__use_tsc 45 arch/x86/kernel/tsc.c static DEFINE_STATIC_KEY_FALSE(__use_tsc); __use_tsc 212 arch/x86/kernel/tsc.c if (static_branch_likely(&__use_tsc)) { __use_tsc 1452 arch/x86/kernel/tsc.c static_branch_enable(&__use_tsc);