x86: use generic register name in the thread and tss structures

This changes size-specific register names (eip/rip, esp/rsp, etc.) to
generic names in the thread and tss structures.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

23 files changed, 99 insertions, 101 deletions

diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index 4fc24a61f431..415313556708 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -101,8 +101,8 @@ void foo(void)
 	OFFSET(pbe_orig_address, pbe, orig_address);
 	OFFSET(pbe_next, pbe, next);
 
-	/* Offset from the sysenter stack to tss.esp0 */
-	DEFINE(TSS_sysenter_esp0, offsetof(struct tss_struct, x86_tss.esp0) -
+	/* Offset from the sysenter stack to tss.sp0 */
+	DEFINE(TSS_sysenter_sp0, offsetof(struct tss_struct, x86_tss.sp0) -
 		 sizeof(struct tss_struct));
 
 	DEFINE(PAGE_SIZE_asm, PAGE_SIZE);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 5db2a163bf4b..235cd615b89d 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -691,7 +691,7 @@ void __cpuinit cpu_init(void)
 		BUG();
 	enter_lazy_tlb(&init_mm, curr);
 
-	load_esp0(t, thread);
+	load_sp0(t, thread);
 	set_tss_desc(cpu,t);
 	load_TR_desc();
 	load_LDT(&init_mm.context);
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index 40978af630e7..cc19a3ea403a 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -35,12 +35,13 @@ static void doublefault_fn(void)
 		if (ptr_ok(tss)) {
 			struct i386_hw_tss *t = (struct i386_hw_tss *)tss;
 
-			printk(KERN_EMERG "eip = %08lx, esp = %08lx\n", t->eip, t->esp);
+			printk(KERN_EMERG "eip = %08lx, esp = %08lx\n",
+			       t->ip, t->sp);
 
 			printk(KERN_EMERG "eax = %08lx, ebx = %08lx, ecx = %08lx, edx = %08lx\n",
-				t->eax, t->ebx, t->ecx, t->edx);
+				t->ax, t->bx, t->cx, t->dx);
 			printk(KERN_EMERG "esi = %08lx, edi = %08lx\n",
-				t->esi, t->edi);
+				t->si, t->di);
 		}
 	}
 
@@ -50,15 +51,15 @@ static void doublefault_fn(void)
 
 struct tss_struct doublefault_tss __cacheline_aligned = {
 	.x86_tss = {
-		.esp0		= STACK_START,
+		.sp0		= STACK_START,
 		.ss0		= __KERNEL_DS,
 		.ldt		= 0,
 		.io_bitmap_base	= INVALID_IO_BITMAP_OFFSET,
 
-		.eip		= (unsigned long) doublefault_fn,
+		.ip		= (unsigned long) doublefault_fn,
 		/* 0x2 bit is always set */
-		.eflags		= X86_EFLAGS_SF | 0x2,
-		.esp		= STACK_START,
+		.flags		= X86_EFLAGS_SF | 0x2,
+		.sp		= STACK_START,
 		.es		= __USER_DS,
 		.cs		= __KERNEL_CS,
 		.ss		= __KERNEL_DS,
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 153bb87a4eea..6a474e1028c7 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -288,7 +288,7 @@ ENTRY(ia32_sysenter_target)
 	CFI_SIGNAL_FRAME
 	CFI_DEF_CFA esp, 0
 	CFI_REGISTER esp, ebp
-	movl TSS_sysenter_esp0(%esp),%esp
+	movl TSS_sysenter_sp0(%esp),%esp
 sysenter_past_esp:
 	/*
 	 * No need to follow this irqs on/off section: the syscall
@@ -743,7 +743,7 @@ END(device_not_available)
  * that sets up the real kernel stack. Check here, since we can't
  * allow the wrong stack to be used.
  *
- * "TSS_sysenter_esp0+12" is because the NMI/debug handler will have
+ * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have
  * already pushed 3 words if it hits on the sysenter instruction:
  * eflags, cs and eip.
  *
@@ -755,7 +755,7 @@ END(device_not_available)
 	cmpw $__KERNEL_CS,4(%esp);		\
 	jne ok;					\
 label:						\
-	movl TSS_sysenter_esp0+offset(%esp),%esp;	\
+	movl TSS_sysenter_sp0+offset(%esp),%esp;	\
 	CFI_DEF_CFA esp, 0;			\
 	CFI_UNDEFINED eip;			\
 	pushfl;					\
diff --git a/arch/x86/kernel/paravirt_32.c b/arch/x86/kernel/paravirt_32.c
index 706b0562ea40..f4e3a8e01cf2 100644
--- a/arch/x86/kernel/paravirt_32.c
+++ b/arch/x86/kernel/paravirt_32.c
@@ -382,7 +382,7 @@ struct pv_cpu_ops pv_cpu_ops = {
 	.write_ldt_entry = write_dt_entry,
 	.write_gdt_entry = write_dt_entry,
 	.write_idt_entry = write_dt_entry,
-	.load_esp0 = native_load_esp0,
+	.load_sp0 = native_load_sp0,
 
