x86: Address 'unused' warning in hw_nmi.c again
arch/x86/kernel/apic/hw_nmi.c:29: warning: backtrace_mask defined but not used commit 0e2af2a9(x86, hw_nmi: Move backtrace_mask declaration under ARCH_HAS_NMI_WATCHDOG) addressed this warning, but it was reintroduced by commit 5f2b0ba4(x86, nmi_watchdog: Remove the old nmi_watchdog). Move backtrace_mask into the #ifdef arch_trigger_all_cpu_backtrace section again. Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <AANLkTi=rcc38QzoKa6LFy4m++-p_9=Zt4_kDQE=GeKxf@mail.gmail.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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