[tip:WIP.x86/ipi 8/11] arch/x86/kernel/apic/ipi.c:48:6: error: redefinition of 'apic_smt_update'

[kbuild test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/ipi
head:   0663387727c00bb25ce1e76f30deb6b193f591f8
commit: b3b483a0796da8f2c0d91b8594ef0ae593ec29fb [8/11] x86/apic: Add static key to Control IPI shorthands
config: x86_64-randconfig-x015-201924 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout b3b483a0796da8f2c0d91b8594ef0ae593ec29fb
        # save the attached .config to linux build tree
        make ARCH=x86_64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> arch/x86/kernel/apic/ipi.c:48:6: error: redefinition of 'apic_smt_update'
    void apic_smt_update(void)
         ^~~~~~~~~~~~~~~
   In file included from arch/x86/include/asm/smp.h:13:0,
                    from arch/x86/kernel/apic/ipi.c:13:
   arch/x86/include/asm/apic.h:72:20: note: previous definition of 'apic_smt_update' was here
    static inline void apic_smt_update(void) {}
                       ^~~~~~~~~~~~~~~

vim +/apic_smt_update +48 arch/x86/kernel/apic/ipi.c

    47	
  > 48	void apic_smt_update(void)
    49	{
    50		if (!cpumask_equal(cpu_present_mask, &cpus_booted_once_mask))
    51			static_branch_disable(&apic_use_ipi_shorthand);
    52		else if (!apic_ipi_shorthand_off)
    53			static_branch_enable(&apic_use_ipi_shorthand);
    54	}
    55	

---
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