 	.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
 	.iret = native_iret,
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 3744cf63682c..add3bf34e205 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -75,7 +75,7 @@ EXPORT_PER_CPU_SYMBOL(cpu_number);
  */
 unsigned long thread_saved_pc(struct task_struct *tsk)
 {
-	return ((unsigned long *)tsk->thread.esp)[3];
+	return ((unsigned long *)tsk->thread.sp)[3];
 }
 
 /*
@@ -488,10 +488,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 	childregs->ax = 0;
 	childregs->sp = sp;
 
-	p->thread.esp = (unsigned long) childregs;
-	p->thread.esp0 = (unsigned long) (childregs+1);
+	p->thread.sp = (unsigned long) childregs;
+	p->thread.sp0 = (unsigned long) (childregs+1);
 
-	p->thread.eip = (unsigned long) ret_from_fork;
+	p->thread.ip = (unsigned long) ret_from_fork;
 
 	savesegment(gs,p->thread.gs);
 
@@ -718,7 +718,7 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
 	/*
 	 * Reload esp0.
 	 */
-	load_esp0(tss, next);
+	load_sp0(tss, next);
 
 	/*
 	 * Save away %gs. No need to save %fs, as it was saved on the
@@ -851,7 +851,7 @@ unsigned long get_wchan(struct task_struct *p)
 	if (!p || p == current || p->state == TASK_RUNNING)
 		return 0;
 	stack_page = (unsigned long)task_stack_page(p);
-	sp = p->thread.esp;
+	sp = p->thread.sp;
 	if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
 		return 0;
 	/* include/asm-i386/system.h:switch_to() pushes bp last. */
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index efbb1a2eab97..238193822e23 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -493,9 +493,9 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 	if (sp == ~0UL)
 		childregs->sp = (unsigned long)childregs;
 
-	p->thread.rsp = (unsigned long) childregs;
-	p->thread.rsp0 = (unsigned long) (childregs+1);
-	p->thread.userrsp = me->thread.userrsp; 
+	p->thread.sp = (unsigned long) childregs;
+	p->thread.sp0 = (unsigned long) (childregs+1);
+	p->thread.usersp = me->thread.usersp;
 
 	set_tsk_thread_flag(p, TIF_FORK);
 
@@ -607,7 +607,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 	/*
 	 * Reload esp0, LDT and the page table pointer:
 	 */
-	tss->rsp0 = next->rsp0;
+	tss->sp0 = next->sp0;
 
