errors


vim +868 drivers/firmware/iscsi_ibft.c

   854	
   855	/*
   856	 * ibft_init() - creates sysfs tree entries for the iBFT data.
   857	 */
   858	static int __init ibft_init(void)
   859	{
   860		int rc = 0;
   861	
   862		/*
   863		   As on UEFI systems the setup_arch()/reserve_ibft_region()
   864		   is called before ACPI tables are parsed and it only does
   865		   legacy finding.
   866		*/
   867		if (ibft_phys_addr)
 > 868			ibft_addr = isa_bus_to_virt(ibft_phys_addr);
   869		else
   870			acpi_find_ibft_region();
   871	
   872		if (ibft_addr) {
   873			pr_info("iBFT detected.\n");
   874	
   875			rc = ibft_check_device();
   876			if (rc)
   877				return rc;
   878	
   879			boot_kset = iscsi_boot_create_kset("ibft");
   880			if (!boot_kset)
   881				return -ENOMEM;
   882	
   883			/* Scan the IBFT for data and register the kobjects. */
   884			rc = ibft_register_kobjects(ibft_addr);
   885			if (rc)
   886				goto out_free;
   887		} else
   888			printk(KERN_INFO "No iBFT detected.\n");
   889	
   890		return 0;
   891	
   892	out_free:
   893		ibft_cleanup();
   894		return rc;
   895	}
   896	

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

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