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| ^~~~~~~~ vim +/tramp_ud +19 arch/x86/kernel/static_call.c 452cddbff74b6a Peter Zijlstra 2020-08-18 13 7723edf5edfdfd Peter Zijlstra 2022-06-14 14 /* 7723edf5edfdfd Peter Zijlstra 2022-06-14 15 * ud1 %esp, %ecx - a 3 byte #UD that is unique to trampolines, chosen such 7723edf5edfdfd Peter Zijlstra 2022-06-14 16 * that there is no false-positive trampoline identification while also being a 7723edf5edfdfd Peter Zijlstra 2022-06-14 17 * speculation stop. 7723edf5edfdfd Peter Zijlstra 2022-06-14 18 */ 7723edf5edfdfd Peter Zijlstra 2022-06-14 @19 static const u8 tramp_ud[] = { 0x0f, 0xb9, 0xcc }; 7723edf5edfdfd Peter Zijlstra 2022-06-14 20 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki