x86: rename the struct pt_regs members for 32/64-bit consistency

We have a lot of code which differs only by the naming of specific
members of structures that contain registers.  In order to enable
additional unifications, this patch drops the e- or r- size prefix
from the register names in struct pt_regs, and drops the x- prefixes
for segment registers on the 32-bit side.

This patch also performs the equivalent renames in some additional
places that might be candidates for unification in the future.

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>

43 files changed, 804 insertions, 807 deletions

diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index a764e4e95314..f1a0f83676dc 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -53,7 +53,7 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
 /* changed the size calculations - should hopefully work better. lbt */
         dump->magic = CMAGIC;
         dump->start_code = 0;
-        dump->start_stack = regs->rsp & ~(PAGE_SIZE - 1);
+        dump->start_stack = regs->sp & ~(PAGE_SIZE - 1);
         dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
         dump->u_dsize = ((unsigned long)
                          (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
@@ -75,22 +75,22 @@ static void dump_thread32(struct pt_regs *regs, struct user32 *dump)
                 dump->u_ssize = tmp >> PAGE_SHIFT;
         }
 
-        dump->regs.ebx = regs->rbx;
-        dump->regs.ecx = regs->rcx;
-        dump->regs.edx = regs->rdx;
-        dump->regs.esi = regs->rsi;
-        dump->regs.edi = regs->rdi;
-        dump->regs.ebp = regs->rbp;
-        dump->regs.eax = regs->rax;
+        dump->regs.bx = regs->bx;
+        dump->regs.cx = regs->cx;
+        dump->regs.dx = regs->dx;
+        dump->regs.si = regs->si;
+        dump->regs.di = regs->di;
+        dump->regs.bp = regs->bp;
+        dump->regs.ax = regs->ax;
         dump->regs.ds = current->thread.ds;
         dump->regs.es = current->thread.es;
         asm("movl %%fs,%0" : "=r" (fs)); dump->regs.fs = fs;
         asm("movl %%gs,%0" : "=r" (gs)); dump->regs.gs = gs;
-        dump->regs.orig_eax = regs->orig_rax;
-        dump->regs.eip = regs->rip;
+        dump->regs.orig_ax = regs->orig_ax;
+        dump->regs.ip = regs->ip;
         dump->regs.cs = regs->cs;
-        dump->regs.eflags = regs->eflags;
-        dump->regs.esp = regs->rsp;
+        dump->regs.flags = regs->flags;
+        dump->regs.sp = regs->sp;
         dump->regs.ss = regs->ss;
 
 #if 1 /* FIXME */
@@ -432,9 +432,9 @@ beyond_if:
         asm volatile("movl %0,%%fs" :: "r" (0)); \
         asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS));
         load_gs_index(0);
-        (regs)->rip = ex.a_entry;
-        (regs)->rsp = current->mm->start_stack;
-        (regs)->eflags = 0x200;
+        (regs)->ip = ex.a_entry;
+        (regs)->sp = current->mm->start_stack;
+        (regs)->flags = 0x200;
         (regs)->cs = __USER32_CS;
         (regs)->ss = __USER32_DS;
         regs->r8 = regs->r9 = regs->r10 = regs->r11 =
diff --git a/arch/x86/ia32/ia32_binfmt.c b/arch/x86/ia32/ia32_binfmt.c
index e32974c3dd3b..806135c3f975 100644
--- a/arch/x86/ia32/ia32_binfmt.c
+++ b/arch/x86/ia32/ia32_binfmt.c
@@ -73,22 +73,22 @@ struct file;
 /* Assumes current==process to be dumped */
 #undef  ELF_CORE_COPY_REGS
 #define ELF_CORE_COPY_REGS(pr_reg, regs)                \
-        pr_reg[0] = regs->rbx;                          \
-        pr_reg[1] = regs->rcx;                          \
-        pr_reg[2] = regs->rdx;                          \
-        pr_reg[3] = regs->rsi;                          \
-        pr_reg[4] = regs->rdi;                          \
-        pr_reg[5] = regs->rbp;                          \
-        pr_reg[6] = regs->rax;                          \
+        pr_reg[0] = regs->bx;                           \
+        pr_reg[1] = regs->cx;                           \
+        pr_reg[2] = regs->dx;                           \
+        pr_reg[3] = regs->si;                           \
+        pr_reg[4] = regs->di;                           \
+        pr_reg[5] = regs->bp;                           \
+        pr_reg[6] = regs->ax;                           \
         pr_reg[7] = _GET_SEG(ds);                       \
         pr_reg[8] = _GET_SEG(es);                       \
         pr_reg[9] = _GET_SEG(fs);                       \
         pr_reg[10] = _GET_SEG(gs);                      \
-        pr_reg[11] = regs->orig_rax;                    \
-        pr_reg[12] = regs->rip;                         \
+        pr_reg[11] = regs->orig_ax;                     \
+        pr_reg[12] = regs->ip;                          \
         pr_reg[13] = regs->cs;                          \
-        pr_reg[14] = regs->eflags;                      \
-        pr_reg[15] = regs->rsp;                         \
+        pr_reg[14] = regs->flags;                       \
+        pr_reg[15] = regs->sp;                          \
         pr_reg[16] = regs->ss;
 
 
@@ -205,9 +205,9 @@ do {							\
         asm volatile("movl %0,%%fs" :: "r" (0)); \
         asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
         load_gs_index(0); \
-        (regs)->rip = (new_rip); \
-        (regs)->rsp = (new_rsp); \
-        (regs)->eflags = 0x200; \
+        (regs)->ip = (new_rip); \
+        (regs)->sp = (new_rsp); \
+        (regs)->flags = X86_EFLAGS_IF; \
         (regs)->cs = __USER32_CS; \
         (regs)->ss = __USER32_DS; \
         set_fs(USER_DS); \
@@ -233,13 +233,13 @@ extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
 static void elf32_init(struct pt_regs *regs)
 {
         struct task_struct *me = current; 
-        regs->rdi = 0;
-        regs->rsi = 0;
-        regs->rdx = 0;
-        regs->rcx = 0;
-        regs->rax = 0;
-        regs->rbx = 0; 
-        regs->rbp = 0; 
+        regs->di = 0;
+        regs->si = 0;
+        regs->dx = 0;
+        regs->cx = 0;
+        regs->ax = 0;
+        regs->bx = 0;
+        regs->bp = 0;
         regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 =
                 regs->r13 = regs->r14 = regs->r15 = 0; 
     me->thread.fs = 0; 
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 39356a756b28..f2da443f8c7b 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -154,7 +154,7 @@ asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
         }
         seg = get_fs();
         set_fs(KERNEL_DS);
-        ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->rsp);
+        ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->sp);
         set_fs(seg);
         if (ret >= 0 && uoss_ptr)  {
                 if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(stack_ia32_t)) ||
@@ -195,7 +195,7 @@ struct rt_sigframe
 #define COPY(x)         { \
         unsigned int reg;                       \
         err |= __get_user(reg, &sc->e ##x);     \
-        regs->r ## x = reg;                     \
+        regs->x = reg;                  \
 }
 
 #define RELOAD_SEG(seg,mask)                                            \
@@ -220,7 +220,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
 #if DEBUG_SIG
         printk(KERN_DEBUG "SIG restore_sigcontext: "
                "sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
-               sc, sc->err, sc->eip, sc->cs, sc->eflags);
+               sc, sc->err, sc->ip, sc->cs, sc->flags);
 #endif
 
         /*
@@ -249,9 +249,9 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
         regs->ss |= 3;
 
         err |= __get_user(tmpflags, &sc->eflags);
-        regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
+        regs->flags = (regs->flags & ~0x40DD5) | (tmpflags & 0x40DD5);
         /* disable syscall checks */
-        regs->orig_rax = -1;
+        regs->orig_ax = -1;
 
         err |= __get_user(tmp, &sc->fpstate);
         buf = compat_ptr(tmp);
@@ -279,9 +279,9 @@ badframe:
 
 asmlinkage long sys32_sigreturn(struct pt_regs *regs)
 {
-        struct sigframe __user *frame = (struct sigframe __user *)(regs->rsp-8);
+        struct sigframe __user *frame = (struct sigframe __user *)(regs->sp-8);
         sigset_t set;
-        unsigned int eax;
+        unsigned int ax;
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -298,9 +298,9 @@ asmlinkage long sys32_sigreturn(struct pt_regs *regs)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        if (ia32_restore_sigcontext(regs, &frame->sc, &eax))
+        if (ia32_restore_sigcontext(regs, &frame->sc, &ax))
                 goto badframe;
-        return eax;
+        return ax;
 
 badframe:
         signal_fault(regs, frame, "32bit sigreturn");
@@ -311,10 +311,10 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
 {
         struct rt_sigframe __user *frame;
         sigset_t set;
-        unsigned int eax;
+        unsigned int ax;
         struct pt_regs tregs;
 
-        frame = (struct rt_sigframe __user *)(regs->rsp - 4);
+        frame = (struct rt_sigframe __user *)(regs->sp - 4);
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -327,14 +327,14 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
+        if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
                 goto badframe;
 
         tregs = *regs;
         if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
                 goto badframe;
 
-        return eax;
+        return ax;
 
 badframe:
         signal_fault(regs, frame, "32bit rt sigreturn");
@@ -361,21 +361,21 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
         __asm__("movl %%es,%0" : "=r"(tmp): "0"(tmp));
         err |= __put_user(tmp, (unsigned int __user *)&sc->es);
 
-        err |= __put_user((u32)regs->rdi, &sc->edi);
-        err |= __put_user((u32)regs->rsi, &sc->esi);
-        err |= __put_user((u32)regs->rbp, &sc->ebp);
-        err |= __put_user((u32)regs->rsp, &sc->esp);
-        err |= __put_user((u32)regs->rbx, &sc->ebx);
-        err |= __put_user((u32)regs->rdx, &sc->edx);
-        err |= __put_user((u32)regs->rcx, &sc->ecx);
-        err |= __put_user((u32)regs->rax, &sc->eax);
+        err |= __put_user((u32)regs->di, &sc->edi);
+        err |= __put_user((u32)regs->si, &sc->esi);
+        err |= __put_user((u32)regs->bp, &sc->ebp);
+        err |= __put_user((u32)regs->sp, &sc->esp);
+        err |= __put_user((u32)regs->bx, &sc->ebx);
+        err |= __put_user((u32)regs->dx, &sc->edx);
+        err |= __put_user((u32)regs->cx, &sc->ecx);
+        err |= __put_user((u32)regs->ax, &sc->eax);
         err |= __put_user((u32)regs->cs, &sc->cs);
         err |= __put_user((u32)regs->ss, &sc->ss);
         err |= __put_user(current->thread.trap_no, &sc->trapno);
         err |= __put_user(current->thread.error_code, &sc->err);
-        err |= __put_user((u32)regs->rip, &sc->eip);
-        err |= __put_user((u32)regs->eflags, &sc->eflags);
-        err |= __put_user((u32)regs->rsp, &sc->esp_at_signal);
+        err |= __put_user((u32)regs->ip, &sc->eip);
+        err |= __put_user((u32)regs->flags, &sc->eflags);
+        err |= __put_user((u32)regs->sp, &sc->esp_at_signal);
 
         tmp = save_i387_ia32(current, fpstate, regs, 0);
         if (tmp < 0)
@@ -400,28 +400,28 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
 static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
                                  size_t frame_size)
 {
-        unsigned long rsp;
+        unsigned long sp;
 
         /* Default to using normal stack */
-        rsp = regs->rsp;
+        sp = regs->sp;
 
         /* This is the X/Open sanctioned signal stack switching.  */
         if (ka->sa.sa_flags & SA_ONSTACK) {
-                if (sas_ss_flags(rsp) == 0)
-                        rsp = current->sas_ss_sp + current->sas_ss_size;
+                if (sas_ss_flags(sp) == 0)
+                        sp = current->sas_ss_sp + current->sas_ss_size;
         }
 
         /* This is the legacy signal stack switching. */
         else if ((regs->ss & 0xffff) != __USER_DS &&
                 !(ka->sa.sa_flags & SA_RESTORER) &&
                  ka->sa.sa_restorer)
-                rsp = (unsigned long) ka->sa.sa_restorer;
+                sp = (unsigned long) ka->sa.sa_restorer;
 
-        rsp -= frame_size;
+        sp -= frame_size;
         /* Align the stack pointer according to the i386 ABI,
          * i.e. so that on function entry ((sp + 4) & 15) == 0. */
-        rsp = ((rsp + 4) & -16ul) - 4;
-        return (void __user *) rsp;
+        sp = ((sp + 4) & -16ul) - 4;
+        return (void __user *) sp;
 }
 
 int ia32_setup_frame(int sig, struct k_sigaction *ka,
@@ -486,13 +486,13 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
                 goto give_sigsegv;
 
         /* Set up registers for signal handler */
-        regs->rsp = (unsigned long) frame;
-        regs->rip = (unsigned long) ka->sa.sa_handler;
+        regs->sp = (unsigned long) frame;
+        regs->ip = (unsigned long) ka->sa.sa_handler;
 
         /* Make -mregparm=3 work */
-        regs->rax = sig;
-        regs->rdx = 0;
-        regs->rcx = 0;
+        regs->ax = sig;
+        regs->dx = 0;
+        regs->cx = 0;
 
         asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
         asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
@@ -501,13 +501,13 @@ int ia32_setup_frame(int sig, struct k_sigaction *ka,
         regs->ss = __USER32_DS;
 
         set_fs(USER_DS);
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
         printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
-               current->comm, current->pid, frame, regs->rip, frame->pretcode);
+               current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
         return 0;
@@ -556,7 +556,7 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(0, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
         err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(regs->rsp),
+        err |= __put_user(sas_ss_flags(regs->sp),
                           &frame->uc.uc_stack.ss_flags);
         err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
         err |= ia32_setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
@@ -581,18 +581,18 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 goto give_sigsegv;
 
         /* Set up registers for signal handler */
-        regs->rsp = (unsigned long) frame;
-        regs->rip = (unsigned long) ka->sa.sa_handler;
+        regs->sp = (unsigned long) frame;
+        regs->ip = (unsigned long) ka->sa.sa_handler;
 
         /* Make -mregparm=3 work */
-        regs->rax = sig;
-        regs->rdx = (unsigned long) &frame->info;
-        regs->rcx = (unsigned long) &frame->uc;
+        regs->ax = sig;
+        regs->dx = (unsigned long) &frame->info;
+        regs->cx = (unsigned long) &frame->uc;
 
         /* Make -mregparm=3 work */
-        regs->rax = sig;
-        regs->rdx = (unsigned long) &frame->info;
-        regs->rcx = (unsigned long) &frame->uc;
+        regs->ax = sig;
+        regs->dx = (unsigned long) &frame->info;
+        regs->cx = (unsigned long) &frame->uc;
 
         asm volatile("movl %0,%%ds" :: "r" (__USER32_DS));
         asm volatile("movl %0,%%es" :: "r" (__USER32_DS));
@@ -601,13 +601,13 @@ int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         regs->ss = __USER32_DS;
 
         set_fs(USER_DS);
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
         printk(KERN_DEBUG "SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
-               current->comm, current->pid, frame, regs->rip, frame->pretcode);
+               current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
         return 0;
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c
index 8c6fb9d8352b..1e382e3bd882 100644
--- a/arch/x86/ia32/ptrace32.c
+++ b/arch/x86/ia32/ptrace32.c
@@ -73,19 +73,19 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 val)
                 stack[offsetof(struct pt_regs, cs)/8] = val & 0xffff;
                 break;
 
-        R32(ebx, rbx);
-        R32(ecx, rcx);
-        R32(edx, rdx);
-        R32(edi, rdi);
-        R32(esi, rsi);
-        R32(ebp, rbp);
-        R32(eax, rax);
-        R32(orig_eax, orig_rax);
-        R32(eip, rip);
-        R32(esp, rsp);
+        R32(ebx, bx);
+        R32(ecx, cx);
+        R32(edx, dx);
+        R32(edi, di);
+        R32(esi, si);
+        R32(ebp, bp);
+        R32(eax, ax);
+        R32(orig_eax, orig_ax);
+        R32(eip, ip);
+        R32(esp, sp);
 
         case offsetof(struct user32, regs.eflags): {
-                __u64 *flags = &stack[offsetof(struct pt_regs, eflags)/8];
+                __u64 *flags = &stack[offsetof(struct pt_regs, flags)/8];
 
                 val &= FLAG_MASK;
                 /*
@@ -145,22 +145,22 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
 
         R32(cs, cs);
         R32(ss, ss);
-        R32(ebx, rbx);
-        R32(ecx, rcx);
-        R32(edx, rdx);
-        R32(edi, rdi);
-        R32(esi, rsi);
-        R32(ebp, rbp);
-        R32(eax, rax);
-        R32(orig_eax, orig_rax);
-        R32(eip, rip);
-        R32(esp, rsp);
+        R32(ebx, bx);
+        R32(ecx, cx);
+        R32(edx, dx);
+        R32(edi, di);
+        R32(esi, si);
+        R32(ebp, bp);
+        R32(eax, ax);
+        R32(orig_eax, orig_ax);
+        R32(eip, ip);
+        R32(esp, sp);
 
         case offsetof(struct user32, regs.eflags):
                 /*
                  * If the debugger set TF, hide it from the readout.
                  */
-                *val = stack[offsetof(struct pt_regs, eflags)/8];
+                *val = stack[offsetof(struct pt_regs, flags)/8];
                 if (test_tsk_thread_flag(child, TIF_FORCED_TF))
                         *val &= ~X86_EFLAGS_TF;
                 break;
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index 58991abc5b59..abf71d26fc2a 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -816,11 +816,11 @@ asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
                             struct pt_regs *regs)
 {
-        void __user *parent_tid = (void __user *)regs->rdx;
-        void __user *child_tid = (void __user *)regs->rdi;
+        void __user *parent_tid = (void __user *)regs->dx;
+        void __user *child_tid = (void __user *)regs->di;
 
         if (!newsp)
-                newsp = regs->rsp;
+                newsp = regs->sp;
         return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 }
 
diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S
index 5ed3bc5c61d7..2e1b9e0d0767 100644
--- a/arch/x86/kernel/acpi/wakeup_64.S
+++ b/arch/x86/kernel/acpi/wakeup_64.S
@@ -344,13 +344,13 @@ do_suspend_lowlevel:
         call    save_processor_state
 
         movq    $saved_context, %rax
-        movq    %rsp, pt_regs_rsp(%rax)
-        movq    %rbp, pt_regs_rbp(%rax)
-        movq    %rsi, pt_regs_rsi(%rax)
-        movq    %rdi, pt_regs_rdi(%rax)
-        movq    %rbx, pt_regs_rbx(%rax)
-        movq    %rcx, pt_regs_rcx(%rax)
-        movq    %rdx, pt_regs_rdx(%rax)
+        movq    %rsp, pt_regs_sp(%rax)
+        movq    %rbp, pt_regs_bp(%rax)
+        movq    %rsi, pt_regs_si(%rax)
+        movq    %rdi, pt_regs_di(%rax)
+        movq    %rbx, pt_regs_bx(%rax)
+        movq    %rcx, pt_regs_cx(%rax)
+        movq    %rdx, pt_regs_dx(%rax)
         movq    %r8, pt_regs_r8(%rax)
         movq    %r9, pt_regs_r9(%rax)
         movq    %r10, pt_regs_r10(%rax)
@@ -360,7 +360,7 @@ do_suspend_lowlevel:
         movq    %r14, pt_regs_r14(%rax)
         movq    %r15, pt_regs_r15(%rax)
         pushfq
-        popq    pt_regs_eflags(%rax)
+        popq    pt_regs_flags(%rax)
 
         movq    $.L97, saved_rip(%rip)
 