 	/* 
 	 * Switch DS and ES.
@@ -666,8 +666,8 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 	/* 
 	 * Switch the PDA and FPU contexts.
 	 */
-	prev->userrsp = read_pda(oldrsp); 
-	write_pda(oldrsp, next->userrsp); 
+	prev->usersp = read_pda(oldrsp);
+	write_pda(oldrsp, next->usersp);
 	write_pda(pcurrent, next_p); 
 
 	write_pda(kernelstack,
@@ -769,9 +769,9 @@ unsigned long get_wchan(struct task_struct *p)
 	if (!p || p == current || p->state==TASK_RUNNING)
 		return 0; 
 	stack = (unsigned long)task_stack_page(p);
-	if (p->thread.rsp < stack || p->thread.rsp > stack+THREAD_SIZE)
+	if (p->thread.sp < stack || p->thread.sp > stack+THREAD_SIZE)
 		return 0;
-	fp = *(u64 *)(p->thread.rsp);
+	fp = *(u64 *)(p->thread.sp);
 	do { 
 		if (fp < (unsigned long)stack ||
 		    fp > (unsigned long)stack+THREAD_SIZE)
diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c
index 3566191832b3..0f294d6e22cf 100644
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -454,7 +454,7 @@ void __devinit initialize_secondary(void)
 		"movl %0,%%esp\n\t"
 		"jmp *%1"
 		:
-		:"m" (current->thread.esp),"m" (current->thread.eip));
+		:"m" (current->thread.sp),"m" (current->thread.ip));
 }
 
 /* Static state in head.S used to set up a CPU */
@@ -753,7 +753,7 @@ static inline struct task_struct * __cpuinit alloc_idle_task(int cpu)
 		/* initialize thread_struct.  we really want to avoid destroy
 		 * idle tread
 		 */
-		idle->thread.esp = (unsigned long)task_pt_regs(idle);
+		idle->thread.sp = (unsigned long)task_pt_regs(idle);
 		init_idle(idle, cpu);
 		return idle;
 	}
@@ -798,7 +798,7 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
  	per_cpu(current_task, cpu) = idle;
 	early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
 
-	idle->thread.eip = (unsigned long) start_secondary;
+	idle->thread.ip = (unsigned long) start_secondary;
 	/* start_eip had better be page-aligned! */
 	start_eip = setup_trampoline();
 
@@ -808,7 +808,7 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
 	/* So we see what's up   */
 	printk("Booting processor %d/%d ip %lx\n", cpu, apicid, start_eip);
 	/* Stack for startup_32 can be just as for start_secondary onwards */
-	stack_start.sp = (void *) idle->thread.esp;
+	stack_start.sp = (void *) idle->thread.sp;
 
 	irq_ctx_init(cpu);
 
diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index ac1089f2b917..c3f2736ba530 100644
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -577,7 +577,7 @@ static int __cpuinit do_boot_cpu(int cpu, int apicid)
 	c_idle.idle = get_idle_for_cpu(cpu);
 
 	if (c_idle.idle) {
-		c_idle.idle->thread.rsp = (unsigned long) (((struct pt_regs *)
+		c_idle.idle->thread.sp = (unsigned long) (((struct pt_regs *)
 			(THREAD_SIZE +  task_stack_page(c_idle.idle))) - 1);
 		init_idle(c_idle.idle, cpu);
 		goto do_rest;
@@ -613,8 +613,8 @@ do_rest:
 
 	start_rip = setup_trampoline();
 
-	init_rsp = c_idle.idle->thread.rsp;
-	per_cpu(init_tss,cpu).rsp0 = init_rsp;
+	init_rsp = c_idle.idle->thread.sp;
+	per_cpu(init_tss,cpu).sp0 = init_rsp;
 	initial_code = start_secondary;
 	clear_tsk_thread_flag(c_idle.idle, TIF_FORK);
 
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 27713553cc59..57491942cc4e 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -163,7 +163,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
 		unsigned long dummy;
 		stack = &dummy;
 		if (task != current)
-			stack = (unsigned long *)task->thread.esp;
+			stack = (unsigned long *)task->thread.sp;
 	}
 
