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    Subject[tip:x86/debug] x86: Fix the 32-bit stackoverflow-debug build
    Commit-ID:  53b5650273fea486ac8ac6c1d1e9a6cd17aa31ca
    Gitweb: http://git.kernel.org/tip/53b5650273fea486ac8ac6c1d1e9a6cd17aa31ca
    Author: Ingo Molnar <mingo@elte.hu>
    AuthorDate: Mon, 5 Dec 2011 12:25:44 +0100
    Committer: Ingo Molnar <mingo@elte.hu>
    CommitDate: Mon, 5 Dec 2011 12:25:44 +0100

    x86: Fix the 32-bit stackoverflow-debug build

    The panic_on_stackoverflow variable needs to be avilable
    on the 32-bit side as well ...

    Cc: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com>
    Cc: Randy Dunlap <rdunlap@xenotime.net>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Link: http://lkml.kernel.org/r/20111129060836.11076.12323.stgit@ltc219.sdl.hitachi.co.jp
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    ---
    arch/x86/kernel/irq_32.c | 3 +++
    1 files changed, 3 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
    index e16e99eb..40fc861 100644
    --- a/arch/x86/kernel/irq_32.c
    +++ b/arch/x86/kernel/irq_32.c
    @@ -28,6 +28,9 @@ DEFINE_PER_CPU(struct pt_regs *, irq_regs);
    EXPORT_PER_CPU_SYMBOL(irq_regs);

    #ifdef CONFIG_DEBUG_STACKOVERFLOW
    +
    +int sysctl_panic_on_stackoverflow __read_mostly;
    +
    /* Debugging check for stack overflow: is there less than 1KB free? */
    static int check_stack_overflow(void)
    {

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