@@ -391,15 +391,15 @@ do_suspend_lowlevel:
         movq    %rbx, %cr2
         movq    saved_context_cr0(%rax), %rbx
         movq    %rbx, %cr0
-        pushq   pt_regs_eflags(%rax)
+        pushq   pt_regs_flags(%rax)
         popfq
-        movq    pt_regs_rsp(%rax), %rsp
-        movq    pt_regs_rbp(%rax), %rbp
-        movq    pt_regs_rsi(%rax), %rsi
-        movq    pt_regs_rdi(%rax), %rdi
-        movq    pt_regs_rbx(%rax), %rbx
-        movq    pt_regs_rcx(%rax), %rcx
-        movq    pt_regs_rdx(%rax), %rdx
+        movq    pt_regs_sp(%rax), %rsp
+        movq    pt_regs_bp(%rax), %rbp
+        movq    pt_regs_si(%rax), %rsi
+        movq    pt_regs_di(%rax), %rdi
+        movq    pt_regs_bx(%rax), %rbx
+        movq    pt_regs_cx(%rax), %rcx
+        movq    pt_regs_dx(%rax), %rdx
         movq    pt_regs_r8(%rax), %r8
         movq    pt_regs_r9(%rax), %r9
         movq    pt_regs_r10(%rax), %r10
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index fd7464d23339..a3a8be7618d1 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -75,22 +75,22 @@ void foo(void)
         OFFSET(GDS_pad, Xgt_desc_struct, pad);
         BLANK();
 
-        OFFSET(PT_EBX, pt_regs, ebx);
-        OFFSET(PT_ECX, pt_regs, ecx);
-        OFFSET(PT_EDX, pt_regs, edx);
-        OFFSET(PT_ESI, pt_regs, esi);
-        OFFSET(PT_EDI, pt_regs, edi);
-        OFFSET(PT_EBP, pt_regs, ebp);
-        OFFSET(PT_EAX, pt_regs, eax);
-        OFFSET(PT_DS,  pt_regs, xds);
-        OFFSET(PT_ES,  pt_regs, xes);
-        OFFSET(PT_FS,  pt_regs, xfs);
-        OFFSET(PT_ORIG_EAX, pt_regs, orig_eax);
-        OFFSET(PT_EIP, pt_regs, eip);
-        OFFSET(PT_CS,  pt_regs, xcs);
-        OFFSET(PT_EFLAGS, pt_regs, eflags);
-        OFFSET(PT_OLDESP, pt_regs, esp);
-        OFFSET(PT_OLDSS,  pt_regs, xss);
+        OFFSET(PT_EBX, pt_regs, bx);
+        OFFSET(PT_ECX, pt_regs, cx);
+        OFFSET(PT_EDX, pt_regs, dx);
+        OFFSET(PT_ESI, pt_regs, si);
+        OFFSET(PT_EDI, pt_regs, di);
+        OFFSET(PT_EBP, pt_regs, bp);
+        OFFSET(PT_EAX, pt_regs, ax);
+        OFFSET(PT_DS,  pt_regs, ds);
+        OFFSET(PT_ES,  pt_regs, es);
+        OFFSET(PT_FS,  pt_regs, fs);
+        OFFSET(PT_ORIG_EAX, pt_regs, orig_ax);
+        OFFSET(PT_EIP, pt_regs, ip);
+        OFFSET(PT_CS,  pt_regs, cs);
+        OFFSET(PT_EFLAGS, pt_regs, flags);
+        OFFSET(PT_OLDESP, pt_regs, sp);
+        OFFSET(PT_OLDSS,  pt_regs, ss);
         BLANK();
 
         OFFSET(EXEC_DOMAIN_handler, exec_domain, handler);
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index c27c646214f4..2e918ebf21d3 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -83,14 +83,14 @@ int main(void)
         DEFINE(pbe_next, offsetof(struct pbe, next));
         BLANK();
 #define ENTRY(entry) DEFINE(pt_regs_ ## entry, offsetof(struct pt_regs, entry))
-        ENTRY(rbx);
-        ENTRY(rbx);
-        ENTRY(rcx);
-        ENTRY(rdx);
-        ENTRY(rsp);
-        ENTRY(rbp);
-        ENTRY(rsi);
-        ENTRY(rdi);
+        ENTRY(bx);
+        ENTRY(bx);
+        ENTRY(cx);
+        ENTRY(dx);
+        ENTRY(sp);
+        ENTRY(bp);
+        ENTRY(si);
+        ENTRY(di);
         ENTRY(r8);
         ENTRY(r9);
         ENTRY(r10);
@@ -99,7 +99,7 @@ int main(void)
         ENTRY(r13);
         ENTRY(r14);
         ENTRY(r15);
-        ENTRY(eflags);
+        ENTRY(flags);
         BLANK();
 #undef ENTRY
 #define ENTRY(entry) DEFINE(saved_context_ ## entry, offsetof(struct saved_context, entry))
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index e2fcf2051bdb..5db2a163bf4b 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -634,7 +634,7 @@ void __init early_cpu_init(void)
 struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
 {
         memset(regs, 0, sizeof(struct pt_regs));
-        regs->xfs = __KERNEL_PERCPU;
+        regs->fs = __KERNEL_PERCPU;
         return regs;
 }
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 3c7672c40cf4..0adad772d0da 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -110,12 +110,12 @@ static void print_mce(struct mce *m)
                KERN_EMERG
                "CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
                m->cpu, m->mcgstatus, m->bank, m->status);
-        if (m->rip) {
+        if (m->ip) {
                 printk(KERN_EMERG "RIP%s %02x:<%016Lx> ",
                        !(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
-                       m->cs, m->rip);
+                       m->cs, m->ip);
                 if (m->cs == __KERNEL_CS)
-                        print_symbol("{%s}", m->rip);
+                        print_symbol("{%s}", m->ip);
                 printk("\n");
         }
         printk(KERN_EMERG "TSC %Lx ", m->tsc);
@@ -156,16 +156,16 @@ static int mce_available(struct cpuinfo_x86 *c)
 static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
 {
         if (regs && (m->mcgstatus & MCG_STATUS_RIPV)) {
-                m->rip = regs->rip;
+                m->ip = regs->ip;
                 m->cs = regs->cs;
         } else {
-                m->rip = 0;
+                m->ip = 0;
                 m->cs = 0;
         }
         if (rip_msr) {
                 /* Assume the RIP in the MSR is exact. Is this true? */
                 m->mcgstatus |= MCG_STATUS_EIPV;
-                rdmsrl(rip_msr, m->rip);
+                rdmsrl(rip_msr, m->ip);
                 m->cs = 0;
         }
 }
@@ -288,7 +288,7 @@ void do_machine_check(struct pt_regs * regs, long error_code)
                  * instruction which caused the MCE.
                  */
                 if (m.mcgstatus & MCG_STATUS_EIPV)
-                        user_space = panicm.rip && (panicm.cs & 3);
+                        user_space = panicm.ip && (panicm.cs & 3);
 
                 /*
                  * If we know that the error was in user space, send a
diff --git a/arch/x86/kernel/i8259_32.c b/arch/x86/kernel/i8259_32.c
index 3321ce669295..f201e7da1bbc 100644
--- a/arch/x86/kernel/i8259_32.c
+++ b/arch/x86/kernel/i8259_32.c
@@ -339,7 +339,7 @@ static irqreturn_t math_error_irq(int cpl, void *dev_id)
         outb(0,0xF0);
         if (ignore_fpu_irq || !boot_cpu_data.hard_math)
                 return IRQ_NONE;
-        math_error((void __user *)get_irq_regs()->eip);
+        math_error((void __user *)get_irq_regs()->ip);
         return IRQ_HANDLED;
 }
 
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index 4ef85a3b3f9f..fa70005be5e8 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -1412,7 +1412,7 @@ static void irq_complete_move(unsigned int irq)
         if (likely(!cfg->move_in_progress))
                 return;
 
-        vector = ~get_irq_regs()->orig_rax;
+        vector = ~get_irq_regs()->orig_ax;
         me = smp_processor_id();
         if ((vector == cfg->vector) && cpu_isset(me, cfg->domain)) {
                 cpumask_t cleanup_mask;
diff --git a/arch/x86/kernel/ioport_32.c b/arch/x86/kernel/ioport_32.c
index c281ffa18259..9295e01ff49c 100644
--- a/arch/x86/kernel/ioport_32.c
+++ b/arch/x86/kernel/ioport_32.c
@@ -100,7 +100,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
  * beyond the 0x3ff range: to get the full 65536 ports bitmapped
  * you'd need 8kB of bitmaps/process, which is a bit excessive.
  *
- * Here we just change the eflags value on the stack: we allow
+ * Here we just change the flags value on the stack: we allow
  * only the super-user to do it. This depends on the stack-layout
  * on system-call entry - see also fork() and the signal handling
  * code.
@@ -109,8 +109,8 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 asmlinkage long sys_iopl(unsigned long regsp)
 {
         volatile struct pt_regs *regs = (struct pt_regs *)&regsp;
-        unsigned int level = regs->ebx;
-        unsigned int old = (regs->eflags >> 12) & 3;
+        unsigned int level = regs->bx;
+        unsigned int old = (regs->flags >> 12) & 3;
         struct thread_struct *t = &current->thread;
 
         if (level > 3)
@@ -122,7 +122,7 @@ asmlinkage long sys_iopl(unsigned long regsp)
         }
 
         t->iopl = level << 12;
-        regs->eflags = (regs->eflags & ~X86_EFLAGS_IOPL) | t->iopl;
+        regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | t->iopl;
         set_iopl_mask(t->iopl);
 
         return 0;
diff --git a/arch/x86/kernel/ioport_64.c b/arch/x86/kernel/ioport_64.c
index 5f62fad64dab..ff7514b757e5 100644
--- a/arch/x86/kernel/ioport_64.c
+++ b/arch/x86/kernel/ioport_64.c
@@ -95,7 +95,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
  * beyond the 0x3ff range: to get the full 65536 ports bitmapped
  * you'd need 8kB of bitmaps/process, which is a bit excessive.
  *
- * Here we just change the eflags value on the stack: we allow
+ * Here we just change the flags value on the stack: we allow
  * only the super-user to do it. This depends on the stack-layout
  * on system-call entry - see also fork() and the signal handling
  * code.
@@ -103,7 +103,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
 
 asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
 {
-        unsigned int old = (regs->eflags >> 12) & 3;
+        unsigned int old = (regs->flags >> 12) & 3;
 
         if (level > 3)
                 return -EINVAL;
@@ -112,6 +112,6 @@ asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
                 if (!capable(CAP_SYS_RAWIO))
                         return -EPERM;
         }
-        regs->eflags = (regs->eflags &~ X86_EFLAGS_IOPL) | (level << 12);
+        regs->flags = (regs->flags &~ X86_EFLAGS_IOPL) | (level << 12);
         return 0;
 }
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index d3fde94f7345..b49616bcc16b 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -70,7 +70,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 {       
         struct pt_regs *old_regs;
         /* high bit used in ret_from_ code */
-        int irq = ~regs->orig_eax;
+        int irq = ~regs->orig_ax;
         struct irq_desc *desc = irq_desc + irq;
 #ifdef CONFIG_4KSTACKS
         union irq_ctx *curctx, *irqctx;
@@ -88,13 +88,13 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
         /* Debugging check for stack overflow: is there less than 1KB free? */
         {
-                long esp;
+                long sp;
 
                 __asm__ __volatile__("andl %%esp,%0" :
-                                        "=r" (esp) : "0" (THREAD_SIZE - 1));
-                if (unlikely(esp < (sizeof(struct thread_info) + STACK_WARN))) {
+                                        "=r" (sp) : "0" (THREAD_SIZE - 1));
+                if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) {
                         printk("do_IRQ: stack overflow: %ld\n",
-                                esp - sizeof(struct thread_info));
+                                sp - sizeof(struct thread_info));
                         dump_stack();
                 }
         }
@@ -112,7 +112,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
          * current stack (which is the irq stack already after all)
          */
         if (curctx != irqctx) {
-                int arg1, arg2, ebx;
+                int arg1, arg2, bx;
 
                 /* build the stack frame on the IRQ stack */
                 isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
@@ -128,10 +128,10 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
                         (curctx->tinfo.preempt_count & SOFTIRQ_MASK);
 
                 asm volatile(
-                        "       xchgl  %%ebx,%%esp      \n"
-                        "       call   *%%edi           \n"
-                        "       movl   %%ebx,%%esp      \n"
-                        : "=a" (arg1), "=d" (arg2), "=b" (ebx)
+                        "       xchgl  %%ebx,%%esp    \n"
+                        "       call   *%%edi         \n"
+                        "       movl   %%ebx,%%esp    \n"
+                        : "=a" (arg1), "=d" (arg2), "=b" (bx)
                         :  "0" (irq),   "1" (desc),  "2" (isp),
                            "D" (desc->handle_irq)
                         : "memory", "cc"
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 6c3a3b6e5cf4..3aac15466a91 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -53,11 +53,11 @@ static inline void stack_overflow_check(struct pt_regs *regs)
         u64 curbase = (u64)task_stack_page(current);
         static unsigned long warned = -60*HZ;
 
-        if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
-            regs->rsp <  curbase + sizeof(struct thread_info) + 128 &&
+        if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
+            regs->sp <  curbase + sizeof(struct thread_info) + 128 &&
             time_after(jiffies, warned + 60*HZ)) {
-                printk("do_IRQ: %s near stack overflow (cur:%Lx,rsp:%lx)\n",
-                       current->comm, curbase, regs->rsp);
+                printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
+                       current->comm, curbase, regs->sp);
                 show_stack(NULL,NULL);
                 warned = jiffies;
         }
@@ -162,7 +162,7 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
         struct pt_regs *old_regs = set_irq_regs(regs);
 
         /* high bit used in ret_from_ code  */
-        unsigned vector = ~regs->orig_rax;
+        unsigned vector = ~regs->orig_ax;
         unsigned irq;
 
         exit_idle();
diff --git a/arch/x86/kernel/kprobes_32.c b/arch/x86/kernel/kprobes_32.c
index bc4a68367cd0..d708cd4f956f 100644
--- a/arch/x86/kernel/kprobes_32.c
+++ b/arch/x86/kernel/kprobes_32.c
@@ -212,7 +212,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
 {
         __get_cpu_var(current_kprobe) = p;
         kcb->kprobe_saved_eflags = kcb->kprobe_old_eflags
-                = (regs->eflags & (TF_MASK | IF_MASK));
+                = (regs->flags & (TF_MASK | IF_MASK));
         if (is_IF_modifier(p->opcode))
                 kcb->kprobe_saved_eflags &= ~IF_MASK;
 }
@@ -232,20 +232,20 @@ static __always_inline void restore_btf(void)
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
         clear_btf();
-        regs->eflags |= TF_MASK;
-        regs->eflags &= ~IF_MASK;
+        regs->flags |= TF_MASK;
+        regs->flags &= ~IF_MASK;
         /*single step inline if the instruction is an int3*/
         if (p->opcode == BREAKPOINT_INSTRUCTION)
-                regs->eip = (unsigned long)p->addr;
+                regs->ip = (unsigned long)p->addr;
         else
-                regs->eip = (unsigned long)p->ainsn.insn;
+                regs->ip = (unsigned long)p->ainsn.insn;
 }
 
 /* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
-        unsigned long *sara = (unsigned long *)&regs->esp;
+        unsigned long *sara = (unsigned long *)&regs->sp;
 
         ri->ret_addr = (kprobe_opcode_t *) *sara;
 
@@ -264,7 +264,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
         kprobe_opcode_t *addr;
         struct kprobe_ctlblk *kcb;
 
-        addr = (kprobe_opcode_t *)(regs->eip - sizeof(kprobe_opcode_t));
+        addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t));
 
         /*
          * We don't want to be preempted for the entire
@@ -279,8 +279,8 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
                 if (p) {
                         if (kcb->kprobe_status == KPROBE_HIT_SS &&
                                 *p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
-                                regs->eflags &= ~TF_MASK;
-                                regs->eflags |= kcb->kprobe_saved_eflags;
+                                regs->flags &= ~TF_MASK;
+                                regs->flags |= kcb->kprobe_saved_eflags;
                                 goto no_kprobe;
                         }
                         /* We have reentered the kprobe_handler(), since
@@ -301,7 +301,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
                          * another cpu right after we hit, no further
                          * handling of this interrupt is appropriate
                          */
-                                regs->eip -= sizeof(kprobe_opcode_t);
+                                regs->ip -= sizeof(kprobe_opcode_t);
                                 ret = 1;
                                 goto no_kprobe;
                         }
@@ -325,7 +325,7 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
                          * Back up over the (now missing) int3 and run
                          * the original instruction.
                          */
-                        regs->eip -= sizeof(kprobe_opcode_t);
+                        regs->ip -= sizeof(kprobe_opcode_t);
                         ret = 1;
                 }
                 /* Not one of ours: let kernel handle it */
@@ -344,7 +344,7 @@ ss_probe:
         if (p->ainsn.boostable == 1 && !p->post_handler){
                 /* Boost up -- we can execute copied instructions directly */
                 reset_current_kprobe();
-                regs->eip = (unsigned long)p->ainsn.insn;
+                regs->ip = (unsigned long)p->ainsn.insn;
                 preempt_enable_no_resched();
                 return 1;
         }
@@ -368,7 +368,7 @@ no_kprobe:
         asm volatile ( ".global kretprobe_trampoline\n"
                         "kretprobe_trampoline: \n"
                         "       pushf\n"
-                        /* skip cs, eip, orig_eax */
+                        /* skip cs, ip, orig_ax */
                         "       subl $12, %esp\n"
                         "       pushl %fs\n"
                         "       pushl %ds\n"
@@ -382,10 +382,10 @@ no_kprobe:
                         "       pushl %ebx\n"
                         "       movl %esp, %eax\n"
                         "       call trampoline_handler\n"
-                        /* move eflags to cs */
+                        /* move flags to cs */
                         "       movl 52(%esp), %edx\n"
                         "       movl %edx, 48(%esp)\n"
-                        /* save true return address on eflags */
+                        /* save true return address on flags */
                         "       movl %eax, 52(%esp)\n"
                         "       popl %ebx\n"
                         "       popl %ecx\n"
@@ -394,7 +394,7 @@ no_kprobe:
                         "       popl %edi\n"
                         "       popl %ebp\n"
                         "       popl %eax\n"
-                        /* skip eip, orig_eax, es, ds, fs */
+                        /* skip ip, orig_ax, es, ds, fs */
                         "       addl $20, %esp\n"
                         "       popf\n"
                         "       ret\n");
@@ -415,9 +415,9 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
         spin_lock_irqsave(&kretprobe_lock, flags);
         head = kretprobe_inst_table_head(current);
         /* fixup registers */
-        regs->xcs = __KERNEL_CS | get_kernel_rpl();
-        regs->eip = trampoline_address;
-        regs->orig_eax = 0xffffffff;
+        regs->cs = __KERNEL_CS | get_kernel_rpl();
+        regs->ip = trampoline_address;
+        regs->orig_ax = 0xffffffff;
 
