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    SubjectREGRESSION: x86 vDSO: remove vdso-syms.o
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    Date
    I started getting following linking error on amd64 after the 2.6.25
    patch floodgates were opened:
    [snip]
    CHK include/linux/compile.h
    UPD include/linux/compile.h
    CC init/version.o
    LD init/built-in.o
    LD .tmp_vmlinux1
    arch/x86/vdso/built-in.o: In function `init_vdso_vars':
    vma.c:(.init.text+0x170): undefined reference to `VDSO64_vgetcpu_mode'
    vma.c:(.init.text+0x1a3): undefined reference to `VDSO64_vsyscall_gtod_data'
    vma.c:(.init.text+0x1aa): undefined reference to `VDSO64_vgetcpu_mode'
    vma.c:(.init.text+0x1d8): undefined reference to `VDSO64_vsyscall_gtod_data'
    make: *** [.tmp_vmlinux1] Error 1

    Bisecting turned up following commit:
    2b9c97e16101e8dc2b0810d6f932d475a051d785 is first bad commit
    commit 2b9c97e16101e8dc2b0810d6f932d475a051d785
    Author: Roland McGrath <roland@redhat.com>
    Date: Wed Jan 30 13:30:41 2008 +0100

    x86 vDSO: remove vdso-syms.o

    Get rid of vdso-syms.o from the kernel link. We don't need it any more.

    Signed-off-by: Roland McGrath <roland@redhat.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


    To test get the error, just disable 32 bit emulation (IA32_EMULATION)

    Cheers,
    Priit ;)
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