taglinefilesource code
debugreg150arch/i386/kernel/process.ccurrent->debugreg[i] = 0;
debugreg210arch/i386/kernel/process.cdump->u_debugreg[i] = current->debugreg[i];  
debugreg392arch/i386/kernel/ptrace.ctmp = child->debugreg[addr];
debugreg454arch/i386/kernel/ptrace.cchild->debugreg[addr] = data;
debugreg144arch/mips/kernel/process.cdump->u_debugreg[i] = current->debugreg[i];  
debugreg373arch/mips/kernel/ptrace.ctmp = child->debugreg[addr];
debugreg435arch/mips/kernel/ptrace.cchild->debugreg[addr] = data;
debugreg38include/asm-i386/system.h:"m" (current->debugreg[register]) \
debugreg64include/asm-i386/system.hif(current->debugreg[7]){ \
debugreg148include/linux/sched.hint debugreg[8];  /* Hardware debugging registers */