 #ifdef CONFIG_FRAME_POINTER
@@ -173,7 +173,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
 			asm ("movl %%ebp, %0" : "=r" (bp) : );
 		} else {
 			/* bp is the last reg pushed by switch_to */
-			bp = *(unsigned long *) task->thread.esp;
+			bp = *(unsigned long *) task->thread.sp;
 		}
 	}
 #endif
@@ -253,7 +253,7 @@ static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
 
 	if (sp == NULL) {
 		if (task)
-			sp = (unsigned long*)task->thread.esp;
+			sp = (unsigned long*)task->thread.sp;
 		else
 			sp = (unsigned long *)&sp;
 	}
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
index f7fecf9d47c3..965f2cc3a013 100644
--- a/arch/x86/kernel/traps_64.c
+++ b/arch/x86/kernel/traps_64.c
@@ -230,7 +230,7 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
 		unsigned long dummy;
 		stack = &dummy;
 		if (tsk && tsk != current)
-			stack = (unsigned long *)tsk->thread.rsp;
+			stack = (unsigned long *)tsk->thread.sp;
 	}
 
 	/*
@@ -366,7 +366,7 @@ _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp)
 
 	if (sp == NULL) {
 		if (tsk)
-			sp = (unsigned long *)tsk->thread.rsp;
+			sp = (unsigned long *)tsk->thread.sp;
 		else
 			sp = (unsigned long *)&sp;
 	}
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 980e85b90091..e85bb44265cb 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -147,10 +147,10 @@ struct pt_regs * fastcall save_v86_state(struct kernel_vm86_regs * regs)
 	}
 
 	tss = &per_cpu(init_tss, get_cpu());
-	current->thread.esp0 = current->thread.saved_esp0;
+	current->thread.sp0 = current->thread.saved_sp0;
 	current->thread.sysenter_cs = __KERNEL_CS;
-	load_esp0(tss, &current->thread);
-	current->thread.saved_esp0 = 0;
+	load_sp0(tss, &current->thread);
+	current->thread.saved_sp0 = 0;
 	put_cpu();
 
 	ret = KVM86->regs32;
@@ -207,7 +207,7 @@ asmlinkage int sys_vm86old(struct pt_regs regs)
 	int tmp, ret = -EPERM;
 
 	tsk = current;
-	if (tsk->thread.saved_esp0)
+	if (tsk->thread.saved_sp0)
 		goto out;
 	tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
 				       offsetof(struct kernel_vm86_struct, vm86plus) -
@@ -256,7 +256,7 @@ asmlinkage int sys_vm86(struct pt_regs regs)
 
 	/* we come here only for functions VM86_ENTER, VM86_ENTER_NO_BYPASS */
 	ret = -EPERM;
-	if (tsk->thread.saved_esp0)
+	if (tsk->thread.saved_sp0)
 		goto out;
 	v86 = (struct vm86plus_struct __user *)regs.cx;
 	tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
@@ -318,15 +318,15 @@ static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk
  * Save old state, set default return value (%ax) to 0
  */
 	info->regs32->ax = 0;
-	tsk->thread.saved_esp0 = tsk->thread.esp0;
+	tsk->thread.saved_sp0 = tsk->thread.sp0;
 	tsk->thread.saved_fs = info->regs32->fs;
 	savesegment(gs, tsk->thread.saved_gs);
 
 	tss = &per_cpu(init_tss, get_cpu());
-	tsk->thread.esp0 = (unsigned long) &info->VM86_TSS_ESP0;
+	tsk->thread.sp0 = (unsigned long) &info->VM86_TSS_ESP0;
 	if (cpu_has_sep)
 		tsk->thread.sysenter_cs = 0;
-	load_esp0(tss, &tsk->thread);
+	load_sp0(tss, &tsk->thread);
 	put_cpu();
 
