taglinefilesource code
esp0118include/linux/sched.hunsigned long  esp0;
esp0139kernel/fork.cp->tss.esp0 = PAGE_SIZE + p->kernel_stack_page;
esp055kernel/ptrace.cstack = (unsigned char *)task->tss.esp0;
esp071kernel/ptrace.cstack = (unsigned char *) task->tss.esp0;
esp0149kernel/sys.cstack = current->tss.esp0;
esp0150kernel/sys.ccurrent->tss.esp0 = current->saved_kernel_stack;
esp0198kernel/sys.ccurrent->saved_kernel_stack = current->tss.esp0;
esp0199kernel/sys.ccurrent->tss.esp0 = (unsigned long) pt_regs;