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    Subject[patch, -rc6] x86_64: UP build fixes
    Subject: x86_64: UP build fixes
    From: Ingo Molnar <mingo@elte.hu>

    x86_64 does not build cleanly on UP:

    arch/x86_64/kernel/vsyscall.c: In function 'cpu_vsyscall_notifier':
    arch/x86_64/kernel/vsyscall.c:282: warning: implicit declaration of function 'smp_call_function_single'
    arch/x86_64/kernel/vsyscall.c: At top level:
    arch/x86_64/kernel/vsyscall.c:279: warning: 'cpu_vsyscall_notifier' defined but not used

    this patch fixes it.

    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    ---
    include/asm-x86_64/smp.h | 11 ++---------
    include/linux/cpu.h | 2 +-
    include/linux/smp.h | 9 +++++++++
    3 files changed, 12 insertions(+), 10 deletions(-)

    Index: linux/include/asm-x86_64/smp.h
    ===================================================================
    --- linux.orig/include/asm-x86_64/smp.h
    +++ linux/include/asm-x86_64/smp.h
    @@ -115,16 +115,9 @@ static __inline int logical_smp_processo
    }

    #ifdef CONFIG_SMP
    -#define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
    +# define cpu_physical_id(cpu) x86_cpu_to_apicid[cpu]
    #else
    -#define cpu_physical_id(cpu) boot_cpu_id
    -static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
    - void *info, int retry, int wait)
    -{
    - /* Disable interrupts here? */
    - func(info);
    - return 0;
    -}
    +# define cpu_physical_id(cpu) boot_cpu_id
    #endif /* !CONFIG_SMP */
    #endif

    Index: linux/include/linux/cpu.h
    ===================================================================
    --- linux.orig/include/linux/cpu.h
    +++ linux/include/linux/cpu.h
    @@ -81,7 +81,7 @@ int cpu_down(unsigned int cpu);
    #define lock_cpu_hotplug() do { } while (0)
    #define unlock_cpu_hotplug() do { } while (0)
    #define lock_cpu_hotplug_interruptible() 0
    -#define hotcpu_notifier(fn, pri) do { } while (0)
    +#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
    #define register_hotcpu_notifier(nb) do { } while (0)
    #define unregister_hotcpu_notifier(nb) do { } while (0)

    Index: linux/include/linux/smp.h
    ===================================================================
    --- linux.orig/include/linux/smp.h
    +++ linux/include/linux/smp.h
    @@ -100,6 +100,15 @@ static inline void smp_send_reschedule(i
    #define num_booting_cpus() 1
    #define smp_prepare_boot_cpu() do {} while (0)

    +static inline int
    +smp_call_function_single(int cpuid, void (*func) (void *info), void *info,
    + int retry, int wait)
    +{
    + func(info);
    +
    + return 0;
    +}
    +
    #endif /* !SMP */

    /*
    -
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