         /*
          * It is possible to have multiple instances associated with a given
@@ -478,11 +478,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
  * interrupt.  We have to fix up the stack as follows:
  *
  * 0) Except in the case of absolute or indirect jump or call instructions,
- * the new eip is relative to the copied instruction.  We need to make
+ * the new ip is relative to the copied instruction.  We need to make
  * it relative to the original instruction.
  *
  * 1) If the single-stepped instruction was pushfl, then the TF and IF
- * flags are set in the just-pushed eflags, and may need to be cleared.
+ * flags are set in the just-pushed flags, and may need to be cleared.
  *
  * 2) If the single-stepped instruction was a call, the return address
  * that is atop the stack is the address following the copied instruction.
@@ -493,11 +493,11 @@ fastcall void *__kprobes trampoline_handler(struct pt_regs *regs)
 static void __kprobes resume_execution(struct kprobe *p,
                 struct pt_regs *regs, struct kprobe_ctlblk *kcb)
 {
-        unsigned long *tos = (unsigned long *)&regs->esp;
+        unsigned long *tos = (unsigned long *)&regs->sp;
         unsigned long copy_eip = (unsigned long)p->ainsn.insn;
         unsigned long orig_eip = (unsigned long)p->addr;
 
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         switch (p->ainsn.insn[0]) {
         case 0x9c:              /* pushfl */
                 *tos &= ~(TF_MASK | IF_MASK);
@@ -508,8 +508,8 @@ static void __kprobes resume_execution(struct kprobe *p,
         case 0xca:
         case 0xcb:
         case 0xcf:
-        case 0xea:              /* jmp absolute -- eip is correct */
-                /* eip is already adjusted, no more changes required */
+        case 0xea:              /* jmp absolute -- ip is correct */
+                /* ip is already adjusted, no more changes required */
                 p->ainsn.boostable = 1;
                 goto no_change;
         case 0xe8:              /* call relative - Fix return addr */
@@ -522,14 +522,14 @@ static void __kprobes resume_execution(struct kprobe *p,
                 if ((p->ainsn.insn[1] & 0x30) == 0x10) {
                         /*
                          * call absolute, indirect
-                         * Fix return addr; eip is correct.
+                         * Fix return addr; ip is correct.
                          * But this is not boostable
                          */
                         *tos = orig_eip + (*tos - copy_eip);
                         goto no_change;
                 } else if (((p->ainsn.insn[1] & 0x31) == 0x20) ||       /* jmp near, absolute indirect */
                            ((p->ainsn.insn[1] & 0x31) == 0x21)) {       /* jmp far, absolute indirect */
-                        /* eip is correct. And this is boostable */
+                        /* ip is correct. And this is boostable */
                         p->ainsn.boostable = 1;
                         goto no_change;
                 }
@@ -538,21 +538,21 @@ static void __kprobes resume_execution(struct kprobe *p,
         }
 
         if (p->ainsn.boostable == 0) {
-                if ((regs->eip > copy_eip) &&
-                    (regs->eip - copy_eip) + 5 < MAX_INSN_SIZE) {
+                if ((regs->ip > copy_eip) &&
+                    (regs->ip - copy_eip) + 5 < MAX_INSN_SIZE) {
                         /*
                          * These instructions can be executed directly if it
                          * jumps back to correct address.
                          */
-                        set_jmp_op((void *)regs->eip,
-                                   (void *)orig_eip + (regs->eip - copy_eip));
+                        set_jmp_op((void *)regs->ip,
+                                   (void *)orig_eip + (regs->ip - copy_eip));
                         p->ainsn.boostable = 1;
                 } else {
                         p->ainsn.boostable = -1;
                 }
         }
 
-        regs->eip = orig_eip + (regs->eip - copy_eip);
+        regs->ip = orig_eip + (regs->ip - copy_eip);
 
 no_change:
         restore_btf();
@@ -578,8 +578,8 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
         }
 
         resume_execution(cur, regs, kcb);
-        regs->eflags |= kcb->kprobe_saved_eflags;
-        trace_hardirqs_fixup_flags(regs->eflags);
+        regs->flags |= kcb->kprobe_saved_eflags;
+        trace_hardirqs_fixup_flags(regs->flags);
 
         /*Restore back the original saved kprobes variables and continue. */
         if (kcb->kprobe_status == KPROBE_REENTER) {
@@ -591,11 +591,11 @@ out:
         preempt_enable_no_resched();
 
         /*
-         * if somebody else is singlestepping across a probe point, eflags
+         * if somebody else is singlestepping across a probe point, flags
          * will have TF set, in which case, continue the remaining processing
          * of do_debug, as if this is not a probe hit.
          */
-        if (regs->eflags & TF_MASK)
+        if (regs->flags & TF_MASK)
                 return 0;
 
         return 1;
@@ -612,12 +612,12 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                 /*
                  * We are here because the instruction being single
                  * stepped caused a page fault. We reset the current
-                 * kprobe and the eip points back to the probe address
+                 * kprobe and the ip points back to the probe address
                  * and allow the page fault handler to continue as a
                  * normal page fault.
                  */
-                regs->eip = (unsigned long)cur->addr;
-                regs->eflags |= kcb->kprobe_old_eflags;
+                regs->ip = (unsigned long)cur->addr;
+                regs->flags |= kcb->kprobe_old_eflags;
                 if (kcb->kprobe_status == KPROBE_REENTER)
                         restore_previous_kprobe(kcb);
                 else
@@ -703,7 +703,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
         struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
 
         kcb->jprobe_saved_regs = *regs;
-        kcb->jprobe_saved_esp = &regs->esp;
+        kcb->jprobe_saved_esp = &regs->sp;
         addr = (unsigned long)(kcb->jprobe_saved_esp);
 
         /*
@@ -715,9 +715,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
          */
         memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
                         MIN_STACK_SIZE(addr));
-        regs->eflags &= ~IF_MASK;
+        regs->flags &= ~IF_MASK;
         trace_hardirqs_off();
-        regs->eip = (unsigned long)(jp->entry);
+        regs->ip = (unsigned long)(jp->entry);
         return 1;
 }
 
@@ -736,15 +736,15 @@ void __kprobes jprobe_return(void)
 int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
 {
         struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-        u8 *addr = (u8 *) (regs->eip - 1);
+        u8 *addr = (u8 *) (regs->ip - 1);
         unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_esp);
         struct jprobe *jp = container_of(p, struct jprobe, kp);
 
         if ((addr > (u8 *) jprobe_return) && (addr < (u8 *) jprobe_return_end)) {
-                if (&regs->esp != kcb->jprobe_saved_esp) {
+                if (&regs->sp != kcb->jprobe_saved_esp) {
                         struct pt_regs *saved_regs = &kcb->jprobe_saved_regs;
-                        printk("current esp %p does not match saved esp %p\n",
-                               &regs->esp, kcb->jprobe_saved_esp);
+                        printk("current sp %p does not match saved sp %p\n",
+                               &regs->sp, kcb->jprobe_saved_esp);
                         printk("Saved registers for jprobe %p\n", jp);
                         show_registers(saved_regs);
                         printk("Current registers\n");
diff --git a/arch/x86/kernel/kprobes_64.c b/arch/x86/kernel/kprobes_64.c
index 10d66e323c7d..f6837cd3bed5 100644
--- a/arch/x86/kernel/kprobes_64.c
+++ b/arch/x86/kernel/kprobes_64.c
@@ -251,7 +251,7 @@ static void __kprobes set_current_kprobe(struct kprobe *p, struct pt_regs *regs,
 {
         __get_cpu_var(current_kprobe) = p;
         kcb->kprobe_saved_rflags = kcb->kprobe_old_rflags
-                = (regs->eflags & (TF_MASK | IF_MASK));
+                = (regs->flags & (TF_MASK | IF_MASK));
         if (is_IF_modifier(p->ainsn.insn))
                 kcb->kprobe_saved_rflags &= ~IF_MASK;
 }
@@ -271,20 +271,20 @@ static __always_inline void restore_btf(void)
 static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 {
         clear_btf();
-        regs->eflags |= TF_MASK;
-        regs->eflags &= ~IF_MASK;
+        regs->flags |= TF_MASK;
+        regs->flags &= ~IF_MASK;
         /*single step inline if the instruction is an int3*/
         if (p->opcode == BREAKPOINT_INSTRUCTION)
-                regs->rip = (unsigned long)p->addr;
+                regs->ip = (unsigned long)p->addr;
         else
-                regs->rip = (unsigned long)p->ainsn.insn;
+                regs->ip = (unsigned long)p->ainsn.insn;
 }
 
 /* Called with kretprobe_lock held */
 void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
                                       struct pt_regs *regs)
 {
-        unsigned long *sara = (unsigned long *)regs->rsp;
+        unsigned long *sara = (unsigned long *)regs->sp;
 
         ri->ret_addr = (kprobe_opcode_t *) *sara;
         /* Replace the return addr with trampoline addr */
@@ -295,7 +295,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
 {
         struct kprobe *p;
         int ret = 0;
-        kprobe_opcode_t *addr = (kprobe_opcode_t *)(regs->rip - sizeof(kprobe_opcode_t));
+        kprobe_opcode_t *addr = (kprobe_opcode_t *)(regs->ip - sizeof(kprobe_opcode_t));
         struct kprobe_ctlblk *kcb;
 
         /*
@@ -311,8 +311,8 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
                 if (p) {
                         if (kcb->kprobe_status == KPROBE_HIT_SS &&
                                 *p->ainsn.insn == BREAKPOINT_INSTRUCTION) {
-                                regs->eflags &= ~TF_MASK;
-                                regs->eflags |= kcb->kprobe_saved_rflags;
+                                regs->flags &= ~TF_MASK;
+                                regs->flags |= kcb->kprobe_saved_rflags;
                                 goto no_kprobe;
                         } else if (kcb->kprobe_status == KPROBE_HIT_SSDONE) {
                                 /* TODO: Provide re-entrancy from
@@ -321,7 +321,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
                                  * the instruction of the new probe.
                                  */
                                 arch_disarm_kprobe(p);
-                                regs->rip = (unsigned long)p->addr;
+                                regs->ip = (unsigned long)p->addr;
                                 reset_current_kprobe();
                                 ret = 1;
                         } else {
@@ -345,7 +345,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
                          * another cpu right after we hit, no further
                          * handling of this interrupt is appropriate
                          */
-                                regs->rip = (unsigned long)addr;
+                                regs->ip = (unsigned long)addr;
                                 ret = 1;
                                 goto no_kprobe;
                         }
@@ -369,7 +369,7 @@ int __kprobes kprobe_handler(struct pt_regs *regs)
                          * Back up over the (now missing) int3 and run
                          * the original instruction.
                          */
-                        regs->rip = (unsigned long)addr;
+                        regs->ip = (unsigned long)addr;
                         ret = 1;
                 }
                 /* Not one of ours: let kernel handle it */
@@ -454,7 +454,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
         }
 
         kretprobe_assert(ri, orig_ret_address, trampoline_address);
-        regs->rip = orig_ret_address;
+        regs->ip = orig_ret_address;
 
         reset_current_kprobe();
         spin_unlock_irqrestore(&kretprobe_lock, flags);
@@ -484,11 +484,11 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
  * interrupt.  We have to fix up the stack as follows:
  *
  * 0) Except in the case of absolute or indirect jump or call instructions,
- * the new rip is relative to the copied instruction.  We need to make
+ * the new ip is relative to the copied instruction.  We need to make
  * it relative to the original instruction.
  *
  * 1) If the single-stepped instruction was pushfl, then the TF and IF
- * flags are set in the just-pushed eflags, and may need to be cleared.
+ * flags are set in the just-pushed flags, and may need to be cleared.
  *
  * 2) If the single-stepped instruction was a call, the return address
  * that is atop the stack is the address following the copied instruction.
@@ -497,7 +497,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 static void __kprobes resume_execution(struct kprobe *p,
                 struct pt_regs *regs, struct kprobe_ctlblk *kcb)
 {
-        unsigned long *tos = (unsigned long *)regs->rsp;
+        unsigned long *tos = (unsigned long *)regs->sp;
         unsigned long copy_rip = (unsigned long)p->ainsn.insn;
         unsigned long orig_rip = (unsigned long)p->addr;
         kprobe_opcode_t *insn = p->ainsn.insn;
@@ -506,7 +506,7 @@ static void __kprobes resume_execution(struct kprobe *p,
         if (*insn >= 0x40 && *insn <= 0x4f)
                 insn++;
 
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         switch (*insn) {
         case 0x9c:      /* pushfl */
                 *tos &= ~(TF_MASK | IF_MASK);
@@ -538,7 +538,8 @@ static void __kprobes resume_execution(struct kprobe *p,
                 break;
         }
 
-        regs->rip = orig_rip + (regs->rip - copy_rip);
+        regs->ip = orig_rip + (regs->ip - copy_rip);
+
 no_change:
         restore_btf();
 
@@ -559,8 +560,8 @@ int __kprobes post_kprobe_handler(struct pt_regs *regs)
         }
 
         resume_execution(cur, regs, kcb);
-        regs->eflags |= kcb->kprobe_saved_rflags;
-        trace_hardirqs_fixup_flags(regs->eflags);
+        regs->flags |= kcb->kprobe_saved_rflags;
+        trace_hardirqs_fixup_flags(regs->flags);
 
         /* Restore the original saved kprobes variables and continue. */
         if (kcb->kprobe_status == KPROBE_REENTER) {
@@ -572,11 +573,11 @@ out:
         preempt_enable_no_resched();
 
         /*
-         * if somebody else is singlestepping across a probe point, eflags
+         * if somebody else is singlestepping across a probe point, flags
          * will have TF set, in which case, continue the remaining processing
          * of do_debug, as if this is not a probe hit.
          */
-        if (regs->eflags & TF_MASK)
+        if (regs->flags & TF_MASK)
                 return 0;
 
         return 1;
@@ -594,12 +595,12 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                 /*
                  * We are here because the instruction being single
                  * stepped caused a page fault. We reset the current
-                 * kprobe and the rip points back to the probe address
+                 * kprobe and the ip points back to the probe address
                  * and allow the page fault handler to continue as a
                  * normal page fault.
                  */
-                regs->rip = (unsigned long)cur->addr;
-                regs->eflags |= kcb->kprobe_old_rflags;
+                regs->ip = (unsigned long)cur->addr;
+                regs->flags |= kcb->kprobe_old_rflags;
                 if (kcb->kprobe_status == KPROBE_REENTER)
                         restore_previous_kprobe(kcb);
                 else
@@ -629,9 +630,9 @@ int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
                  * In case the user-specified fault handler returned
                  * zero, try to fix up.
                  */
-                fixup = search_exception_tables(regs->rip);
+                fixup = search_exception_tables(regs->ip);
                 if (fixup) {
-                        regs->rip = fixup->fixup;
+                        regs->ip = fixup->fixup;
                         return 1;
                 }
 
@@ -688,7 +689,7 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
         struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
 
         kcb->jprobe_saved_regs = *regs;
-        kcb->jprobe_saved_rsp = (long *) regs->rsp;
+        kcb->jprobe_saved_rsp = (long *) regs->sp;
         addr = (unsigned long)(kcb->jprobe_saved_rsp);
         /*
          * As Linus pointed out, gcc assumes that the callee
@@ -699,9 +700,9 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
          */
         memcpy(kcb->jprobes_stack, (kprobe_opcode_t *)addr,
                         MIN_STACK_SIZE(addr));
-        regs->eflags &= ~IF_MASK;
+        regs->flags &= ~IF_MASK;
         trace_hardirqs_off();
-        regs->rip = (unsigned long)(jp->entry);
+        regs->ip = (unsigned long)(jp->entry);
         return 1;
 }
 
@@ -720,15 +721,15 @@ void __kprobes jprobe_return(void)
 int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
 {
         struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
-        u8 *addr = (u8 *) (regs->rip - 1);
+        u8 *addr = (u8 *) (regs->ip - 1);
         unsigned long stack_addr = (unsigned long)(kcb->jprobe_saved_rsp);
         struct jprobe *jp = container_of(p, struct jprobe, kp);
 
         if ((addr > (u8 *) jprobe_return) && (addr < (u8 *) jprobe_return_end)) {
-                if ((unsigned long *)regs->rsp != kcb->jprobe_saved_rsp) {
+                if ((unsigned long *)regs->sp != kcb->jprobe_saved_rsp) {
                         struct pt_regs *saved_regs = &kcb->jprobe_saved_regs;
-                        printk("current rsp %p does not match saved rsp %p\n",
-                               (long *)regs->rsp, kcb->jprobe_saved_rsp);
+                        printk("current sp %p does not match saved sp %p\n",
+                               (long *)regs->sp, kcb->jprobe_saved_rsp);
                         printk("Saved registers for jprobe %p\n", jp);
                         show_registers(saved_regs);
                         printk("Current registers\n");
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index d5462f228daf..c9f28e02e86d 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -265,13 +265,13 @@ EXPORT_SYMBOL_GPL(cpu_idle_wait);
  * New with Core Duo processors, MWAIT can take some hints based on CPU
  * capability.
  */
-void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
+void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
         if (!need_resched()) {
                 __monitor((void *)&current_thread_info()->flags, 0, 0);
                 smp_mb();
                 if (!need_resched())
-                        __mwait(eax, ecx);
+                        __mwait(ax, cx);
         }
 }
 
@@ -320,15 +320,15 @@ void __show_registers(struct pt_regs *regs, int all)
 {
         unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
         unsigned long d0, d1, d2, d3, d6, d7;
-        unsigned long esp;
+        unsigned long sp;
         unsigned short ss, gs;
 
         if (user_mode_vm(regs)) {
-                esp = regs->esp;
-                ss = regs->xss & 0xffff;
+                sp = regs->sp;
+                ss = regs->ss & 0xffff;
                 savesegment(gs, gs);
         } else {
-                esp = (unsigned long) (&regs->esp);
+                sp = (unsigned long) (&regs->sp);
                 savesegment(ss, ss);
                 savesegment(gs, gs);
         }
@@ -341,17 +341,17 @@ void __show_registers(struct pt_regs *regs, int all)
                         init_utsname()->version);
 
         printk("EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
-                        0xffff & regs->xcs, regs->eip, regs->eflags,
+                        0xffff & regs->cs, regs->ip, regs->flags,
                         smp_processor_id());
-        print_symbol("EIP is at %s\n", regs->eip);
+        print_symbol("EIP is at %s\n", regs->ip);
 
         printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
-                regs->eax, regs->ebx, regs->ecx, regs->edx);
+                regs->ax, regs->bx, regs->cx, regs->dx);
         printk("ESI: %08lx EDI: %08lx EBP: %08lx ESP: %08lx\n",
-                regs->esi, regs->edi, regs->ebp, esp);
+                regs->si, regs->di, regs->bp, sp);
         printk(" DS: %04x ES: %04x FS: %04x GS: %04x SS: %04x\n",
-               regs->xds & 0xffff, regs->xes & 0xffff,
-               regs->xfs & 0xffff, gs, ss);
+               regs->ds & 0xffff, regs->es & 0xffff,
+               regs->fs & 0xffff, gs, ss);
 
         if (!all)
                 return;
@@ -379,12 +379,12 @@ void __show_registers(struct pt_regs *regs, int all)
 void show_regs(struct pt_regs *regs)
 {
         __show_registers(regs, 1);
-        show_trace(NULL, regs, &regs->esp);
+        show_trace(NULL, regs, &regs->sp);
 }
 
