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    SubjectRe: Current kernel fails to compile with KVM on PowerPC

    On 20.02.2012, at 18:38, Jörg Sommer wrote:

    > Hello Alexander,
    > Alexander Graf hat am Tue 22. Nov, 22:29 (+0100) geschrieben:
    >> On 22.11.2011, at 21:04, Jörg Sommer wrote:
    >>> Jörg Sommer hat am Mon 07. Nov, 20:48 (+0100) geschrieben:
    >>>> I'm trying to build the kernel with the git commit-id
    >>>> 31555213f03bca37d2c02e10946296052f4ecfcd, but it fails
    >>>> CHK include/linux/version.h
    >>>> HOSTCC scripts/mod/modpost.o
    >>>> CHK include/generated/utsrelease.h
    >>>> UPD include/generated/utsrelease.h
    >>>> HOSTLD scripts/mod/modpost
    >>>> GEN include/generated/bounds.h
    >>>> CC arch/powerpc/kernel/asm-offsets.s
    >>>> In file included from arch/powerpc/kernel/asm-offsets.c:59:0:
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h: In function ‘compute_tlbie_rb’:
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:393:10: error: ‘HPTE_V_SECONDARY’ undeclared (first use in this function)
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:393:10: note: each undeclared identifier is reported only once for each function it appears in
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:396:12: error: ‘HPTE_V_1TB_SEG’ undeclared (first use in this function)
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:401:10: error: ‘HPTE_V_LARGE’ undeclared (first use in this function)
    >>>> /home/joerg/git/linux/arch/powerpc/include/asm/kvm_book3s.h:415:2: warning: right shift count >= width of type [enabled by default]
    >>>> make[3]: *** [arch/powerpc/kernel/asm-offsets.s] Fehler 1
    >>>> make[2]: *** [prepare0] Fehler 2
    >>>> make[1]: *** [deb-pkg] Fehler 2
    >>>> make: *** [deb-pkg] Fehler 2
    >>> I'm still having this problem. I can' build
    >>> 6fe4c6d466e95d31164f14b1ac4aefb51f0f4f82. Are there any patches to
    >>> make the kernel builds and do not oops [1] on PowerPC?
    >> The failures above should be fixed by now.
    >>> [1] »kernel BUG at include/linux/kvm_host.h:603!«
    >> This is unfortunately still there. It's because of preemption being
    >> enabled. Please just use CONFIG_PREEMPT_NONE for the time being
    > This doesn't help. I've build with CONFIG_PREEMPT_NONE, but I'm getting
    > this Oops, when I start qemu.

    Could you please try git:// I fixed a bunch of things with preemption since then and it definitely worked for me. If it still fails in that tree, I can try again to reproduce it :).


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