 	tsk->thread.screen_bitmap = info->screen_bitmap;
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 599b6f2ed562..4cfda7dbe90f 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -62,7 +62,7 @@ static struct {
 	void (*cpuid)(void /* non-c */);
 	void (*_set_ldt)(u32 selector);
 	void (*set_tr)(u32 selector);
-	void (*set_kernel_stack)(u32 selector, u32 esp0);
+	void (*set_kernel_stack)(u32 selector, u32 sp0);
 	void (*allocate_page)(u32, u32, u32, u32, u32);
 	void (*release_page)(u32, u32);
 	void (*set_pte)(pte_t, pte_t *, unsigned);
@@ -214,17 +214,17 @@ static void vmi_set_tr(void)
 	vmi_ops.set_tr(GDT_ENTRY_TSS*sizeof(struct desc_struct));
 }
 
-static void vmi_load_esp0(struct tss_struct *tss,
+static void vmi_load_sp0(struct tss_struct *tss,
 				   struct thread_struct *thread)
 {
-	tss->x86_tss.esp0 = thread->esp0;
+	tss->x86_tss.sp0 = thread->sp0;
 
 	/* This can only happen when SEP is enabled, no need to test "SEP"arately */
 	if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
 		tss->x86_tss.ss1 = thread->sysenter_cs;
 		wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0);
 	}
-	vmi_ops.set_kernel_stack(__KERNEL_DS, tss->x86_tss.esp0);
+	vmi_ops.set_kernel_stack(__KERNEL_DS, tss->x86_tss.sp0);
 }
 
 static void vmi_flush_tlb_user(void)
@@ -793,7 +793,7 @@ static inline int __init activate_vmi(void)
 	para_fill(pv_cpu_ops.write_ldt_entry, WriteLDTEntry);
 	para_fill(pv_cpu_ops.write_gdt_entry, WriteGDTEntry);
 	para_fill(pv_cpu_ops.write_idt_entry, WriteIDTEntry);
-	para_wrap(pv_cpu_ops.load_esp0, vmi_load_esp0, set_kernel_stack, UpdateKernelStack);
+	para_wrap(pv_cpu_ops.load_sp0, vmi_load_sp0, set_kernel_stack, UpdateKernelStack);
 	para_fill(pv_cpu_ops.set_iopl_mask, SetIOPLMask);
 	para_fill(pv_cpu_ops.io_delay, IODelay);
 
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index ea46d05853bb..c751e3c03e85 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -755,10 +755,10 @@ static void lguest_time_init(void)
  * segment), the privilege level (we're privilege level 1, the Host is 0 and
  * will not tolerate us trying to use that), the stack pointer, and the number
  * of pages in the stack. */
-static void lguest_load_esp0(struct tss_struct *tss,
+static void lguest_load_sp0(struct tss_struct *tss,
 				     struct thread_struct *thread)
 {
-	lazy_hcall(LHCALL_SET_STACK, __KERNEL_DS|0x1, thread->esp0,
+	lazy_hcall(LHCALL_SET_STACK, __KERNEL_DS|0x1, thread->sp0,
 		   THREAD_SIZE/PAGE_SIZE);
 }
 
@@ -957,7 +957,7 @@ __init void lguest_init(void)
 	pv_cpu_ops.cpuid = lguest_cpuid;
 	pv_cpu_ops.load_idt = lguest_load_idt;
 	pv_cpu_ops.iret = lguest_iret;
-	pv_cpu_ops.load_esp0 = lguest_load_esp0;
+	pv_cpu_ops.load_sp0 = lguest_load_sp0;
 	pv_cpu_ops.load_tr_desc = lguest_load_tr_desc;
 	pv_cpu_ops.set_ldt = lguest_set_ldt;
 	pv_cpu_ops.load_tls = lguest_load_tls;
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index d97a6d7d062b..e0feb66a2408 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -243,9 +243,9 @@ void enable_sep_cpu(void)
 	}
 