 /*
- * This gets run with %ebx containing the
- * function to call, and %edx containing
+ * This gets run with %bx containing the
+ * function to call, and %dx containing
  * the "args".
  */
 extern void kernel_thread_helper(void);
@@ -398,16 +398,16 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
 
         memset(&regs, 0, sizeof(regs));
 
-        regs.ebx = (unsigned long) fn;
-        regs.edx = (unsigned long) arg;
+        regs.bx = (unsigned long) fn;
+        regs.dx = (unsigned long) arg;
 
-        regs.xds = __USER_DS;
-        regs.xes = __USER_DS;
-        regs.xfs = __KERNEL_PERCPU;
-        regs.orig_eax = -1;
-        regs.eip = (unsigned long) kernel_thread_helper;
-        regs.xcs = __KERNEL_CS | get_kernel_rpl();
-        regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
+        regs.ds = __USER_DS;
+        regs.es = __USER_DS;
+        regs.fs = __KERNEL_PERCPU;
+        regs.orig_ax = -1;
+        regs.ip = (unsigned long) kernel_thread_helper;
+        regs.cs = __KERNEL_CS | get_kernel_rpl();
+        regs.flags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
 
         /* Ok, create the new process.. */
         return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
@@ -470,7 +470,7 @@ void prepare_to_copy(struct task_struct *tsk)
         unlazy_fpu(tsk);
 }
 
-int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
+int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
         unsigned long unused,
         struct task_struct * p, struct pt_regs * regs)
 {
@@ -480,8 +480,8 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
 
         childregs = task_pt_regs(p);
         *childregs = *regs;
-        childregs->eax = 0;
-        childregs->esp = esp;
+        childregs->ax = 0;
+        childregs->sp = sp;
 
         p->thread.esp = (unsigned long) childregs;
         p->thread.esp0 = (unsigned long) (childregs+1);
@@ -508,7 +508,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long esp,
          */
         if (clone_flags & CLONE_SETTLS)
                 err = do_set_thread_area(p, -1,
-                        (struct user_desc __user *)childregs->esi, 0);
+                        (struct user_desc __user *)childregs->si, 0);
 
         if (err && p->thread.io_bitmap_ptr) {
                 kfree(p->thread.io_bitmap_ptr);
@@ -527,7 +527,7 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
 /* changed the size calculations - should hopefully work better. lbt */
         dump->magic = CMAGIC;
         dump->start_code = 0;
-        dump->start_stack = regs->esp & ~(PAGE_SIZE - 1);
+        dump->start_stack = regs->sp & ~(PAGE_SIZE - 1);
         dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
         dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
         dump->u_dsize -= dump->u_tsize;
@@ -538,23 +538,23 @@ void dump_thread(struct pt_regs * regs, struct user * dump)
         if (dump->start_stack < TASK_SIZE)
                 dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
 
-        dump->regs.ebx = regs->ebx;
-        dump->regs.ecx = regs->ecx;
-        dump->regs.edx = regs->edx;
-        dump->regs.esi = regs->esi;
-        dump->regs.edi = regs->edi;
-        dump->regs.ebp = regs->ebp;
-        dump->regs.eax = regs->eax;
-        dump->regs.ds = regs->xds;
-        dump->regs.es = regs->xes;
-        dump->regs.fs = regs->xfs;
+        dump->regs.ebx = regs->bx;
+        dump->regs.ecx = regs->cx;
+        dump->regs.edx = regs->dx;
+        dump->regs.esi = regs->si;
+        dump->regs.edi = regs->di;
+        dump->regs.ebp = regs->bp;
+        dump->regs.eax = regs->ax;
+        dump->regs.ds = regs->ds;
+        dump->regs.es = regs->es;
+        dump->regs.fs = regs->fs;
         savesegment(gs,dump->regs.gs);
-        dump->regs.orig_eax = regs->orig_eax;
-        dump->regs.eip = regs->eip;
-        dump->regs.cs = regs->xcs;
-        dump->regs.eflags = regs->eflags;
-        dump->regs.esp = regs->esp;
-        dump->regs.ss = regs->xss;
+        dump->regs.orig_eax = regs->orig_ax;
+        dump->regs.eip = regs->ip;
+        dump->regs.cs = regs->cs;
+        dump->regs.eflags = regs->flags;
+        dump->regs.esp = regs->sp;
+        dump->regs.ss = regs->ss;
 
         dump->u_fpvalid = dump_fpu (regs, &dump->i387);
 }
@@ -566,10 +566,10 @@ EXPORT_SYMBOL(dump_thread);
 int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
 {
         struct pt_regs ptregs = *task_pt_regs(tsk);
-        ptregs.xcs &= 0xffff;
-        ptregs.xds &= 0xffff;
-        ptregs.xes &= 0xffff;
-        ptregs.xss &= 0xffff;
+        ptregs.cs &= 0xffff;
+        ptregs.ds &= 0xffff;
+        ptregs.es &= 0xffff;
+        ptregs.ss &= 0xffff;
 
         elf_core_copy_regs(regs, &ptregs);
 
@@ -684,7 +684,7 @@ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
  * More important, however, is the fact that this allows us much
  * more flexibility.
  *
- * The return value (in %eax) will be the "prev" task after
+ * The return value (in %ax) will be the "prev" task after
  * the task-switch, and shows up in ret_from_fork in entry.S,
  * for example.
  */
@@ -771,7 +771,7 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
 
 asmlinkage int sys_fork(struct pt_regs regs)
 {
-        return do_fork(SIGCHLD, regs.esp, &regs, 0, NULL, NULL);
+        return do_fork(SIGCHLD, regs.sp, &regs, 0, NULL, NULL);
 }
 
 asmlinkage int sys_clone(struct pt_regs regs)
@@ -780,12 +780,12 @@ asmlinkage int sys_clone(struct pt_regs regs)
         unsigned long newsp;
         int __user *parent_tidptr, *child_tidptr;
 
-        clone_flags = regs.ebx;
-        newsp = regs.ecx;
-        parent_tidptr = (int __user *)regs.edx;
-        child_tidptr = (int __user *)regs.edi;
+        clone_flags = regs.bx;
+        newsp = regs.cx;
+        parent_tidptr = (int __user *)regs.dx;
+        child_tidptr = (int __user *)regs.di;
         if (!newsp)
-                newsp = regs.esp;
+                newsp = regs.sp;
         return do_fork(clone_flags, newsp, &regs, 0, parent_tidptr, child_tidptr);
 }
 
@@ -801,7 +801,7 @@ asmlinkage int sys_clone(struct pt_regs regs)
  */
 asmlinkage int sys_vfork(struct pt_regs regs)
 {
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.esp, &regs, 0, NULL, NULL);
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs.sp, &regs, 0, NULL, NULL);
 }
 
 /*
@@ -812,13 +812,13 @@ asmlinkage int sys_execve(struct pt_regs regs)
         int error;
         char * filename;
 
-        filename = getname((char __user *) regs.ebx);
+        filename = getname((char __user *) regs.bx);
         error = PTR_ERR(filename);
         if (IS_ERR(filename))
                 goto out;
         error = do_execve(filename,
-                        (char __user * __user *) regs.ecx,
-                        (char __user * __user *) regs.edx,
+                        (char __user * __user *) regs.cx,
+                        (char __user * __user *) regs.dx,
                         &regs);
         if (error == 0) {
                 /* Make sure we don't return using sysenter.. */
@@ -834,24 +834,24 @@ out:
 
 unsigned long get_wchan(struct task_struct *p)
 {
-        unsigned long ebp, esp, eip;
+        unsigned long bp, sp, ip;
         unsigned long stack_page;
         int count = 0;
         if (!p || p == current || p->state == TASK_RUNNING)
                 return 0;
         stack_page = (unsigned long)task_stack_page(p);
-        esp = p->thread.esp;
-        if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
+        sp = p->thread.esp;
+        if (!stack_page || sp < stack_page || sp > top_esp+stack_page)
                 return 0;
-        /* include/asm-i386/system.h:switch_to() pushes ebp last. */
-        ebp = *(unsigned long *) esp;
+        /* include/asm-i386/system.h:switch_to() pushes bp last. */
+        bp = *(unsigned long *) sp;
         do {
-                if (ebp < stack_page || ebp > top_ebp+stack_page)
+                if (bp < stack_page || bp > top_ebp+stack_page)
                         return 0;
-                eip = *(unsigned long *) (ebp+4);
-                if (!in_sched_functions(eip))
-                        return eip;
-                ebp = *(unsigned long *) ebp;
+                ip = *(unsigned long *) (bp+4);
+                if (!in_sched_functions(ip))
+                        return ip;
+                bp = *(unsigned long *) bp;
         } while (count++ < 16);
         return 0;
 }
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ae5eca17aa3c..efbb1a2eab97 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -257,13 +257,13 @@ void cpu_idle(void)
  * New with Core Duo processors, MWAIT can take some hints based on CPU
  * capability.
  */
-void mwait_idle_with_hints(unsigned long eax, unsigned long ecx)
+void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
         if (!need_resched()) {
                 __monitor((void *)&current_thread_info()->flags, 0, 0);
                 smp_mb();
                 if (!need_resched())
-                        __mwait(eax, ecx);
+                        __mwait(ax, cx);
         }
 }
 
@@ -330,16 +330,16 @@ void __show_regs(struct pt_regs * regs)
                 init_utsname()->release,
                 (int)strcspn(init_utsname()->version, " "),
                 init_utsname()->version);
-        printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
-        printk_address(regs->rip); 
-        printk("RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp,
-                regs->eflags);
+        printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->ip);
+        printk_address(regs->ip);
+        printk("RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->sp,
+                regs->flags);
         printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
-               regs->rax, regs->rbx, regs->rcx);
+               regs->ax, regs->bx, regs->cx);
         printk("RDX: %016lx RSI: %016lx RDI: %016lx\n",
-               regs->rdx, regs->rsi, regs->rdi); 
+               regs->dx, regs->si, regs->di);
         printk("RBP: %016lx R08: %016lx R09: %016lx\n",
-               regs->rbp, regs->r8, regs->r9); 
+               regs->bp, regs->r8, regs->r9);
         printk("R10: %016lx R11: %016lx R12: %016lx\n",
                regs->r10, regs->r11, regs->r12); 
         printk("R13: %016lx R14: %016lx R15: %016lx\n",
@@ -476,7 +476,7 @@ void prepare_to_copy(struct task_struct *tsk)
         unlazy_fpu(tsk);
 }
 
-int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp, 
+int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
                 unsigned long unused,
         struct task_struct * p, struct pt_regs * regs)
 {
@@ -488,10 +488,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
                         (THREAD_SIZE + task_stack_page(p))) - 1;
         *childregs = *regs;
 
-        childregs->rax = 0;
-        childregs->rsp = rsp;
-        if (rsp == ~0UL)
-                childregs->rsp = (unsigned long)childregs;
+        childregs->ax = 0;
+        childregs->sp = sp;
+        if (sp == ~0UL)
+                childregs->sp = (unsigned long)childregs;
 
         p->thread.rsp = (unsigned long) childregs;
         p->thread.rsp0 = (unsigned long) (childregs+1);
@@ -525,7 +525,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long rsp,
 #ifdef CONFIG_IA32_EMULATION
                 if (test_thread_flag(TIF_IA32))
                         err = do_set_thread_area(p, -1,
-                                (struct user_desc __user *)childregs->rsi, 0);
+                                (struct user_desc __user *)childregs->si, 0);
                 else                    
 #endif   
                         err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8); 
@@ -732,7 +732,7 @@ void set_personality_64bit(void)
 
 asmlinkage long sys_fork(struct pt_regs *regs)
 {
-        return do_fork(SIGCHLD, regs->rsp, regs, 0, NULL, NULL);
+        return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
 }
 
 asmlinkage long
@@ -740,7 +740,7 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
           void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
 {
         if (!newsp)
-                newsp = regs->rsp;
+                newsp = regs->sp;
         return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 }
 
@@ -756,14 +756,14 @@ sys_clone(unsigned long clone_flags, unsigned long newsp,
  */
 asmlinkage long sys_vfork(struct pt_regs *regs)
 {
-        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->rsp, regs, 0,
+        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0,
                     NULL, NULL);
 }
 
 unsigned long get_wchan(struct task_struct *p)
 {
         unsigned long stack;
-        u64 fp,rip;
+        u64 fp,ip;
         int count = 0;
 
         if (!p || p == current || p->state==TASK_RUNNING)
@@ -776,9 +776,9 @@ unsigned long get_wchan(struct task_struct *p)
                 if (fp < (unsigned long)stack ||
                     fp > (unsigned long)stack+THREAD_SIZE)
                         return 0; 
-                rip = *(u64 *)(fp+8); 
-                if (!in_sched_functions(rip))
-                        return rip; 
+                ip = *(u64 *)(fp+8);
+                if (!in_sched_functions(ip))
+                        return ip;
                 fp = *(u64 *)fp; 
         } while (count++ < 16); 
         return 0;
diff --git a/arch/x86/kernel/ptrace_32.c b/arch/x86/kernel/ptrace_32.c
index 512f8412b799..f81e2f1827d4 100644
--- a/arch/x86/kernel/ptrace_32.c
+++ b/arch/x86/kernel/ptrace_32.c
@@ -39,10 +39,10 @@
 
 static long *pt_regs_access(struct pt_regs *regs, unsigned long regno)
 {
-        BUILD_BUG_ON(offsetof(struct pt_regs, ebx) != 0);
+        BUILD_BUG_ON(offsetof(struct pt_regs, bx) != 0);
         if (regno > FS)
                 --regno;
-        return &regs->ebx + regno;
+        return &regs->bx + regno;
 }
 
 static int putreg(struct task_struct *child,
@@ -80,7 +80,7 @@ static int putreg(struct task_struct *child,
                                 clear_tsk_thread_flag(child, TIF_FORCED_TF);
                         else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
                                 value |= X86_EFLAGS_TF;
-                        value |= regs->eflags & ~FLAG_MASK;
+                        value |= regs->flags & ~FLAG_MASK;
                         break;
         }
         *pt_regs_access(regs, regno) = value;
@@ -98,7 +98,7 @@ static unsigned long getreg(struct task_struct *child, unsigned long regno)
                         /*
                          * If the debugger set TF, hide it from the readout.
                          */
-                        retval = regs->eflags;
+                        retval = regs->flags;
                         if (test_tsk_thread_flag(child, TIF_FORCED_TF))
                                 retval &= ~X86_EFLAGS_TF;
                         break;
@@ -369,8 +369,8 @@ void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)
         info.si_signo = SIGTRAP;
         info.si_code = TRAP_BRKPT;
 
-        /* User-mode eip? */
-        info.si_addr = user_mode_vm(regs) ? (void __user *) regs->eip : NULL;
+        /* User-mode ip? */
+        info.si_addr = user_mode_vm(regs) ? (void __user *) regs->ip : NULL;
 
         /* Send us the fake SIGTRAP */
         force_sig_info(SIGTRAP, &info, tsk);
@@ -392,12 +392,12 @@ int do_syscall_trace(struct pt_regs *regs, int entryexit)
 
         /* do the secure computing check first */
         if (!entryexit)
-                secure_computing(regs->orig_eax);
+                secure_computing(regs->orig_ax);
 
         if (unlikely(current->audit_context)) {
                 if (entryexit)
-                        audit_syscall_exit(AUDITSC_RESULT(regs->eax),
-                                                regs->eax);
+                        audit_syscall_exit(AUDITSC_RESULT(regs->ax),
+                                                regs->ax);
                 /* Debug traps, when using PTRACE_SINGLESTEP, must be sent only
                  * on the syscall exit path. Normally, when TIF_SYSCALL_AUDIT is
                  * not used, entry.S will call us only on syscall exit, not
@@ -445,13 +445,13 @@ int do_syscall_trace(struct pt_regs *regs, int entryexit)
         ret = is_sysemu;
 out:
         if (unlikely(current->audit_context) && !entryexit)
-                audit_syscall_entry(AUDIT_ARCH_I386, regs->orig_eax,
-                                    regs->ebx, regs->ecx, regs->edx, regs->esi);
+                audit_syscall_entry(AUDIT_ARCH_I386, regs->orig_ax,
+                                    regs->bx, regs->cx, regs->dx, regs->si);
         if (ret == 0)
                 return 0;
 
-        regs->orig_eax = -1; /* force skip of syscall restarting */
+        regs->orig_ax = -1; /* force skip of syscall restarting */
         if (unlikely(current->audit_context))
-                audit_syscall_exit(AUDITSC_RESULT(regs->eax), regs->eax);
+                audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
         return 1;
 }
diff --git a/arch/x86/kernel/ptrace_64.c b/arch/x86/kernel/ptrace_64.c
index 4ba66d8af717..bee20bb1a6c0 100644
--- a/arch/x86/kernel/ptrace_64.c
+++ b/arch/x86/kernel/ptrace_64.c
@@ -119,7 +119,7 @@ static int putreg(struct task_struct *child,
                                 clear_tsk_thread_flag(child, TIF_FORCED_TF);
                         else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
                                 value |= X86_EFLAGS_TF;
-                        value |= regs->eflags & ~FLAG_MASK;
+                        value |= regs->flags & ~FLAG_MASK;
                         break;
                 case offsetof(struct user_regs_struct,cs): 
                         if ((value & 3) != 3)
@@ -168,7 +168,7 @@ static unsigned long getreg(struct task_struct *child, unsigned long regno)
                         /*
                          * If the debugger set TF, hide it from the readout.
                          */
-                        val = regs->eflags;
+                        val = regs->flags;
                         if (test_tsk_thread_flag(child, TIF_IA32))
                                 val &= 0xffffffff;
                         if (test_tsk_thread_flag(child, TIF_FORCED_TF))
@@ -383,9 +383,9 @@ static void syscall_trace(struct pt_regs *regs)
 {
 
 #if 0
-        printk("trace %s rip %lx rsp %lx rax %d origrax %d caller %lx tiflags %x ptrace %x\n",
+        printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",
                current->comm,
-               regs->rip, regs->rsp, regs->rax, regs->orig_rax, __builtin_return_address(0),
+               regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),
                current_thread_info()->flags, current->ptrace); 
 #endif
 
