netdev - [vhost:vhost 11/22] drivers//firmware/qemu_fw_cfg.c:380:3: error: implicit declaration of function 'paddr_vmcoreinfo

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Message-ID: <201802011750.UXhfgECe%fengguang.wu@intel.com>
Date:   Thu, 1 Feb 2018 17:47:53 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Marc-André Lureau <marcandre.lureau@...hat.com>
Cc:     kbuild-all@...org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Gabriel Somlo <somlo@....edu>
Subject: [vhost:vhost 11/22] drivers//firmware/qemu_fw_cfg.c:380:3: error:
 implicit declaration of function 'paddr_vmcoreinfo_note'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
head:   9991b95cb712cdd9a40240bde6274d5415476fb5
commit: 860c7fa9d6d433011e82a4f7f896893e914ce4a9 [11/22] fw_cfg: write vmcoreinfo details
config: i386-randconfig-a0-201804 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout 860c7fa9d6d433011e82a4f7f896893e914ce4a9
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/byteorder/little_endian.h:5:0,
                    from arch/x86/include/uapi/asm/byteorder.h:5,
                    from include/asm-generic/bitops/le.h:6,
                    from arch/x86/include/asm/bitops.h:518,
                    from include/linux/bitops.h:38,
                    from include/linux/kernel.h:11,
                    from include/linux/list.h:9,
                    from include/linux/module.h:9,
                    from drivers//firmware/qemu_fw_cfg.c:30:
   drivers//firmware/qemu_fw_cfg.c: In function 'write_vmcoreinfo':
   drivers//firmware/qemu_fw_cfg.c:379:23: error: 'VMCOREINFO_NOTE_SIZE' undeclared (first use in this function)
      .size = cpu_to_le32(VMCOREINFO_NOTE_SIZE),
                          ^
   include/uapi/linux/byteorder/little_endian.h:33:51: note: in definition of macro '__cpu_to_le32'
    #define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
                                                      ^
   drivers//firmware/qemu_fw_cfg.c:379:11: note: in expansion of macro 'cpu_to_le32'
      .size = cpu_to_le32(VMCOREINFO_NOTE_SIZE),
              ^
   drivers//firmware/qemu_fw_cfg.c:379:23: note: each undeclared identifier is reported only once for each function it appears in
      .size = cpu_to_le32(VMCOREINFO_NOTE_SIZE),
                          ^
   include/uapi/linux/byteorder/little_endian.h:33:51: note: in definition of macro '__cpu_to_le32'
    #define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
                                                      ^
   drivers//firmware/qemu_fw_cfg.c:379:11: note: in expansion of macro 'cpu_to_le32'
      .size = cpu_to_le32(VMCOREINFO_NOTE_SIZE),
              ^
>> drivers//firmware/qemu_fw_cfg.c:380:3: error: implicit declaration of function 'paddr_vmcoreinfo_note' [-Werror=implicit-function-declaration]
      .paddr = cpu_to_le64(paddr_vmcoreinfo_note())
      ^
   cc1: some warnings being treated as errors

vim +/paddr_vmcoreinfo_note +380 drivers//firmware/qemu_fw_cfg.c

   360	
   361	#ifdef CONFIG_CRASH_CORE
   362	static ssize_t write_vmcoreinfo(struct device *dev, const struct fw_cfg_file *f)
   363	{
   364		struct vmci {
   365			__le16 host_format;
   366			__le16 guest_format;
   367			__le32 size;
   368			__le64 paddr;
   369		} __packed;
   370		static struct vmci *data;
   371		ssize_t ret;
   372	
   373		data = kmalloc(sizeof(struct vmci), GFP_KERNEL);
   374		if (!data)
   375			return -ENOMEM;
   376	
   377		*data = (struct vmci) {
   378			.guest_format = cpu_to_le16(VMCOREINFO_FORMAT_ELF),
 > 379			.size = cpu_to_le32(VMCOREINFO_NOTE_SIZE),
 > 380			.paddr = cpu_to_le64(paddr_vmcoreinfo_note())
   381		};
   382		/* spare ourself reading host format support for now since we
   383		 * don't know what else to format - host may ignore ours
   384		 */
   385		ret = fw_cfg_write_blob(dev, f->select, data, 0, sizeof(struct vmci));
   386	
   387		kfree(data);
   388		return ret;
   389	}
   390	#endif /* CONFIG_CRASH_CORE */
   391	

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