 	tss->x86_tss.ss1 = __KERNEL_CS;
-	tss->x86_tss.esp1 = sizeof(struct tss_struct) + (unsigned long) tss;
+	tss->x86_tss.sp1 = sizeof(struct tss_struct) + (unsigned long) tss;
 	wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
-	wrmsr(MSR_IA32_SYSENTER_ESP, tss->x86_tss.esp1, 0);
+	wrmsr(MSR_IA32_SYSENTER_ESP, tss->x86_tss.sp1, 0);
 	wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) ia32_sysenter_target, 0);
 	put_cpu();	
 }
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 29517faaa735..d81e8d709102 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -499,11 +499,11 @@ static void xen_write_gdt_entry(struct desc_struct *dt, int entry,
 	preempt_enable();
 }
 
-static void xen_load_esp0(struct tss_struct *tss,
+static void xen_load_sp0(struct tss_struct *tss,
 			  struct thread_struct *thread)
 {
 	struct multicall_space mcs = xen_mc_entry(0);
-	MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->esp0);
+	MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0);
 	xen_mc_issue(PARAVIRT_LAZY_CPU);
 }
 
@@ -968,7 +968,7 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
 	.write_ldt_entry = xen_write_ldt_entry,
 	.write_gdt_entry = xen_write_gdt_entry,
 	.write_idt_entry = xen_write_idt_entry,
-	.load_esp0 = xen_load_esp0,
+	.load_sp0 = xen_load_sp0,
 
 	.set_iopl_mask = xen_set_iopl_mask,
 	.io_delay = xen_io_delay,
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 8e1234e14559..aafc54437403 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -239,10 +239,10 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
 	ctxt->gdt_ents      = ARRAY_SIZE(gdt->gdt);
 
 	ctxt->user_regs.cs = __KERNEL_CS;
-	ctxt->user_regs.esp = idle->thread.esp0 - sizeof(struct pt_regs);
+	ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
 
 	ctxt->kernel_ss = __KERNEL_DS;
-	ctxt->kernel_sp = idle->thread.esp0;
+	ctxt->kernel_sp = idle->thread.sp0;
 
 	ctxt->event_callback_cs     = __KERNEL_CS;
 	ctxt->event_callback_eip    = (unsigned long)xen_hypervisor_callback;
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c
index 96d0fd07c57d..44adb00e1490 100644
--- a/drivers/lguest/x86/core.c
+++ b/drivers/lguest/x86/core.c
@@ -94,7 +94,7 @@ static void copy_in_guest_info(struct lguest *lg, struct lguest_pages *pages)
 	/* Set up the two "TSS" members which tell the CPU what stack to use
 	 * for traps which do directly into the Guest (ie. traps at privilege
 	 * level 1). */
-	pages->state.guest_tss.esp1 = lg->esp1;
+	pages->state.guest_tss.sp1 = lg->esp1;
 	pages->state.guest_tss.ss1 = lg->ss1;
 
 	/* Copy direct-to-Guest trap entries. */
@@ -416,7 +416,7 @@ void __init lguest_arch_host_init(void)
 		/* We know where we want the stack to be when the Guest enters
 		 * the switcher: in pages->regs.  The stack grows upwards, so
 		 * we start it at the end of that structure. */
-		state->guest_tss.esp0 = (long)(&pages->regs + 1);
+		state->guest_tss.sp0 = (long)(&pages->regs + 1);
 		/* And this is the GDT entry to use for the stack: we keep a
 		 * couple of special LGUEST entries. */
 		state->guest_tss.ss0 = LGUEST_DS;
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index be7b934f6c54..d1780e32722e 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -101,7 +101,7 @@ struct pv_cpu_ops {
 				int entrynum, u32 low, u32 high);
 	void (*write_idt_entry)(struct desc_struct *,
 				int entrynum, u32 low, u32 high);
-	void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t);
+	void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
 
 	void (*set_iopl_mask)(unsigned mask);
 
@@ -449,10 +449,10 @@ static inline int paravirt_enabled(void)
 	return pv_info.paravirt_enabled;
 }
 