@@ -405,7 +405,7 @@ static void syscall_trace(struct pt_regs *regs)
 asmlinkage void syscall_trace_enter(struct pt_regs *regs)
 {
         /* do the secure computing check first */
-        secure_computing(regs->orig_rax);
+        secure_computing(regs->orig_ax);
 
         if (test_thread_flag(TIF_SYSCALL_TRACE)
             && (current->ptrace & PT_PTRACED))
@@ -414,14 +414,14 @@ asmlinkage void syscall_trace_enter(struct pt_regs *regs)
         if (unlikely(current->audit_context)) {
                 if (test_thread_flag(TIF_IA32)) {
                         audit_syscall_entry(AUDIT_ARCH_I386,
-                                            regs->orig_rax,
-                                            regs->rbx, regs->rcx,
-                                            regs->rdx, regs->rsi);
+                                            regs->orig_ax,
+                                            regs->bx, regs->cx,
+                                            regs->dx, regs->si);
                 } else {
                         audit_syscall_entry(AUDIT_ARCH_X86_64,
-                                            regs->orig_rax,
-                                            regs->rdi, regs->rsi,
-                                            regs->rdx, regs->r10);
+                                            regs->orig_ax,
+                                            regs->di, regs->si,
+                                            regs->dx, regs->r10);
                 }
         }
 }
@@ -429,7 +429,7 @@ asmlinkage void syscall_trace_enter(struct pt_regs *regs)
 asmlinkage void syscall_trace_leave(struct pt_regs *regs)
 {
         if (unlikely(current->audit_context))
-                audit_syscall_exit(AUDITSC_RESULT(regs->rax), regs->rax);
+                audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
 
         if ((test_thread_flag(TIF_SYSCALL_TRACE)
              || test_thread_flag(TIF_SINGLESTEP))
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index 0a7c812212c9..40fd3515ccf1 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -82,14 +82,14 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
 }
 
 asmlinkage int
-sys_sigaltstack(unsigned long ebx)
+sys_sigaltstack(unsigned long bx)
 {
         /* This is needed to make gcc realize it doesn't own the "struct pt_regs" */
-        struct pt_regs *regs = (struct pt_regs *)&ebx;
-        const stack_t __user *uss = (const stack_t __user *)ebx;
-        stack_t __user *uoss = (stack_t __user *)regs->ecx;
+        struct pt_regs *regs = (struct pt_regs *)&bx;
+        const stack_t __user *uss = (const stack_t __user *)bx;
+        stack_t __user *uoss = (stack_t __user *)regs->cx;
 
-        return do_sigaltstack(uss, uoss, regs->esp);
+        return do_sigaltstack(uss, uoss, regs->sp);
 }
 
 
@@ -105,17 +105,17 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *peax
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
 
-#define COPY(x)         err |= __get_user(regs->x, &sc->x)
+#define COPY(x)         err |= __get_user(regs->x, &sc->e ## x)
 
 #define COPY_SEG(seg)                                                   \
         { unsigned short tmp;                                           \
           err |= __get_user(tmp, &sc->seg);                             \
-          regs->x##seg = tmp; }
+          regs->seg = tmp; }
 
 #define COPY_SEG_STRICT(seg)                                            \
         { unsigned short tmp;                                           \
           err |= __get_user(tmp, &sc->seg);                             \
-          regs->x##seg = tmp|3; }
+          regs->seg = tmp|3; }
 
 #define GET_SEG(seg)                                                    \
         { unsigned short tmp;                                           \
@@ -131,22 +131,22 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *peax
         COPY_SEG(fs);
         COPY_SEG(es);
         COPY_SEG(ds);
-        COPY(edi);
-        COPY(esi);
-        COPY(ebp);
-        COPY(esp);
-        COPY(ebx);
-        COPY(edx);
-        COPY(ecx);
-        COPY(eip);
+        COPY(di);
+        COPY(si);
+        COPY(bp);
+        COPY(sp);
+        COPY(bx);
+        COPY(dx);
+        COPY(cx);
+        COPY(ip);
         COPY_SEG_STRICT(cs);
         COPY_SEG_STRICT(ss);
         
         {
                 unsigned int tmpflags;
                 err |= __get_user(tmpflags, &sc->eflags);
-                regs->eflags = (regs->eflags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
-                regs->orig_eax = -1;            /* disable syscall checks */
+                regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
+                regs->orig_ax = -1;             /* disable syscall checks */
         }
 
         {
@@ -175,9 +175,9 @@ badframe:
 asmlinkage int sys_sigreturn(unsigned long __unused)
 {
         struct pt_regs *regs = (struct pt_regs *) &__unused;
-        struct sigframe __user *frame = (struct sigframe __user *)(regs->esp - 8);
+        struct sigframe __user *frame = (struct sigframe __user *)(regs->sp - 8);
         sigset_t set;
-        int eax;
+        int ax;
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -193,17 +193,17 @@ asmlinkage int sys_sigreturn(unsigned long __unused)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
         
-        if (restore_sigcontext(regs, &frame->sc, &eax))
+        if (restore_sigcontext(regs, &frame->sc, &ax))
                 goto badframe;
-        return eax;
+        return ax;
 
 badframe:
         if (show_unhandled_signals && printk_ratelimit())
-                printk("%s%s[%d] bad frame in sigreturn frame:%p eip:%lx"
-                       " esp:%lx oeax:%lx\n",
+                printk("%s%s[%d] bad frame in sigreturn frame:%p ip:%lx"
+                       " sp:%lx oeax:%lx\n",
                     task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
-                    current->comm, task_pid_nr(current), frame, regs->eip,
-                    regs->esp, regs->orig_eax);
+                    current->comm, task_pid_nr(current), frame, regs->ip,
+                    regs->sp, regs->orig_ax);
 
         force_sig(SIGSEGV, current);
         return 0;
@@ -212,9 +212,9 @@ badframe:
 asmlinkage int sys_rt_sigreturn(unsigned long __unused)
 {
         struct pt_regs *regs = (struct pt_regs *) &__unused;
-        struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->esp - 4);
+        struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->sp - 4);
         sigset_t set;
-        int eax;
+        int ax;
 
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
@@ -227,13 +227,13 @@ asmlinkage int sys_rt_sigreturn(unsigned long __unused)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
         
-        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
+        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
                 goto badframe;
 
-        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->esp) == -EFAULT)
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
                 goto badframe;
 
-        return eax;
+        return ax;
 
 badframe:
         force_sig(SIGSEGV, current);
@@ -250,27 +250,27 @@ setup_sigcontext(struct sigcontext __user *sc, struct _fpstate __user *fpstate,
 {
         int tmp, err = 0;
 
-        err |= __put_user(regs->xfs, (unsigned int __user *)&sc->fs);
+        err |= __put_user(regs->fs, (unsigned int __user *)&sc->fs);
         savesegment(gs, tmp);
         err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
 
-        err |= __put_user(regs->xes, (unsigned int __user *)&sc->es);
-        err |= __put_user(regs->xds, (unsigned int __user *)&sc->ds);
-        err |= __put_user(regs->edi, &sc->edi);
-        err |= __put_user(regs->esi, &sc->esi);
-        err |= __put_user(regs->ebp, &sc->ebp);
-        err |= __put_user(regs->esp, &sc->esp);
-        err |= __put_user(regs->ebx, &sc->ebx);
-        err |= __put_user(regs->edx, &sc->edx);
-        err |= __put_user(regs->ecx, &sc->ecx);
-        err |= __put_user(regs->eax, &sc->eax);
+        err |= __put_user(regs->es, (unsigned int __user *)&sc->es);
+        err |= __put_user(regs->ds, (unsigned int __user *)&sc->ds);
+        err |= __put_user(regs->di, &sc->edi);
+        err |= __put_user(regs->si, &sc->esi);
+        err |= __put_user(regs->bp, &sc->ebp);
+        err |= __put_user(regs->sp, &sc->esp);
+        err |= __put_user(regs->bx, &sc->ebx);
+        err |= __put_user(regs->dx, &sc->edx);
+        err |= __put_user(regs->cx, &sc->ecx);
+        err |= __put_user(regs->ax, &sc->eax);
         err |= __put_user(current->thread.trap_no, &sc->trapno);
         err |= __put_user(current->thread.error_code, &sc->err);
-        err |= __put_user(regs->eip, &sc->eip);
-        err |= __put_user(regs->xcs, (unsigned int __user *)&sc->cs);
-        err |= __put_user(regs->eflags, &sc->eflags);
-        err |= __put_user(regs->esp, &sc->esp_at_signal);
-        err |= __put_user(regs->xss, (unsigned int __user *)&sc->ss);
+        err |= __put_user(regs->ip, &sc->eip);
+        err |= __put_user(regs->cs, (unsigned int __user *)&sc->cs);
+        err |= __put_user(regs->flags, &sc->eflags);
+        err |= __put_user(regs->sp, &sc->esp_at_signal);
+        err |= __put_user(regs->ss, (unsigned int __user *)&sc->ss);
 
         tmp = save_i387(fpstate);
         if (tmp < 0)
@@ -291,36 +291,36 @@ setup_sigcontext(struct sigcontext __user *sc, struct _fpstate __user *fpstate,
 static inline void __user *
 get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
 {
-        unsigned long esp;
+        unsigned long sp;
 
         /* Default to using normal stack */
-        esp = regs->esp;
+        sp = regs->sp;
 
         /*
          * If we are on the alternate signal stack and would overflow it, don't.
          * Return an always-bogus address instead so we will die with SIGSEGV.
          */
-        if (on_sig_stack(esp) && !likely(on_sig_stack(esp - frame_size)))
+        if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size)))
                 return (void __user *) -1L;
 
         /* This is the X/Open sanctioned signal stack switching.  */
         if (ka->sa.sa_flags & SA_ONSTACK) {
-                if (sas_ss_flags(esp) == 0)
-                        esp = current->sas_ss_sp + current->sas_ss_size;
+                if (sas_ss_flags(sp) == 0)
+                        sp = current->sas_ss_sp + current->sas_ss_size;
         }
 
         /* This is the legacy signal stack switching. */
-        else if ((regs->xss & 0xffff) != __USER_DS &&
+        else if ((regs->ss & 0xffff) != __USER_DS &&
                  !(ka->sa.sa_flags & SA_RESTORER) &&
                  ka->sa.sa_restorer) {
-                esp = (unsigned long) ka->sa.sa_restorer;
+                sp = (unsigned long) ka->sa.sa_restorer;
         }
 
-        esp -= frame_size;
+        sp -= frame_size;
         /* Align the stack pointer according to the i386 ABI,
          * i.e. so that on function entry ((sp + 4) & 15) == 0. */
-        esp = ((esp + 4) & -16ul) - 4;
-        return (void __user *) esp;
+        sp = ((sp + 4) & -16ul) - 4;
+        return (void __user *) sp;
 }
 
 /* These symbols are defined with the addresses in the vsyscall page.
@@ -387,16 +387,16 @@ static int setup_frame(int sig, struct k_sigaction *ka,
                 goto give_sigsegv;
 
         /* Set up registers for signal handler */
-        regs->esp = (unsigned long) frame;
-        regs->eip = (unsigned long) ka->sa.sa_handler;
-        regs->eax = (unsigned long) sig;
-        regs->edx = (unsigned long) 0;
-        regs->ecx = (unsigned long) 0;
+        regs->sp = (unsigned long) frame;
+        regs->ip = (unsigned long) ka->sa.sa_handler;
+        regs->ax = (unsigned long) sig;
+        regs->dx = (unsigned long) 0;
+        regs->cx = (unsigned long) 0;
 
-        regs->xds = __USER_DS;
-        regs->xes = __USER_DS;
-        regs->xss = __USER_DS;
-        regs->xcs = __USER_CS;
+        regs->ds = __USER_DS;
+        regs->es = __USER_DS;
+        regs->ss = __USER_DS;
+        regs->cs = __USER_CS;
 
         /*
          * Clear TF when entering the signal handler, but
@@ -404,13 +404,13 @@ static int setup_frame(int sig, struct k_sigaction *ka,
          * The tracer may want to single-step inside the
          * handler too.
          */
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
         printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
-                current->comm, current->pid, frame, regs->eip, frame->pretcode);
+                current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
         return 0;
@@ -450,7 +450,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(0, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
         err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(regs->esp),
+        err |= __put_user(sas_ss_flags(regs->sp),
                           &frame->uc.uc_stack.ss_flags);
         err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
         err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->fpstate,
@@ -466,7 +466,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(restorer, &frame->pretcode);
          
         /*
-         * This is movl $,%eax ; int $0x80
+         * This is movl $,%ax ; int $0x80
          *
          * WE DO NOT USE IT ANY MORE! It's only left here for historical
          * reasons and because gdb uses it as a signature to notice
@@ -480,16 +480,16 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 goto give_sigsegv;
 
         /* Set up registers for signal handler */
-        regs->esp = (unsigned long) frame;
-        regs->eip = (unsigned long) ka->sa.sa_handler;
-        regs->eax = (unsigned long) usig;
-        regs->edx = (unsigned long) &frame->info;
-        regs->ecx = (unsigned long) &frame->uc;
+        regs->sp = (unsigned long) frame;
+        regs->ip = (unsigned long) ka->sa.sa_handler;
+        regs->ax = (unsigned long) usig;
+        regs->dx = (unsigned long) &frame->info;
+        regs->cx = (unsigned long) &frame->uc;
 
-        regs->xds = __USER_DS;
-        regs->xes = __USER_DS;
-        regs->xss = __USER_DS;
-        regs->xcs = __USER_CS;
+        regs->ds = __USER_DS;
+        regs->es = __USER_DS;
+        regs->ss = __USER_DS;
+        regs->cs = __USER_CS;
 
         /*
          * Clear TF when entering the signal handler, but
@@ -497,13 +497,13 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
          * The tracer may want to single-step inside the
          * handler too.
          */
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
 
 #if DEBUG_SIG
         printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
-                current->comm, current->pid, frame, regs->eip, frame->pretcode);
+                current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
         return 0;
@@ -524,23 +524,23 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
         int ret;
 
         /* Are we from a system call? */
-        if (regs->orig_eax >= 0) {
+        if (regs->orig_ax >= 0) {
                 /* If so, check system call restarting.. */
-                switch (regs->eax) {
+                switch (regs->ax) {
                         case -ERESTART_RESTARTBLOCK:
                         case -ERESTARTNOHAND:
-                                regs->eax = -EINTR;
+                                regs->ax = -EINTR;
                                 break;
 
                         case -ERESTARTSYS:
                                 if (!(ka->sa.sa_flags & SA_RESTART)) {
-                                        regs->eax = -EINTR;
+                                        regs->ax = -EINTR;
                                         break;
                                 }
                         /* fallthrough */
                         case -ERESTARTNOINTR:
-                                regs->eax = regs->orig_eax;
-                                regs->eip -= 2;
+                                regs->ax = regs->orig_ax;
+                                regs->ip -= 2;
                 }
         }
 
@@ -548,9 +548,9 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
          * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
          * flag so that register information in the sigcontext is correct.
          */
-        if (unlikely(regs->eflags & X86_EFLAGS_TF) &&
+        if (unlikely(regs->flags & X86_EFLAGS_TF) &&
             likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
-                regs->eflags &= ~X86_EFLAGS_TF;
+                regs->flags &= ~X86_EFLAGS_TF;
 
         /* Set up the stack frame */
         if (ka->sa.sa_flags & SA_SIGINFO)
@@ -622,19 +622,19 @@ static void fastcall do_signal(struct pt_regs *regs)
         }
 
         /* Did we come from a system call? */
-        if (regs->orig_eax >= 0) {
+        if (regs->orig_ax >= 0) {
                 /* Restart the system call - no handlers present */
-                switch (regs->eax) {
+                switch (regs->ax) {
                 case -ERESTARTNOHAND:
                 case -ERESTARTSYS:
                 case -ERESTARTNOINTR:
-                        regs->eax = regs->orig_eax;
-                        regs->eip -= 2;
+                        regs->ax = regs->orig_ax;
+                        regs->ip -= 2;
                         break;
 
                 case -ERESTART_RESTARTBLOCK:
-                        regs->eax = __NR_restart_syscall;
-                        regs->eip -= 2;
+                        regs->ax = __NR_restart_syscall;
+                        regs->ip -= 2;
                         break;
                 }
         }
@@ -657,7 +657,7 @@ void do_notify_resume(struct pt_regs *regs, void *_unused,
 {
         /* Pending single-step? */
         if (thread_info_flags & _TIF_SINGLESTEP) {
-                regs->eflags |= TF_MASK;
+                regs->flags |= TF_MASK;
                 clear_thread_flag(TIF_SINGLESTEP);
         }
 
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index ab0178ebe00a..4b228fd83b31 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -39,7 +39,7 @@ asmlinkage long
 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
                 struct pt_regs *regs)
 {
-        return do_sigaltstack(uss, uoss, regs->rsp);
+        return do_sigaltstack(uss, uoss, regs->sp);
 }
 
 
@@ -62,10 +62,11 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, unsigned
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
 
+#define COPYR(x)        err |= __get_user(regs->x, &sc->r ## x)
 #define COPY(x)         err |= __get_user(regs->x, &sc->x)
 
-        COPY(rdi); COPY(rsi); COPY(rbp); COPY(rsp); COPY(rbx);
-        COPY(rdx); COPY(rcx); COPY(rip);
+        COPYR(di); COPYR(si); COPYR(bp); COPYR(sp); COPYR(bx);
+        COPYR(dx); COPYR(cx); COPYR(ip);
         COPY(r8);
         COPY(r9);
         COPY(r10);
@@ -87,8 +88,8 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, unsigned
         {
                 unsigned int tmpflags;
                 err |= __get_user(tmpflags, &sc->eflags);
-                regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
-                regs->orig_rax = -1;            /* disable syscall checks */
+                regs->flags = (regs->flags & ~0x40DD5) | (tmpflags & 0x40DD5);
+                regs->orig_ax = -1;             /* disable syscall checks */
         }
 
         {
@@ -119,9 +120,9 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 {
         struct rt_sigframe __user *frame;
         sigset_t set;
-        unsigned long eax;
+        unsigned long ax;
 
-        frame = (struct rt_sigframe __user *)(regs->rsp - 8);
+        frame = (struct rt_sigframe __user *)(regs->sp - 8);
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) {
                 goto badframe;
         } 
@@ -135,17 +136,17 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
         
-        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
+        if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
                 goto badframe;
 
 #ifdef DEBUG_SIG
-        printk("%d sigreturn rip:%lx rsp:%lx frame:%p rax:%lx\n",current->pid,regs->rip,regs->rsp,frame,eax);
+        printk("%d sigreturn ip:%lx sp:%lx frame:%p ax:%lx\n",current->pid,regs->ip,regs->sp,frame,ax);
 #endif
 
-        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->rsp) == -EFAULT)
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
                 goto badframe;
 
-        return eax;
+        return ax;
 
 badframe:
         signal_fault(regs,frame,"sigreturn");
@@ -165,14 +166,14 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned lo
         err |= __put_user(0, &sc->gs);
         err |= __put_user(0, &sc->fs);
 
-        err |= __put_user(regs->rdi, &sc->rdi);
-        err |= __put_user(regs->rsi, &sc->rsi);
-        err |= __put_user(regs->rbp, &sc->rbp);
-        err |= __put_user(regs->rsp, &sc->rsp);
-        err |= __put_user(regs->rbx, &sc->rbx);
-        err |= __put_user(regs->rdx, &sc->rdx);
-        err |= __put_user(regs->rcx, &sc->rcx);
-        err |= __put_user(regs->rax, &sc->rax);
+        err |= __put_user(regs->di, &sc->rdi);
+        err |= __put_user(regs->si, &sc->rsi);
+        err |= __put_user(regs->bp, &sc->rbp);
+        err |= __put_user(regs->sp, &sc->rsp);
+        err |= __put_user(regs->bx, &sc->rbx);
+        err |= __put_user(regs->dx, &sc->rdx);
+        err |= __put_user(regs->cx, &sc->rcx);
+        err |= __put_user(regs->ax, &sc->rax);
         err |= __put_user(regs->r8, &sc->r8);
         err |= __put_user(regs->r9, &sc->r9);
         err |= __put_user(regs->r10, &sc->r10);
@@ -183,8 +184,8 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned lo
         err |= __put_user(regs->r15, &sc->r15);
         err |= __put_user(me->thread.trap_no, &sc->trapno);
         err |= __put_user(me->thread.error_code, &sc->err);
-        err |= __put_user(regs->rip, &sc->rip);
-        err |= __put_user(regs->eflags, &sc->eflags);
+        err |= __put_user(regs->ip, &sc->rip);
+        err |= __put_user(regs->flags, &sc->eflags);
         err |= __put_user(mask, &sc->oldmask);
         err |= __put_user(me->thread.cr2, &sc->cr2);
 
