RET_SIZE 779 arch/x86/kernel/ftrace.c trampoline = alloc_tramp(size + RET_SIZE + sizeof(void *)); RET_SIZE 783 arch/x86/kernel/ftrace.c *tramp_size = size + RET_SIZE + sizeof(void *); RET_SIZE 795 arch/x86/kernel/ftrace.c ret = probe_kernel_read(ip, (void *)retq, RET_SIZE); RET_SIZE 807 arch/x86/kernel/ftrace.c ptr = (unsigned long *)(trampoline + size + RET_SIZE);