-static inline void load_esp0(struct tss_struct *tss,
+static inline void load_sp0(struct tss_struct *tss,
 			     struct thread_struct *thread)
 {
-	PVOP_VCALL2(pv_cpu_ops.load_esp0, tss, thread);
+	PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
 }
 
 #define ARCH_SETUP			pv_init_ops.arch_setup();
diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h
index d50a4b48d441..6846cc346400 100644
--- a/include/asm-x86/processor_32.h
+++ b/include/asm-x86/processor_32.h
@@ -292,20 +292,17 @@ struct thread_struct;
 /* This is the TSS defined by the hardware. */
 struct i386_hw_tss {
 	unsigned short	back_link,__blh;
-	unsigned long	esp0;
+	unsigned long	sp0;
 	unsigned short	ss0,__ss0h;
-	unsigned long	esp1;
+	unsigned long	sp1;
 	unsigned short	ss1,__ss1h;	/* ss1 is used to cache MSR_IA32_SYSENTER_CS */
-	unsigned long	esp2;
+	unsigned long	sp2;
 	unsigned short	ss2,__ss2h;
 	unsigned long	__cr3;
-	unsigned long	eip;
-	unsigned long	eflags;
-	unsigned long	eax,ecx,edx,ebx;
-	unsigned long	esp;
-	unsigned long	ebp;
-	unsigned long	esi;
-	unsigned long	edi;
+	unsigned long	ip;
+	unsigned long	flags;
+	unsigned long	ax, cx, dx, bx;
+	unsigned long	sp, bp, si, di;
 	unsigned short	es, __esh;
 	unsigned short	cs, __csh;
 	unsigned short	ss, __ssh;
@@ -346,10 +343,10 @@ struct tss_struct {
 struct thread_struct {
 /* cached TLS descriptors. */
 	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
-	unsigned long	esp0;
+	unsigned long	sp0;
 	unsigned long	sysenter_cs;
-	unsigned long	eip;
-	unsigned long	esp;
+	unsigned long	ip;
+	unsigned long	sp;
 	unsigned long	fs;
 	unsigned long	gs;
 /* Hardware debugging registers */
@@ -366,7 +363,7 @@ struct thread_struct {
 /* virtual 86 mode info */
 	struct vm86_struct __user * vm86_info;
 	unsigned long		screen_bitmap;
-	unsigned long		v86flags, v86mask, saved_esp0;
+	unsigned long		v86flags, v86mask, saved_sp0;
 	unsigned int		saved_fs, saved_gs;
 /* IO permissions */
 	unsigned long	*io_bitmap_ptr;
@@ -378,7 +375,7 @@ struct thread_struct {
 };
 
 #define INIT_THREAD  {							\
-	.esp0 = sizeof(init_stack) + (long)&init_stack,			\
+	.sp0 = sizeof(init_stack) + (long)&init_stack,			\
 	.vm86_info = NULL,						\
 	.sysenter_cs = __KERNEL_CS,					\
 	.io_bitmap_ptr = NULL,						\
@@ -393,7 +390,7 @@ struct thread_struct {
  */
 #define INIT_TSS  {							\
 	.x86_tss = {							\
-		.esp0		= sizeof(init_stack) + (long)&init_stack, \
+		.sp0		= sizeof(init_stack) + (long)&init_stack, \
 		.ss0		= __KERNEL_DS,				\
 		.ss1		= __KERNEL_CS,				\
 		.io_bitmap_base	= INVALID_IO_BITMAP_OFFSET,		\
@@ -503,9 +500,9 @@ static inline void rep_nop(void)
 
 #define cpu_relax()	rep_nop()
 