@@ -198,18 +199,18 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, unsigned lo
 static void __user *
 get_stack(struct k_sigaction *ka, struct pt_regs *regs, unsigned long size)
 {
-        unsigned long rsp;
+        unsigned long sp;
 
         /* Default to using normal stack - redzone*/
-        rsp = regs->rsp - 128;
+        sp = regs->sp - 128;
 
         /* This is the X/Open sanctioned signal stack switching.  */
         if (ka->sa.sa_flags & SA_ONSTACK) {
-                if (sas_ss_flags(rsp) == 0)
-                        rsp = current->sas_ss_sp + current->sas_ss_size;
+                if (sas_ss_flags(sp) == 0)
+                        sp = current->sas_ss_sp + current->sas_ss_size;
         }
 
-        return (void __user *)round_down(rsp - size, 16); 
+        return (void __user *)round_down(sp - size, 16);
 }
 
 static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
@@ -246,7 +247,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= __put_user(0, &frame->uc.uc_flags);
         err |= __put_user(0, &frame->uc.uc_link);
         err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
-        err |= __put_user(sas_ss_flags(regs->rsp),
+        err |= __put_user(sas_ss_flags(regs->sp),
                           &frame->uc.uc_stack.ss_flags);
         err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
         err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0], me);
@@ -271,21 +272,21 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 goto give_sigsegv;
 
 #ifdef DEBUG_SIG
-        printk("%d old rip %lx old rsp %lx old rax %lx\n", current->pid,regs->rip,regs->rsp,regs->rax);
+        printk("%d old ip %lx old sp %lx old ax %lx\n", current->pid,regs->ip,regs->sp,regs->ax);
 #endif
 
         /* Set up registers for signal handler */
-        regs->rdi = sig;
+        regs->di = sig;
         /* In case the signal handler was declared without prototypes */ 
-        regs->rax = 0;  
+        regs->ax = 0;
 
         /* This also works for non SA_SIGINFO handlers because they expect the
            next argument after the signal number on the stack. */
-        regs->rsi = (unsigned long)&frame->info; 
-        regs->rdx = (unsigned long)&frame->uc; 
-        regs->rip = (unsigned long) ka->sa.sa_handler;
+        regs->si = (unsigned long)&frame->info;
+        regs->dx = (unsigned long)&frame->uc;
+        regs->ip = (unsigned long) ka->sa.sa_handler;
 
-        regs->rsp = (unsigned long)frame;
+        regs->sp = (unsigned long)frame;
 
         /* Set up the CS register to run signal handlers in 64-bit mode,
            even if the handler happens to be interrupting 32-bit code. */
@@ -295,12 +296,12 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
            see include/asm-x86_64/uaccess.h for details. */
         set_fs(USER_DS);
 
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
 #ifdef DEBUG_SIG
         printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%p\n",
-                current->comm, current->pid, frame, regs->rip, frame->pretcode);
+                current->comm, current->pid, frame, regs->ip, frame->pretcode);
 #endif
 
         return 0;
@@ -321,29 +322,29 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
         int ret;
 
 #ifdef DEBUG_SIG
-        printk("handle_signal pid:%d sig:%lu rip:%lx rsp:%lx regs=%p\n",
+        printk("handle_signal pid:%d sig:%lu ip:%lx sp:%lx regs=%p\n",
                 current->pid, sig,
-                regs->rip, regs->rsp, regs);
+                regs->ip, regs->sp, regs);
 #endif
 
         /* Are we from a system call? */
-        if ((long)regs->orig_rax >= 0) {
+        if ((long)regs->orig_ax >= 0) {
                 /* If so, check system call restarting.. */
-                switch (regs->rax) {
+                switch (regs->ax) {
                         case -ERESTART_RESTARTBLOCK:
                         case -ERESTARTNOHAND:
-                                regs->rax = -EINTR;
+                                regs->ax = -EINTR;
                                 break;
 
                         case -ERESTARTSYS:
                                 if (!(ka->sa.sa_flags & SA_RESTART)) {
-                                        regs->rax = -EINTR;
+                                        regs->ax = -EINTR;
                                         break;
                                 }
                                 /* fallthrough */
                         case -ERESTARTNOINTR:
-                                regs->rax = regs->orig_rax;
-                                regs->rip -= 2;
+                                regs->ax = regs->orig_ax;
+                                regs->ip -= 2;
                                 break;
                 }
         }
@@ -352,9 +353,9 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
          * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
          * flag so that register information in the sigcontext is correct.
          */
-        if (unlikely(regs->eflags & X86_EFLAGS_TF) &&
+        if (unlikely(regs->flags & X86_EFLAGS_TF) &&
             likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
-                regs->eflags &= ~X86_EFLAGS_TF;
+                regs->flags &= ~X86_EFLAGS_TF;
 
 #ifdef CONFIG_IA32_EMULATION
         if (test_thread_flag(TIF_IA32)) {
@@ -426,21 +427,21 @@ static void do_signal(struct pt_regs *regs)
         }
 
         /* Did we come from a system call? */
-        if ((long)regs->orig_rax >= 0) {
+        if ((long)regs->orig_ax >= 0) {
                 /* Restart the system call - no handlers present */
-                long res = regs->rax;
+                long res = regs->ax;
                 switch (res) {
                 case -ERESTARTNOHAND:
                 case -ERESTARTSYS:
                 case -ERESTARTNOINTR:
-                        regs->rax = regs->orig_rax;
-                        regs->rip -= 2;
+                        regs->ax = regs->orig_ax;
+                        regs->ip -= 2;
                         break;
                 case -ERESTART_RESTARTBLOCK:
-                        regs->rax = test_thread_flag(TIF_IA32) ?
+                        regs->ax = test_thread_flag(TIF_IA32) ?
                                         __NR_ia32_restart_syscall :
                                         __NR_restart_syscall;
-                        regs->rip -= 2;
+                        regs->ip -= 2;
                         break;
                 }
         }
@@ -457,13 +458,13 @@ void
 do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
 {
 #ifdef DEBUG_SIG
-        printk("do_notify_resume flags:%x rip:%lx rsp:%lx caller:%p pending:%x\n",
-               thread_info_flags, regs->rip, regs->rsp, __builtin_return_address(0),signal_pending(current)); 
+        printk("do_notify_resume flags:%x ip:%lx sp:%lx caller:%p pending:%x\n",
+               thread_info_flags, regs->ip, regs->sp, __builtin_return_address(0),signal_pending(current));
 #endif
                
         /* Pending single-step? */
         if (thread_info_flags & _TIF_SINGLESTEP) {
-                regs->eflags |= TF_MASK;
+                regs->flags |= TF_MASK;
                 clear_thread_flag(TIF_SINGLESTEP);
         }
 
@@ -485,8 +486,8 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
 { 
         struct task_struct *me = current; 
         if (show_unhandled_signals && printk_ratelimit())
-                printk("%s[%d] bad frame in %s frame:%p rip:%lx rsp:%lx orax:%lx\n",
-               me->comm,me->pid,where,frame,regs->rip,regs->rsp,regs->orig_rax); 
+                printk("%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx\n",
+               me->comm,me->pid,where,frame,regs->ip,regs->sp,regs->orig_ax);
 
         force_sig(SIGSEGV, me); 
 } 
diff --git a/arch/x86/kernel/smp_64.c b/arch/x86/kernel/smp_64.c
index 7142447b5666..02a6533e8909 100644
--- a/arch/x86/kernel/smp_64.c
+++ b/arch/x86/kernel/smp_64.c
@@ -136,7 +136,7 @@ asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
          * orig_rax contains the negated interrupt vector.
          * Use that to determine where the sender put the data.
          */
-        sender = ~regs->orig_rax - INVALIDATE_TLB_VECTOR_START;
+        sender = ~regs->orig_ax - INVALIDATE_TLB_VECTOR_START;
         f = &per_cpu(flush_state, sender);
 
         if (!cpu_isset(cpu, f->flush_cpumask))
diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c
index 0bf7f20baba0..3566191832b3 100644
--- a/arch/x86/kernel/smpboot_32.c
+++ b/arch/x86/kernel/smpboot_32.c
@@ -447,7 +447,7 @@ void __devinit initialize_secondary(void)
 {
         /*
          * We don't actually need to load the full TSS,
-         * basically just the stack pointer and the eip.
+         * basically just the stack pointer and the ip.
          */
 
         asm volatile(
@@ -459,7 +459,7 @@ void __devinit initialize_secondary(void)
 
 /* Static state in head.S used to set up a CPU */
 extern struct {
-        void * esp;
+        void * sp;
         unsigned short ss;
 } stack_start;
 
@@ -667,7 +667,7 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip)
          * target processor state.
          */
         startup_ipi_hook(phys_apicid, (unsigned long) start_secondary,
-                         (unsigned long) stack_start.esp);
+                         (unsigned long) stack_start.sp);
 
         /*
          * Run STARTUP IPI loop.
@@ -806,9 +806,9 @@ static int __cpuinit do_boot_cpu(int apicid, int cpu)
         alternatives_smp_switch(1);
 
         /* So we see what's up   */
-        printk("Booting processor %d/%d eip %lx\n", cpu, apicid, start_eip);
+        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.esp = (void *) idle->thread.esp;
+        stack_start.sp = (void *) idle->thread.esp;
 
         irq_ctx_init(cpu);
 
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index cf4b9dac4a05..f55c003f5b63 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -12,17 +12,12 @@ unsigned long convert_rip_to_linear(struct task_struct *child, struct pt_regs *r
 {
         unsigned long addr, seg;
 
-#ifdef CONFIG_X86_64
-        addr = regs->rip;
+        addr = regs->ip;
         seg = regs->cs & 0xffff;
-#else
-        addr = regs->eip;
-        seg = regs->xcs & 0xffff;
-        if (regs->eflags & X86_EFLAGS_VM) {
+        if (v8086_mode(regs)) {
                 addr = (addr & 0xffff) + (seg << 4);
                 return addr;
         }
-#endif
 
         /*
          * We'll assume that the code segments in the GDT
@@ -124,11 +119,11 @@ static int enable_single_step(struct task_struct *child)
         /*
          * If TF was already set, don't do anything else
          */
-        if (regs->eflags & X86_EFLAGS_TF)
+        if (regs->flags & X86_EFLAGS_TF)
                 return 0;
 
         /* Set TF on the kernel stack.. */
-        regs->eflags |= X86_EFLAGS_TF;
+        regs->flags |= X86_EFLAGS_TF;
 
         /*
          * ..but if TF is changed by the instruction we will trace,
@@ -203,5 +198,5 @@ void user_disable_single_step(struct task_struct *child)
 
         /* But touch TF only if it was set by us.. */
         if (test_and_clear_tsk_thread_flag(child, TIF_FORCED_TF))
-                task_pt_regs(child)->eflags &= ~X86_EFLAGS_TF;
+                task_pt_regs(child)->flags &= ~X86_EFLAGS_TF;
 }
diff --git a/arch/x86/kernel/suspend_asm_64.S b/arch/x86/kernel/suspend_asm_64.S
index 72f952103e50..aeb9a4d7681e 100644
--- a/arch/x86/kernel/suspend_asm_64.S
+++ b/arch/x86/kernel/suspend_asm_64.S
@@ -18,13 +18,13 @@
 
 ENTRY(swsusp_arch_suspend)
         movq    $saved_context, %rax
-        movq    %rsp, pt_regs_rsp(%rax)
-        movq    %rbp, pt_regs_rbp(%rax)
-        movq    %rsi, pt_regs_rsi(%rax)
-        movq    %rdi, pt_regs_rdi(%rax)
-        movq    %rbx, pt_regs_rbx(%rax)
-        movq    %rcx, pt_regs_rcx(%rax)
-        movq    %rdx, pt_regs_rdx(%rax)
+        movq    %rsp, pt_regs_sp(%rax)
+        movq    %rbp, pt_regs_bp(%rax)
+        movq    %rsi, pt_regs_si(%rax)
+        movq    %rdi, pt_regs_di(%rax)
+        movq    %rbx, pt_regs_bx(%rax)
+        movq    %rcx, pt_regs_cx(%rax)
+        movq    %rdx, pt_regs_dx(%rax)
         movq    %r8, pt_regs_r8(%rax)
         movq    %r9, pt_regs_r9(%rax)
         movq    %r10, pt_regs_r10(%rax)
@@ -34,7 +34,7 @@ ENTRY(swsusp_arch_suspend)
         movq    %r14, pt_regs_r14(%rax)
         movq    %r15, pt_regs_r15(%rax)
         pushfq
-        popq    pt_regs_eflags(%rax)
+        popq    pt_regs_flags(%rax)
 
         /* save the address of restore_registers */
         movq    $restore_registers, %rax
@@ -115,13 +115,13 @@ ENTRY(restore_registers)
 
         /* We don't restore %rax, it must be 0 anyway */
         movq    $saved_context, %rax
-        movq    pt_regs_rsp(%rax), %rsp
-        movq    pt_regs_rbp(%rax), %rbp
-        movq    pt_regs_rsi(%rax), %rsi
-        movq    pt_regs_rdi(%rax), %rdi
-        movq    pt_regs_rbx(%rax), %rbx
-        movq    pt_regs_rcx(%rax), %rcx
-        movq    pt_regs_rdx(%rax), %rdx
+        movq    pt_regs_sp(%rax), %rsp
+        movq    pt_regs_bp(%rax), %rbp
+        movq    pt_regs_si(%rax), %rsi
+        movq    pt_regs_di(%rax), %rdi
+        movq    pt_regs_bx(%rax), %rbx
+        movq    pt_regs_cx(%rax), %rcx
+        movq    pt_regs_dx(%rax), %rdx
         movq    pt_regs_r8(%rax), %r8
         movq    pt_regs_r9(%rax), %r9
         movq    pt_regs_r10(%rax), %r10
@@ -130,7 +130,7 @@ ENTRY(restore_registers)
         movq    pt_regs_r13(%rax), %r13
         movq    pt_regs_r14(%rax), %r14
         movq    pt_regs_r15(%rax), %r15
-        pushq   pt_regs_eflags(%rax)
+        pushq   pt_regs_flags(%rax)
         popfq
 
         xorq    %rax, %rax
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c
index 2dcbb81b4cd3..1a89e93f3f1c 100644
--- a/arch/x86/kernel/time_32.c
+++ b/arch/x86/kernel/time_32.c
@@ -49,15 +49,15 @@ unsigned long profile_pc(struct pt_regs *regs)
         unsigned long pc = instruction_pointer(regs);
 
 #ifdef CONFIG_SMP
-        if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->xcs) &&
+        if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->cs) &&
             in_lock_functions(pc)) {
 #ifdef CONFIG_FRAME_POINTER
-                return *(unsigned long *)(regs->ebp + 4);
+                return *(unsigned long *)(regs->bp + 4);
 #else
-                unsigned long *sp = (unsigned long *)&regs->esp;
+                unsigned long *sp = (unsigned long *)&regs->sp;
 
                 /* Return address is either directly at stack pointer
-                   or above a saved eflags. Eflags has bits 22-31 zero,
+                   or above a saved flags. Eflags has bits 22-31 zero,
                    kernel addresses don't. */
                 if (sp[0] >> 22)
                         return sp[0];
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index f88bf6b802e3..bf0bcc9bb001 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -29,10 +29,10 @@ unsigned long profile_pc(struct pt_regs *regs)
         unsigned long pc = instruction_pointer(regs);
 
         /* Assume the lock function has either no stack frame or a copy
-           of eflags from PUSHF
+           of flags from PUSHF
            Eflags always has bits 22 and up cleared unlike kernel addresses. */
         if (!user_mode(regs) && in_lock_functions(pc)) {
-                unsigned long *sp = (unsigned long *)regs->rsp;
+                unsigned long *sp = (unsigned long *)regs->sp;
                 if (sp[0] >> 22)
                         return sp[0];
                 if (sp[1] >> 22)
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 9b0bbd508cd5..931ef10960ee 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -114,11 +114,11 @@ struct stack_frame {
 };
 
 static inline unsigned long print_context_stack(struct thread_info *tinfo,
-                                unsigned long *stack, unsigned long ebp,
+                                unsigned long *stack, unsigned long bp,
                                 const struct stacktrace_ops *ops, void *data)
 {
 #ifdef  CONFIG_FRAME_POINTER
-        struct stack_frame *frame = (struct stack_frame *)ebp;
+        struct stack_frame *frame = (struct stack_frame *)bp;
         while (valid_stack_ptr(tinfo, frame, sizeof(*frame))) {
                 struct stack_frame *next;
                 unsigned long addr;
@@ -145,7 +145,7 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo,
                         ops->address(data, addr);
         }
 #endif
-        return ebp;
+        return bp;
 }
 
 #define MSG(msg) ops->warning(data, msg)
@@ -154,7 +154,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
                 unsigned long *stack,
                 const struct stacktrace_ops *ops, void *data)
 {
-        unsigned long ebp = 0;
+        unsigned long bp = 0;
 
         if (!task)
                 task = current;
@@ -167,13 +167,13 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
         }
 
 #ifdef CONFIG_FRAME_POINTER
-        if (!ebp) {
+        if (!bp) {
                 if (task == current) {
-                        /* Grab ebp right from our regs */
-                        asm ("movl %%ebp, %0" : "=r" (ebp) : );
+                        /* Grab bp right from our regs */
+                        asm ("movl %%ebp, %0" : "=r" (bp) : );
                 } else {
-                        /* ebp is the last reg pushed by switch_to */
-                        ebp = *(unsigned long *) task->thread.esp;
+                        /* bp is the last reg pushed by switch_to */
+                        bp = *(unsigned long *) task->thread.esp;
                 }
         }
 #endif
@@ -182,7 +182,7 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs,
                 struct thread_info *context;
                 context = (struct thread_info *)
                         ((unsigned long)stack & (~(THREAD_SIZE - 1)));
-                ebp = print_context_stack(context, stack, ebp, ops, data);
+                bp = print_context_stack(context, stack, bp, ops, data);
                 /* Should be after the line below, but somewhere
                    in early boot context comes out corrupted and we
                    can't reference it -AK */
@@ -246,19 +246,19 @@ void show_trace(struct task_struct *task, struct pt_regs *regs,
 }
 
 static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                               unsigned long *esp, char *log_lvl)
+                               unsigned long *sp, char *log_lvl)
 {
         unsigned long *stack;
         int i;
 
-        if (esp == NULL) {
+        if (sp == NULL) {
                 if (task)
-                        esp = (unsigned long*)task->thread.esp;
+                        sp = (unsigned long*)task->thread.esp;
                 else
-                        esp = (unsigned long *)&esp;
+                        sp = (unsigned long *)&sp;
         }
 
-        stack = esp;
+        stack = sp;
         for(i = 0; i < kstack_depth_to_print; i++) {
                 if (kstack_end(stack))
                         break;
@@ -267,13 +267,13 @@ static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
                 printk("%08lx ", *stack++);
         }
         printk("\n%sCall Trace:\n", log_lvl);
-        show_trace_log_lvl(task, regs, esp, log_lvl);
+        show_trace_log_lvl(task, regs, sp, log_lvl);
 }
 
