page-writeback.c:(.text+0x6446): undefined reference to `____ilog2_NaN'

writeback-dirty-throttling-v7

$ rm -f mm/page-writeback.o
$ make mm/page-writeback.o 
make -C /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none O=/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/. mm/page-writeback.o
  Using /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none as source for kernel
  GEN     /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/Makefile
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/scripts/checksyscalls.sh
  CC      mm/page-writeback.o
/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/mm/page-writeback.c: In function ‘balance_dirty_pages.clone.9’:
/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/mm/page-writeback.c:1134:16: warning: ‘bdi_dirty’ may be used uninitialized in this function
/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/mm/page-writeback.c:1138:16: warning: ‘base_bw’ may be used uninitialized in this function
/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/mm/page-writeback.c:1139:16: warning: ‘period’ may be used uninitialized in this function
/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/mm/page-writeback.c:1141:16: warning: ‘pause_max’ may be used uninitialized in this function


$ rm -f mm/built-in.o
$ make mm/built-in.o
make -C /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none O=/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/. mm/built-in.o
  Using /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none as source for kernel
  GEN     /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/Makefile
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  UPD     include/generated/compile.h
  CC      init/version.o
  LD      init/built-in.o
  VDSOSYM arch/x86/vdso/vdso32-int80-syms.lds
  VDSOSYM arch/x86/vdso/vdso32-sysenter-syms.lds
  VDSOSYM arch/x86/vdso/vdso32-syms.lds
  LD      arch/x86/vdso/built-in.o
  LD      arch/x86/built-in.o
WARNING: arch/x86/built-in.o(.text+0x1cac8): Section mismatch in reference from the function native_pagetable_reserve() to the function .init.text:memblock_x86_reserve_range()
The function native_pagetable_reserve() references
the function __init memblock_x86_reserve_range().
This is often because native_pagetable_reserve lacks a __init 
annotation or the annotation of memblock_x86_reserve_range is wrong.

  LD      mm/built-in.o


$ make
make -C /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none O=/home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/. 
  Using /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none as source for kernel
  GEN     /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/build_i386_none_686-small/Makefile
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  CALL    /home/sd/src/linux-2.6/linux-2.6.39-rc3/debian/build/source_i386_none/scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  VDSOSYM arch/x86/vdso/vdso32-int80-syms.lds
  VDSOSYM arch/x86/vdso/vdso32-sysenter-syms.lds
  VDSOSYM arch/x86/vdso/vdso32-syms.lds
  LD      arch/x86/vdso/built-in.o
  LD      arch/x86/built-in.o
WARNING: arch/x86/built-in.o(.text+0x1cac8): Section mismatch in reference from the function native_pagetable_reserve() to the function .init.text:memblock_x86_reserve_range()
The function native_pagetable_reserve() references
the function __init memblock_x86_reserve_range().
This is often because native_pagetable_reserve lacks a __init 
annotation or the annotation of memblock_x86_reserve_range is wrong.

  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0x1cf58): Section mismatch in reference from the function native_pagetable_reserve() to the function .init.text:memblock_x86_reserve_range()
The function native_pagetable_reserve() references
the function __init memblock_x86_reserve_range().
This is often because native_pagetable_reserve lacks a __init 
annotation or the annotation of memblock_x86_reserve_range is wrong.

  GEN     .version
  CHK     include/generated/compile.h
  UPD     include/generated/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
  KSYM    .tmp_kallsyms1.S
  AS      .tmp_kallsyms1.o
  LD      .tmp_vmlinux2
  KSYM    .tmp_kallsyms2.S
  AS      .tmp_kallsyms2.o
  LD      vmlinux
  SYSMAP  System.map
  SYSMAP  .tmp_System.map
  VOFFSET arch/x86/boot/voffset.h
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  AS      arch/x86/boot/header.o
  CC      arch/x86/boot/version.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  OBJCOPY arch/x86/boot/vmlinux.bin
  BUILD   arch/x86/boot/bzImage
Root device is (8, 5)
Setup is 13244 bytes (padded to 13312 bytes).
System is 2443 kB
CRC 11d0b5c7
Kernel: arch/x86/boot/bzImage is ready  (#2)
  Building modules, stage 2.
  MODPOST 293 modules
^Cmake[3]: *** [__modpost] Unterbrechung