-static inline void native_load_esp0(struct tss_struct *tss, struct thread_struct *thread)
+static inline void native_load_sp0(struct tss_struct *tss, struct thread_struct *thread)
 {
-	tss->x86_tss.esp0 = thread->esp0;
+	tss->x86_tss.sp0 = thread->sp0;
 	/* This can only happen when SEP is enabled, no need to test "SEP"arately */
 	if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) {
 		tss->x86_tss.ss1 = thread->sysenter_cs;
@@ -585,9 +582,9 @@ static inline void native_set_iopl_mask(unsigned mask)
 #define paravirt_enabled() 0
 #define __cpuid native_cpuid
 
-static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread)
+static inline void load_sp0(struct tss_struct *tss, struct thread_struct *thread)
 {
-	native_load_esp0(tss, thread);
+	native_load_sp0(tss, thread);
 }
 
 /*
diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index 797770113e6d..0780f3e3fdfe 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -177,9 +177,9 @@ union i387_union {
 
 struct tss_struct {
 	u32 reserved1;
-	u64 rsp0;	
-	u64 rsp1;
-	u64 rsp2;
+	u64 sp0;
+	u64 sp1;
+	u64 sp2;
 	u64 reserved2;
 	u64 ist[7];
 	u32 reserved3;
@@ -216,9 +216,9 @@ DECLARE_PER_CPU(struct orig_ist, orig_ist);
 #endif
 
 struct thread_struct {
-	unsigned long	rsp0;
-	unsigned long	rsp;
-	unsigned long 	userrsp;	/* Copy from PDA */ 
+	unsigned long	sp0;
+	unsigned long	sp;
+	unsigned long 	usersp;	/* Copy from PDA */
 	unsigned long	fs;
 	unsigned long	gs;
 	unsigned short	es, ds, fsindex, gsindex;	
@@ -245,11 +245,11 @@ struct thread_struct {
 } __attribute__((aligned(16)));
 
 #define INIT_THREAD  { \
-	.rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+	.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
 }
 
 #define INIT_TSS  { \
-	.rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+	.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
 }
 
 #define INIT_MMAP \
@@ -293,10 +293,10 @@ extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
  * Return saved PC of a blocked thread.
  * What is this good for? it will be always the scheduler or ret_from_fork.
  */
-#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.rsp - 8))
+#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
 
 extern unsigned long get_wchan(struct task_struct *p);
-#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.rsp0 - 1)
+#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->ip)
 #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
 
diff --git a/include/asm-x86/system_32.h b/include/asm-x86/system_32.h
index db6283eb5e46..f5b3f77f5310 100644
--- a/include/asm-x86/system_32.h
+++ b/include/asm-x86/system_32.h
@@ -28,9 +28,9 @@ extern struct task_struct * FASTCALL(__switch_to(struct task_struct *prev, struc
 		     "1:\t"						\
 		     "popl %%ebp\n\t"					\
 		     "popfl"						\
-		     :"=m" (prev->thread.esp),"=m" (prev->thread.eip),	\
+		     :"=m" (prev->thread.sp),"=m" (prev->thread.ip),	\
 		      "=a" (last),"=S" (esi),"=D" (edi)			\
-		     :"m" (next->thread.esp),"m" (next->thread.eip),	\
+		     :"m" (next->thread.sp),"m" (next->thread.ip),	\
 		      "2" (prev), "d" (next));				\
 } while (0)
 
diff --git a/include/asm-x86/system_64.h b/include/asm-x86/system_64.h
index 6e9e4841a2da..3dcb217a7202 100644
--- a/include/asm-x86/system_64.h
+++ b/include/asm-x86/system_64.h
@@ -40,7 +40,7 @@
 		     RESTORE_CONTEXT						    \
 		     : "=a" (last)					  	  \
 		     : [next] "S" (next), [prev] "D" (prev),			  \
-		       [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
+		       [threadrsp] "i" (offsetof(struct task_struct, thread.sp)), \
 		       [ti_flags] "i" (offsetof(struct thread_info, flags)),\
 		       [tif_fork] "i" (TIF_FORK),			  \
 		       [thread_info] "i" (offsetof(struct task_struct, stack)), \