-void show_stack(struct task_struct *task, unsigned long *esp)
+void show_stack(struct task_struct *task, unsigned long *sp)
 {
         printk("       ");
-        show_stack_log_lvl(task, NULL, esp, "");
+        show_stack_log_lvl(task, NULL, sp, "");
 }
 
 /*
@@ -307,30 +307,30 @@ void show_registers(struct pt_regs *regs)
          * time of the fault..
          */
         if (!user_mode_vm(regs)) {
-                u8 *eip;
+                u8 *ip;
                 unsigned int code_prologue = code_bytes * 43 / 64;
                 unsigned int code_len = code_bytes;
                 unsigned char c;
 
                 printk("\n" KERN_EMERG "Stack: ");
-                show_stack_log_lvl(NULL, regs, &regs->esp, KERN_EMERG);
+                show_stack_log_lvl(NULL, regs, &regs->sp, KERN_EMERG);
 
                 printk(KERN_EMERG "Code: ");
 
-                eip = (u8 *)regs->eip - code_prologue;
-                if (eip < (u8 *)PAGE_OFFSET ||
-                        probe_kernel_address(eip, c)) {
+                ip = (u8 *)regs->ip - code_prologue;
+                if (ip < (u8 *)PAGE_OFFSET ||
+                        probe_kernel_address(ip, c)) {
                         /* try starting at EIP */
-                        eip = (u8 *)regs->eip;
+                        ip = (u8 *)regs->ip;
                         code_len = code_len - code_prologue + 1;
                 }
-                for (i = 0; i < code_len; i++, eip++) {
-                        if (eip < (u8 *)PAGE_OFFSET ||
-                                probe_kernel_address(eip, c)) {
+                for (i = 0; i < code_len; i++, ip++) {
+                        if (ip < (u8 *)PAGE_OFFSET ||
+                                probe_kernel_address(ip, c)) {
                                 printk(" Bad EIP value.");
                                 break;
                         }
-                        if (eip == (u8 *)regs->eip)
+                        if (ip == (u8 *)regs->ip)
                                 printk("<%02x> ", c);
                         else
                                 printk("%02x ", c);
@@ -339,13 +339,13 @@ void show_registers(struct pt_regs *regs)
         printk("\n");
 }       
 
-int is_valid_bugaddr(unsigned long eip)
+int is_valid_bugaddr(unsigned long ip)
 {
         unsigned short ud2;
 
-        if (eip < PAGE_OFFSET)
+        if (ip < PAGE_OFFSET)
                 return 0;
-        if (probe_kernel_address((unsigned short *)eip, ud2))
+        if (probe_kernel_address((unsigned short *)ip, ud2))
                 return 0;
 
         return ud2 == 0x0b0f;
@@ -382,10 +382,10 @@ void die(const char * str, struct pt_regs * regs, long err)
                 raw_local_irq_save(flags);
 
         if (++die.lock_owner_depth < 3) {
-                unsigned long esp;
+                unsigned long sp;
                 unsigned short ss;
 
-                report_bug(regs->eip, regs);
+                report_bug(regs->ip, regs);
 
                 printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff,
                        ++die_counter);
@@ -405,15 +405,15 @@ void die(const char * str, struct pt_regs * regs, long err)
                                 NOTIFY_STOP) {
                         show_registers(regs);
                         /* Executive summary in case the oops scrolled away */
-                        esp = (unsigned long) (&regs->esp);
+                        sp = (unsigned long) (&regs->sp);
                         savesegment(ss, ss);
                         if (user_mode(regs)) {
-                                esp = regs->esp;
-                                ss = regs->xss & 0xffff;
+                                sp = regs->sp;
+                                ss = regs->ss & 0xffff;
                         }
-                        printk(KERN_EMERG "EIP: [<%08lx>] ", regs->eip);
-                        print_symbol("%s", regs->eip);
-                        printk(" SS:ESP %04x:%08lx\n", ss, esp);
+                        printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+                        print_symbol("%s", regs->ip);
+                        printk(" SS:ESP %04x:%08lx\n", ss, sp);
                 }
                 else
                         regs = NULL;
@@ -454,7 +454,7 @@ static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
 {
         struct task_struct *tsk = current;
 
-        if (regs->eflags & VM_MASK) {
+        if (regs->flags & VM_MASK) {
                 if (vm86)
                         goto vm86_trap;
                 goto trap_signal;
@@ -548,13 +548,13 @@ fastcall void do_##name(struct pt_regs * regs, long error_code) \
         do_trap(trapnr, signr, str, 1, regs, error_code, &info); \
 }
 
-DO_VM86_ERROR_INFO( 0, SIGFPE,  "divide error", divide_error, FPE_INTDIV, regs->eip)
+DO_VM86_ERROR_INFO( 0, SIGFPE,  "divide error", divide_error, FPE_INTDIV, regs->ip)
 #ifndef CONFIG_KPROBES
 DO_VM86_ERROR( 3, SIGTRAP, "int3", int3)
 #endif
 DO_VM86_ERROR( 4, SIGSEGV, "overflow", overflow)
 DO_VM86_ERROR( 5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip, 0)
+DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
 DO_ERROR( 9, SIGFPE,  "coprocessor segment overrun", coprocessor_segment_overrun)
 DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
 DO_ERROR(11, SIGBUS,  "segment not present", segment_not_present)
@@ -596,7 +596,7 @@ fastcall void __kprobes do_general_protection(struct pt_regs * regs,
         }
         put_cpu();
 
-        if (regs->eflags & VM_MASK)
+        if (regs->flags & VM_MASK)
                 goto gp_in_vm86;
 
         if (!user_mode(regs))
@@ -607,9 +607,9 @@ fastcall void __kprobes do_general_protection(struct pt_regs * regs,
         if (show_unhandled_signals && unhandled_signal(current, SIGSEGV) &&
             printk_ratelimit())
                 printk(KERN_INFO
-                    "%s[%d] general protection eip:%lx esp:%lx error:%lx\n",
+                    "%s[%d] general protection ip:%lx sp:%lx error:%lx\n",
                     current->comm, task_pid_nr(current),
-                    regs->eip, regs->esp, error_code);
+                    regs->ip, regs->sp, error_code);
 
         force_sig(SIGSEGV, current);
         return;
@@ -705,8 +705,8 @@ void __kprobes die_nmi(struct pt_regs *regs, const char *msg)
         */
         bust_spinlocks(1);
         printk(KERN_EMERG "%s", msg);
-        printk(" on CPU%d, eip %08lx, registers:\n",
-                smp_processor_id(), regs->eip);
+        printk(" on CPU%d, ip %08lx, registers:\n",
+                smp_processor_id(), regs->ip);
         show_registers(regs);
         console_silent();
         spin_unlock(&nmi_print_lock);
@@ -847,7 +847,7 @@ fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
                                         SIGTRAP) == NOTIFY_STOP)
                 return;
         /* It's safe to allow irq's after DR6 has been saved */
-        if (regs->eflags & X86_EFLAGS_IF)
+        if (regs->flags & X86_EFLAGS_IF)
                 local_irq_enable();
 
         /* Mask out spurious debug traps due to lazy DR7 setting */
@@ -856,7 +856,7 @@ fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
                         goto clear_dr7;
         }
 
-        if (regs->eflags & VM_MASK)
+        if (regs->flags & VM_MASK)
                 goto debug_vm86;
 
         /* Save debug status register where ptrace can see it */
@@ -892,7 +892,7 @@ debug_vm86:
 
 clear_TF_reenable:
         set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         return;
 }
 
@@ -901,7 +901,7 @@ clear_TF_reenable:
  * the correct behaviour even in the presence of the asynchronous
  * IRQ13 behaviour
  */
-void math_error(void __user *eip)
+void math_error(void __user *ip)
 {
         struct task_struct * task;
         siginfo_t info;
@@ -917,7 +917,7 @@ void math_error(void __user *eip)
         info.si_signo = SIGFPE;
         info.si_errno = 0;
         info.si_code = __SI_FAULT;
-        info.si_addr = eip;
+        info.si_addr = ip;
         /*
          * (~cwd & swd) will mask out exceptions that are not set to unmasked
          * status.  0x3f is the exception bits in these regs, 0x200 is the
@@ -963,10 +963,10 @@ void math_error(void __user *eip)
 fastcall void do_coprocessor_error(struct pt_regs * regs, long error_code)
 {
         ignore_fpu_irq = 1;
-        math_error((void __user *)regs->eip);
+        math_error((void __user *)regs->ip);
 }
 
-static void simd_math_error(void __user *eip)
+static void simd_math_error(void __user *ip)
 {
         struct task_struct * task;
         siginfo_t info;
@@ -982,7 +982,7 @@ static void simd_math_error(void __user *eip)
         info.si_signo = SIGFPE;
         info.si_errno = 0;
         info.si_code = __SI_FAULT;
-        info.si_addr = eip;
+        info.si_addr = ip;
         /*
          * The SIMD FPU exceptions are handled a little differently, as there
          * is only a single status/control register.  Thus, to determine which
@@ -1020,13 +1020,13 @@ fastcall void do_simd_coprocessor_error(struct pt_regs * regs,
         if (cpu_has_xmm) {
                 /* Handle SIMD FPU exceptions on PIII+ processors. */
                 ignore_fpu_irq = 1;
-                simd_math_error((void __user *)regs->eip);
+                simd_math_error((void __user *)regs->ip);
         } else {
                 /*
                  * Handle strange cache flush from user space exception
                  * in all other cases.  This is undocumented behaviour.
                  */
-                if (regs->eflags & VM_MASK) {
+                if (regs->flags & VM_MASK) {
                         handle_vm86_fault((struct kernel_vm86_regs *)regs,
                                           error_code);
                         return;
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
index 610a64d6bdf0..f7fecf9d47c3 100644
--- a/arch/x86/kernel/traps_64.c
+++ b/arch/x86/kernel/traps_64.c
@@ -76,20 +76,20 @@ asmlinkage void spurious_interrupt_bug(void);
 
 static inline void conditional_sti(struct pt_regs *regs)
 {
-        if (regs->eflags & X86_EFLAGS_IF)
+        if (regs->flags & X86_EFLAGS_IF)
                 local_irq_enable();
 }
 
 static inline void preempt_conditional_sti(struct pt_regs *regs)
 {
         preempt_disable();
-        if (regs->eflags & X86_EFLAGS_IF)
+        if (regs->flags & X86_EFLAGS_IF)
                 local_irq_enable();
 }
 
 static inline void preempt_conditional_cli(struct pt_regs *regs)
 {
-        if (regs->eflags & X86_EFLAGS_IF)
+        if (regs->flags & X86_EFLAGS_IF)
                 local_irq_disable();
         /* Make sure to not schedule here because we could be running
            on an exception stack. */
@@ -353,7 +353,7 @@ show_trace(struct task_struct *tsk, struct pt_regs *regs, unsigned long *stack)
 }
 
 static void
-_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *rsp)
+_show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *sp)
 {
         unsigned long *stack;
         int i;
@@ -364,14 +364,14 @@ _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *rsp)
         // debugging aid: "show_stack(NULL, NULL);" prints the
         // back trace for this cpu.
 
-        if (rsp == NULL) {
+        if (sp == NULL) {
                 if (tsk)
-                        rsp = (unsigned long *)tsk->thread.rsp;
+                        sp = (unsigned long *)tsk->thread.rsp;
                 else
-                        rsp = (unsigned long *)&rsp;
+                        sp = (unsigned long *)&sp;
         }
 
-        stack = rsp;
+        stack = sp;
         for(i=0; i < kstack_depth_to_print; i++) {
                 if (stack >= irqstack && stack <= irqstack_end) {
                         if (stack == irqstack_end) {
@@ -387,12 +387,12 @@ _show_stack(struct task_struct *tsk, struct pt_regs *regs, unsigned long *rsp)
                 printk(" %016lx", *stack++);
                 touch_nmi_watchdog();
         }
-        show_trace(tsk, regs, rsp);
+        show_trace(tsk, regs, sp);
 }
 
-void show_stack(struct task_struct *tsk, unsigned long * rsp)
+void show_stack(struct task_struct *tsk, unsigned long * sp)
 {
-        _show_stack(tsk, NULL, rsp);
+        _show_stack(tsk, NULL, sp);
 }
 
 /*
@@ -416,11 +416,11 @@ void show_registers(struct pt_regs *regs)
 {
         int i;
         int in_kernel = !user_mode(regs);
-        unsigned long rsp;
+        unsigned long sp;
         const int cpu = smp_processor_id();
         struct task_struct *cur = cpu_pda(cpu)->pcurrent;
 
-        rsp = regs->rsp;
+        sp = regs->sp;
         printk("CPU %d ", cpu);
         __show_regs(regs);
         printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
@@ -432,15 +432,15 @@ void show_registers(struct pt_regs *regs)
          */
         if (in_kernel) {
                 printk("Stack: ");
-                _show_stack(NULL, regs, (unsigned long*)rsp);
+                _show_stack(NULL, regs, (unsigned long*)sp);
 
                 printk("\nCode: ");
-                if (regs->rip < PAGE_OFFSET)
+                if (regs->ip < PAGE_OFFSET)
                         goto bad;
 
                 for (i=0; i<20; i++) {
                         unsigned char c;
-                        if (__get_user(c, &((unsigned char*)regs->rip)[i])) {
+                        if (__get_user(c, &((unsigned char*)regs->ip)[i])) {
 bad:
                                 printk(" Bad RIP value.");
                                 break;
@@ -451,11 +451,11 @@ bad:
         printk("\n");
 }       
 
-int is_valid_bugaddr(unsigned long rip)
+int is_valid_bugaddr(unsigned long ip)
 {
         unsigned short ud2;
 
-        if (__copy_from_user(&ud2, (const void __user *) rip, sizeof(ud2)))
+        if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
                 return 0;
 
         return ud2 == 0x0b0f;
@@ -521,8 +521,8 @@ void __kprobes __die(const char * str, struct pt_regs * regs, long err)
         add_taint(TAINT_DIE);
         /* Executive summary in case the oops scrolled away */
         printk(KERN_ALERT "RIP ");
-        printk_address(regs->rip); 
-        printk(" RSP <%016lx>\n", regs->rsp); 
+        printk_address(regs->ip);
+        printk(" RSP <%016lx>\n", regs->sp);
         if (kexec_should_crash(current))
                 crash_kexec(regs);
 }
@@ -532,7 +532,7 @@ void die(const char * str, struct pt_regs * regs, long err)
         unsigned long flags = oops_begin();
 
         if (!user_mode(regs))
-                report_bug(regs->rip, regs);
+                report_bug(regs->ip, regs);
 
         __die(str, regs, err);
         oops_end(flags);
@@ -582,9 +582,9 @@ static void __kprobes do_trap(int trapnr, int signr, char *str,
                 if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
                     printk_ratelimit())
                         printk(KERN_INFO
-                               "%s[%d] trap %s rip:%lx rsp:%lx error:%lx\n",
+                               "%s[%d] trap %s ip:%lx sp:%lx error:%lx\n",
                                tsk->comm, tsk->pid, str,
-                               regs->rip, regs->rsp, error_code); 
+                               regs->ip, regs->sp, error_code);
 
                 if (info)
                         force_sig_info(signr, info, tsk);
@@ -597,9 +597,9 @@ static void __kprobes do_trap(int trapnr, int signr, char *str,
         /* kernel trap */ 
         {            
                 const struct exception_table_entry *fixup;
-                fixup = search_exception_tables(regs->rip);
+                fixup = search_exception_tables(regs->ip);
                 if (fixup)
-                        regs->rip = fixup->fixup;
+                        regs->ip = fixup->fixup;
                 else {
                         tsk->thread.error_code = error_code;
                         tsk->thread.trap_no = trapnr;
@@ -635,10 +635,10 @@ asmlinkage void do_##name(struct pt_regs * regs, long error_code) \
         do_trap(trapnr, signr, str, regs, error_code, &info); \
 }
 
-DO_ERROR_INFO( 0, SIGFPE,  "divide error", divide_error, FPE_INTDIV, regs->rip)
+DO_ERROR_INFO( 0, SIGFPE,  "divide error", divide_error, FPE_INTDIV, regs->ip)
 DO_ERROR( 4, SIGSEGV, "overflow", overflow)
 DO_ERROR( 5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->rip)
+DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
 DO_ERROR( 7, SIGSEGV, "device not available", device_not_available)
 DO_ERROR( 9, SIGFPE,  "coprocessor segment overrun", coprocessor_segment_overrun)
 DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
@@ -688,9 +688,9 @@ asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
                 if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
                     printk_ratelimit())
                         printk(KERN_INFO
-                       "%s[%d] general protection rip:%lx rsp:%lx error:%lx\n",
+                       "%s[%d] general protection ip:%lx sp:%lx error:%lx\n",
                                tsk->comm, tsk->pid,
-                               regs->rip, regs->rsp, error_code); 
+                               regs->ip, regs->sp, error_code);
 
                 force_sig(SIGSEGV, tsk);
                 return;
@@ -699,9 +699,9 @@ asmlinkage void __kprobes do_general_protection(struct pt_regs * regs,
         /* kernel gp */
         {
                 const struct exception_table_entry *fixup;
-                fixup = search_exception_tables(regs->rip);
+                fixup = search_exception_tables(regs->ip);
                 if (fixup) {
-                        regs->rip = fixup->fixup;
+                        regs->ip = fixup->fixup;
                         return;
                 }
 
@@ -824,15 +824,15 @@ asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
 {
         struct pt_regs *regs = eregs;
         /* Did already sync */
-        if (eregs == (struct pt_regs *)eregs->rsp)
+        if (eregs == (struct pt_regs *)eregs->sp)
                 ;
         /* Exception from user space */
         else if (user_mode(eregs))
                 regs = task_pt_regs(current);
         /* Exception from kernel and interrupts are enabled. Move to
            kernel process stack. */
-        else if (eregs->eflags & X86_EFLAGS_IF)
-                regs = (struct pt_regs *)(eregs->rsp -= sizeof(struct pt_regs));
+        else if (eregs->flags & X86_EFLAGS_IF)
+                regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
         if (eregs != regs)
                 *regs = *eregs;
         return regs;
@@ -887,7 +887,7 @@ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
         info.si_signo = SIGTRAP;
         info.si_errno = 0;
         info.si_code = TRAP_BRKPT;
-        info.si_addr = user_mode(regs) ? (void __user *)regs->rip : NULL;
+        info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
         force_sig_info(SIGTRAP, &info, tsk);
 
 clear_dr7:
@@ -897,16 +897,16 @@ clear_dr7:
 
 clear_TF_reenable:
         set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-        regs->eflags &= ~TF_MASK;
+        regs->flags &= ~TF_MASK;
         preempt_conditional_cli(regs);
 }
 
 static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
 {
         const struct exception_table_entry *fixup;
-        fixup = search_exception_tables(regs->rip);
+        fixup = search_exception_tables(regs->ip);
         if (fixup) {
-                regs->rip = fixup->fixup;
+                regs->ip = fixup->fixup;
                 return 1;
         }
         notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
@@ -923,7 +923,7 @@ static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
  */
 asmlinkage void do_coprocessor_error(struct pt_regs *regs)
 {
-        void __user *rip = (void __user *)(regs->rip);
+        void __user *ip = (void __user *)(regs->ip);
         struct task_struct * task;
         siginfo_t info;
         unsigned short cwd, swd;
@@ -943,7 +943,7 @@ asmlinkage void do_coprocessor_error(struct pt_regs *regs)
         info.si_signo = SIGFPE;
         info.si_errno = 0;
         info.si_code = __SI_FAULT;
-        info.si_addr = rip;
+        info.si_addr = ip;
         /*
          * (~cwd & swd) will mask out exceptions that are not set to unmasked
          * status.  0x3f is the exception bits in these regs, 0x200 is the
@@ -992,7 +992,7 @@ asmlinkage void bad_intr(void)
 
 asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
 {
-        void __user *rip = (void __user *)(regs->rip);
+        void __user *ip = (void __user *)(regs->ip);
         struct task_struct * task;
         siginfo_t info;
         unsigned short mxcsr;
@@ -1012,7 +1012,7 @@ asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
         info.si_signo = SIGFPE;
         info.si_errno = 0;
         info.si_code = __SI_FAULT;
-        info.si_addr = rip;
+        info.si_addr = ip;
         /*
          * The SIMD FPU exceptions are handled a little differently, as there
          * is only a single status/control register.  Thus, to determine which
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 157e4bedd3c5..980e85b90091 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -70,10 +70,10 @@
 /*
  * 8- and 16-bit register defines..
  */
-#define AL(regs)        (((unsigned char *)&((regs)->pt.eax))[0])
-#define AH(regs)        (((unsigned char *)&((regs)->pt.eax))[1])
-#define IP(regs)        (*(unsigned short *)&((regs)->pt.eip))
-#define SP(regs)        (*(unsigned short *)&((regs)->pt.esp))
+#define AL(regs)        (((unsigned char *)&((regs)->pt.ax))[0])
+#define AH(regs)        (((unsigned char *)&((regs)->pt.ax))[1])
+#define IP(regs)        (*(unsigned short *)&((regs)->pt.ip))
+#define SP(regs)        (*(unsigned short *)&((regs)->pt.sp))
 
