Hi Kay,

Kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git driver-core-linus
head:   e2ae715d66bf4becfb85eb84b7150e23cf27df30
commit: e2ae715d66bf4becfb85eb84b7150e23cf27df30 [6/6] kmsg - kmsg_dump() use iterator to receive log buffer content
config: x86_64-randconfig-usb2 (attached as .config)

All related error/warning messages are:

arch/x86/platform/efi/efi_64.o: In function `kmsg_dump_get_line': efi_64.c:(.text+0x0): multiple definition of `kmsg_dump_get_line'
arch/x86/platform/efi/efi_64.o: In function `kmsg_dump_get_buffer': efi_64.c:(.text+0x8): multiple definition of `kmsg_dump_get_buffer'
arch/x86/platform/efi/efi_64.o: In function `kmsg_dump_rewind': efi_64.c:(.text+0x10): multiple definition of `kmsg_dump_rewind'
arch/x86/kernel/acpi/built-in.o: In function `kmsg_dump_rewind': (.text+0x52): multiple definition of `kmsg_dump_rewind'
arch/x86/kernel/acpi/built-in.o: In function `kmsg_dump_get_buffer': (.text+0x4a): multiple definition of `kmsg_dump_get_buffer'
arch/x86/kernel/acpi/built-in.o: In function `kmsg_dump_get_line': (.text+0x42): multiple definition of `kmsg_dump_get_line'
arch/x86/kernel/reboot.o: In function `kmsg_dump_get_line': reboot.c:(.text+0x1b): multiple definition of `kmsg_dump_get_line'
arch/x86/kernel/reboot.o: In function `kmsg_dump_get_buffer': reboot.c:(.text+0x23): multiple definition of `kmsg_dump_get_buffer'
arch/x86/kernel/reboot.o: In function `kmsg_dump_rewind': reboot.c:(.text+0x2b): multiple definition of `kmsg_dump_rewind'
kernel/printk.o: In function `kmsg_dump_get_line': printk.c:(.text+0xa4): multiple definition of `kmsg_dump_get_line'
kernel/printk.o: In function `kmsg_dump_get_buffer': printk.c:(.text+0xac): multiple definition of `kmsg_dump_get_buffer'
kernel/printk.o: In function `kmsg_dump_rewind': printk.c:(.text+0xb4): multiple definition of `kmsg_dump_rewind'
kernel/sys.o: In function `kmsg_dump_get_line': sys.c:(.text+0x270): multiple definition of `kmsg_dump_get_line'
kernel/sys.o: In function `kmsg_dump_get_buffer': sys.c:(.text+0x278): multiple definition of `kmsg_dump_get_buffer'
kernel/sys.o: In function `kmsg_dump_rewind': sys.c:(.text+0x280): multiple definition of `kmsg_dump_rewind'
drivers/acpi/apei/built-in.o: In function `kmsg_dump_rewind': (.text+0x10f8): multiple definition of `kmsg_dump_rewind'
drivers/acpi/apei/built-in.o: In function `kmsg_dump_get_buffer': (.text+0x10f0): multiple definition of `kmsg_dump_get_buffer'
drivers/acpi/apei/built-in.o: In function `kmsg_dump_get_line': (.text+0x10e8): multiple definition of `kmsg_dump_get_line'
block/partitions/msdos.o: In function `kmsg_dump_get_line': msdos.c:(.text+0x2b4): multiple definition of `kmsg_dump_get_line'
block/partitions/msdos.o: In function `kmsg_dump_get_buffer': msdos.c:(.text+0x2bc): multiple definition of `kmsg_dump_get_buffer'
block/partitions/msdos.o: In function `kmsg_dump_rewind': msdos.c:(.text+0x2c4): multiple definition of `kmsg_dump_rewind'
fs/pstore/platform.o: In function `kmsg_dump_get_line': platform.c:(.text+0x3f): multiple definition of `kmsg_dump_get_line'
fs/pstore/platform.o: In function `kmsg_dump_get_buffer': platform.c:(.text+0x47): multiple definition of `kmsg_dump_get_buffer'
fs/pstore/platform.o: In function `kmsg_dump_rewind': platform.c:(.text+0x4f): multiple definition of `kmsg_dump_rewind'

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0-DAY kernel build testing backend         Open Source Technology Centre
Fengguang Wu <wfg@linux.intel.com>                     Intel Corporation