 /*
  * virtual flags (16 and 32-bit versions)
@@ -93,12 +93,12 @@ static int copy_vm86_regs_to_user(struct vm86_regs __user *user,
 {
         int ret = 0;
 
-        /* kernel_vm86_regs is missing xgs, so copy everything up to
+        /* kernel_vm86_regs is missing gs, so copy everything up to
            (but not including) orig_eax, and then rest including orig_eax. */
-        ret += copy_to_user(user, regs, offsetof(struct kernel_vm86_regs, pt.orig_eax));
-        ret += copy_to_user(&user->orig_eax, &regs->pt.orig_eax,
+        ret += copy_to_user(user, regs, offsetof(struct kernel_vm86_regs, pt.orig_ax));
+        ret += copy_to_user(&user->orig_eax, &regs->pt.orig_ax,
                             sizeof(struct kernel_vm86_regs) -
-                            offsetof(struct kernel_vm86_regs, pt.orig_eax));
+                            offsetof(struct kernel_vm86_regs, pt.orig_ax));
 
         return ret;
 }
@@ -110,12 +110,12 @@ static int copy_vm86_regs_from_user(struct kernel_vm86_regs *regs,
 {
         int ret = 0;
 
-        /* copy eax-xfs inclusive */
-        ret += copy_from_user(regs, user, offsetof(struct kernel_vm86_regs, pt.orig_eax));
-        /* copy orig_eax-__gsh+extra */
-        ret += copy_from_user(&regs->pt.orig_eax, &user->orig_eax,
+        /* copy ax-fs inclusive */
+        ret += copy_from_user(regs, user, offsetof(struct kernel_vm86_regs, pt.orig_ax));
+        /* copy orig_ax-__gsh+extra */
+        ret += copy_from_user(&regs->pt.orig_ax, &user->orig_eax,
                               sizeof(struct kernel_vm86_regs) -
-                              offsetof(struct kernel_vm86_regs, pt.orig_eax) +
+                              offsetof(struct kernel_vm86_regs, pt.orig_ax) +
                               extra);
         return ret;
 }
@@ -138,7 +138,7 @@ struct pt_regs * fastcall save_v86_state(struct kernel_vm86_regs * regs)
                 printk("no vm86_info: BAD\n");
                 do_exit(SIGSEGV);
         }
-        set_flags(regs->pt.eflags, VEFLAGS, VIF_MASK | current->thread.v86mask);
+        set_flags(regs->pt.flags, VEFLAGS, VIF_MASK | current->thread.v86mask);
         tmp = copy_vm86_regs_to_user(&current->thread.vm86_info->regs,regs);
         tmp += put_user(current->thread.screen_bitmap,&current->thread.vm86_info->screen_bitmap);
         if (tmp) {
@@ -155,7 +155,7 @@ struct pt_regs * fastcall save_v86_state(struct kernel_vm86_regs * regs)
 
         ret = KVM86->regs32;
 
-        ret->xfs = current->thread.saved_fs;
+        ret->fs = current->thread.saved_fs;
         loadsegment(gs, current->thread.saved_gs);
 
         return ret;
@@ -197,7 +197,7 @@ static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk
 
 asmlinkage int sys_vm86old(struct pt_regs regs)
 {
-        struct vm86_struct __user *v86 = (struct vm86_struct __user *)regs.ebx;
+        struct vm86_struct __user *v86 = (struct vm86_struct __user *)regs.bx;
         struct kernel_vm86_struct info; /* declare this _on top_,
                                          * this avoids wasting of stack space.
                                          * This remains on the stack until we
@@ -237,12 +237,12 @@ asmlinkage int sys_vm86(struct pt_regs regs)
         struct vm86plus_struct __user *v86;
 
         tsk = current;
-        switch (regs.ebx) {
+        switch (regs.bx) {
                 case VM86_REQUEST_IRQ:
                 case VM86_FREE_IRQ:
                 case VM86_GET_IRQ_BITS:
                 case VM86_GET_AND_RESET_IRQ:
-                        ret = do_vm86_irq_handling(regs.ebx, (int)regs.ecx);
+                        ret = do_vm86_irq_handling(regs.bx, (int)regs.cx);
                         goto out;
                 case VM86_PLUS_INSTALL_CHECK:
                         /* NOTE: on old vm86 stuff this will return the error
@@ -258,7 +258,7 @@ asmlinkage int sys_vm86(struct pt_regs regs)
         ret = -EPERM;
         if (tsk->thread.saved_esp0)
                 goto out;
-        v86 = (struct vm86plus_struct __user *)regs.ecx;
+        v86 = (struct vm86plus_struct __user *)regs.cx;
         tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
                                        offsetof(struct kernel_vm86_struct, regs32) -
                                        sizeof(info.regs));
@@ -281,23 +281,23 @@ static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk
 /*
  * make sure the vm86() system call doesn't try to do anything silly
  */
-        info->regs.pt.xds = 0;
-        info->regs.pt.xes = 0;
-        info->regs.pt.xfs = 0;
+        info->regs.pt.ds = 0;
+        info->regs.pt.es = 0;
+        info->regs.pt.fs = 0;
 
 /* we are clearing gs later just before "jmp resume_userspace",
  * because it is not saved/restored.
  */
 
 /*
- * The eflags register is also special: we cannot trust that the user
+ * The flags register is also special: we cannot trust that the user
  * has set it up safely, so this makes sure interrupt etc flags are
  * inherited from protected mode.
  */
-        VEFLAGS = info->regs.pt.eflags;
-        info->regs.pt.eflags &= SAFE_MASK;
-        info->regs.pt.eflags |= info->regs32->eflags & ~SAFE_MASK;
-        info->regs.pt.eflags |= VM_MASK;
+        VEFLAGS = info->regs.pt.flags;
+        info->regs.pt.flags &= SAFE_MASK;
+        info->regs.pt.flags |= info->regs32->flags & ~SAFE_MASK;
+        info->regs.pt.flags |= VM_MASK;
 
         switch (info->cpu_type) {
                 case CPU_286:
@@ -315,11 +315,11 @@ static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk
         }
 
 /*
- * Save old state, set default return value (%eax) to 0
+ * Save old state, set default return value (%ax) to 0
  */
-        info->regs32->eax = 0;
+        info->regs32->ax = 0;
         tsk->thread.saved_esp0 = tsk->thread.esp0;
-        tsk->thread.saved_fs = info->regs32->xfs;
+        tsk->thread.saved_fs = info->regs32->fs;
         savesegment(gs, tsk->thread.saved_gs);
 
         tss = &per_cpu(init_tss, get_cpu());
@@ -352,7 +352,7 @@ static inline void return_to_32bit(struct kernel_vm86_regs * regs16, int retval)
         struct pt_regs * regs32;
 
         regs32 = save_v86_state(regs16);
-        regs32->eax = retval;
+        regs32->ax = retval;
         __asm__ __volatile__("movl %0,%%esp\n\t"
                 "movl %1,%%ebp\n\t"
                 "jmp resume_userspace"
@@ -373,12 +373,12 @@ static inline void clear_IF(struct kernel_vm86_regs * regs)
 
 static inline void clear_TF(struct kernel_vm86_regs * regs)
 {
-        regs->pt.eflags &= ~TF_MASK;
+        regs->pt.flags &= ~TF_MASK;
 }
 
 static inline void clear_AC(struct kernel_vm86_regs * regs)
 {
-        regs->pt.eflags &= ~AC_MASK;
+        regs->pt.flags &= ~AC_MASK;
 }
 
 /* It is correct to call set_IF(regs) from the set_vflags_*
@@ -392,11 +392,11 @@ static inline void clear_AC(struct kernel_vm86_regs * regs)
  * [KD]
  */
 
-static inline void set_vflags_long(unsigned long eflags, struct kernel_vm86_regs * regs)
+static inline void set_vflags_long(unsigned long flags, struct kernel_vm86_regs * regs)
 {
-        set_flags(VEFLAGS, eflags, current->thread.v86mask);
-        set_flags(regs->pt.eflags, eflags, SAFE_MASK);
-        if (eflags & IF_MASK)
+        set_flags(VEFLAGS, flags, current->thread.v86mask);
+        set_flags(regs->pt.flags, flags, SAFE_MASK);
+        if (flags & IF_MASK)
                 set_IF(regs);
         else
                 clear_IF(regs);
@@ -405,7 +405,7 @@ static inline void set_vflags_long(unsigned long eflags, struct kernel_vm86_regs
 static inline void set_vflags_short(unsigned short flags, struct kernel_vm86_regs * regs)
 {
         set_flags(VFLAGS, flags, current->thread.v86mask);
-        set_flags(regs->pt.eflags, flags, SAFE_MASK);
+        set_flags(regs->pt.flags, flags, SAFE_MASK);
         if (flags & IF_MASK)
                 set_IF(regs);
         else
@@ -414,7 +414,7 @@ static inline void set_vflags_short(unsigned short flags, struct kernel_vm86_reg
 
 static inline unsigned long get_vflags(struct kernel_vm86_regs * regs)
 {
-        unsigned long flags = regs->pt.eflags & RETURN_MASK;
+        unsigned long flags = regs->pt.flags & RETURN_MASK;
 
         if (VEFLAGS & VIF_MASK)
                 flags |= IF_MASK;
@@ -518,7 +518,7 @@ static void do_int(struct kernel_vm86_regs *regs, int i,
         unsigned long __user *intr_ptr;
         unsigned long segoffs;
 
-        if (regs->pt.xcs == BIOSSEG)
+        if (regs->pt.cs == BIOSSEG)
                 goto cannot_handle;
         if (is_revectored(i, &KVM86->int_revectored))
                 goto cannot_handle;
@@ -530,9 +530,9 @@ static void do_int(struct kernel_vm86_regs *regs, int i,
         if ((segoffs >> 16) == BIOSSEG)
                 goto cannot_handle;
         pushw(ssp, sp, get_vflags(regs), cannot_handle);
-        pushw(ssp, sp, regs->pt.xcs, cannot_handle);
+        pushw(ssp, sp, regs->pt.cs, cannot_handle);
         pushw(ssp, sp, IP(regs), cannot_handle);
-        regs->pt.xcs = segoffs >> 16;
+        regs->pt.cs = segoffs >> 16;
         SP(regs) -= 6;
         IP(regs) = segoffs & 0xffff;
         clear_TF(regs);
@@ -549,7 +549,7 @@ int handle_vm86_trap(struct kernel_vm86_regs * regs, long error_code, int trapno
         if (VMPI.is_vm86pus) {
                 if ( (trapno==3) || (trapno==1) )
                         return_to_32bit(regs, VM86_TRAP + (trapno << 8));
-                do_int(regs, trapno, (unsigned char __user *) (regs->pt.xss << 4), SP(regs));
+                do_int(regs, trapno, (unsigned char __user *) (regs->pt.ss << 4), SP(regs));
                 return 0;
         }
         if (trapno !=1)
@@ -585,10 +585,10 @@ void handle_vm86_fault(struct kernel_vm86_regs * regs, long error_code)
                 handle_vm86_trap(regs, 0, 1); \
         return; } while (0)
 
-        orig_flags = *(unsigned short *)&regs->pt.eflags;
+        orig_flags = *(unsigned short *)&regs->pt.flags;
 
-        csp = (unsigned char __user *) (regs->pt.xcs << 4);
-        ssp = (unsigned char __user *) (regs->pt.xss << 4);
+        csp = (unsigned char __user *) (regs->pt.cs << 4);
+        ssp = (unsigned char __user *) (regs->pt.ss << 4);
         sp = SP(regs);
         ip = IP(regs);
 
@@ -675,7 +675,7 @@ void handle_vm86_fault(struct kernel_vm86_regs * regs, long error_code)
                         SP(regs) += 6;
                 }
                 IP(regs) = newip;
-                regs->pt.xcs = newcs;
+                regs->pt.cs = newcs;
                 CHECK_IF_IN_TRAP;
                 if (data32) {
                         set_vflags_long(newflags, regs);
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 87e5633805a9..599b6f2ed562 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -88,13 +88,13 @@ struct vmi_timer_ops vmi_timer_ops;
 #define IRQ_PATCH_DISABLE  5
 
 static inline void patch_offset(void *insnbuf,
-                                unsigned long eip, unsigned long dest)
+                                unsigned long ip, unsigned long dest)
 {
-        *(unsigned long *)(insnbuf+1) = dest-eip-5;
+        *(unsigned long *)(insnbuf+1) = dest-ip-5;
 }
 
 static unsigned patch_internal(int call, unsigned len, void *insnbuf,
-                               unsigned long eip)
+                               unsigned long ip)
 {
         u64 reloc;
         struct vmi_relocation_info *const rel = (struct vmi_relocation_info *)&reloc;
@@ -103,13 +103,13 @@ static unsigned patch_internal(int call, unsigned len, void *insnbuf,
                 case VMI_RELOCATION_CALL_REL:
                         BUG_ON(len < 5);
                         *(char *)insnbuf = MNEM_CALL;
-                        patch_offset(insnbuf, eip, (unsigned long)rel->eip);
+                        patch_offset(insnbuf, ip, (unsigned long)rel->eip);
                         return 5;
 
                 case VMI_RELOCATION_JUMP_REL:
                         BUG_ON(len < 5);
                         *(char *)insnbuf = MNEM_JMP;
-                        patch_offset(insnbuf, eip, (unsigned long)rel->eip);
+                        patch_offset(insnbuf, ip, (unsigned long)rel->eip);
                         return 5;
 
                 case VMI_RELOCATION_NOP:
@@ -131,25 +131,25 @@ static unsigned patch_internal(int call, unsigned len, void *insnbuf,
  * sequence.  The callee does nop padding for us.
  */
 static unsigned vmi_patch(u8 type, u16 clobbers, void *insns,
-                          unsigned long eip, unsigned len)
+                          unsigned long ip, unsigned len)
 {
         switch (type) {
                 case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
                         return patch_internal(VMI_CALL_DisableInterrupts, len,
-                                              insns, eip);
+                                              insns, ip);
                 case PARAVIRT_PATCH(pv_irq_ops.irq_enable):
                         return patch_internal(VMI_CALL_EnableInterrupts, len,
-                                              insns, eip);
+                                              insns, ip);
                 case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
                         return patch_internal(VMI_CALL_SetInterruptMask, len,
-                                              insns, eip);
+                                              insns, ip);
                 case PARAVIRT_PATCH(pv_irq_ops.save_fl):
                         return patch_internal(VMI_CALL_GetInterruptMask, len,
-                                              insns, eip);
+                                              insns, ip);
                 case PARAVIRT_PATCH(pv_cpu_ops.iret):
-                        return patch_internal(VMI_CALL_IRET, len, insns, eip);
+                        return patch_internal(VMI_CALL_IRET, len, insns, ip);
                 case PARAVIRT_PATCH(pv_cpu_ops.irq_enable_syscall_ret):
-                        return patch_internal(VMI_CALL_SYSEXIT, len, insns, eip);
+                        return patch_internal(VMI_CALL_SYSEXIT, len, insns, ip);
                 default:
                         break;
         }
@@ -157,29 +157,29 @@ static unsigned vmi_patch(u8 type, u16 clobbers, void *insns,
 }
 
 /* CPUID has non-C semantics, and paravirt-ops API doesn't match hardware ISA */
-static void vmi_cpuid(unsigned int *eax, unsigned int *ebx,
-                               unsigned int *ecx, unsigned int *edx)
+static void vmi_cpuid(unsigned int *ax, unsigned int *bx,
+                               unsigned int *cx, unsigned int *dx)
 {
         int override = 0;
-        if (*eax == 1)
+        if (*ax == 1)
                 override = 1;
         asm volatile ("call *%6"
-                      : "=a" (*eax),
-                        "=b" (*ebx),
-                        "=c" (*ecx),
-                        "=d" (*edx)
-                      : "0" (*eax), "2" (*ecx), "r" (vmi_ops.cpuid));
+                      : "=a" (*ax),
+                        "=b" (*bx),
+                        "=c" (*cx),
+                        "=d" (*dx)
+                      : "0" (*ax), "2" (*cx), "r" (vmi_ops.cpuid));
         if (override) {
                 if (disable_pse)
-                        *edx &= ~X86_FEATURE_PSE;
+                        *dx &= ~X86_FEATURE_PSE;
                 if (disable_pge)
-                        *edx &= ~X86_FEATURE_PGE;
+                        *dx &= ~X86_FEATURE_PGE;
                 if (disable_sep)
-                        *edx &= ~X86_FEATURE_SEP;
+                        *dx &= ~X86_FEATURE_SEP;
                 if (disable_tsc)
-                        *edx &= ~X86_FEATURE_TSC;
+                        *dx &= ~X86_FEATURE_TSC;
                 if (disable_mtrr)
-                        *edx &= ~X86_FEATURE_MTRR;
+                        *dx &= ~X86_FEATURE_MTRR;
         }
 }
 
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index ad4005c6d4a1..018f7cf33790 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -43,7 +43,7 @@
 #include <asm/vgtod.h>
 
 #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
-#define __syscall_clobber "r11","rcx","memory"
+#define __syscall_clobber "r11","cx","memory"
 #define __pa_vsymbol(x)                 \
         ({unsigned long v;              \
         extern char __vsyscall_0;       \
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index df04bf884dd4..ea46d05853bb 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -175,8 +175,8 @@ static void lguest_leave_lazy_mode(void)
  * check there when it wants to deliver an interrupt.
  */
 
-/* save_flags() is expected to return the processor state (ie. "eflags").  The
- * eflags word contains all kind of stuff, but in practice Linux only cares
+/* save_flags() is expected to return the processor state (ie. "flags").  The
+ * flags word contains all kind of stuff, but in practice Linux only cares
  * about the interrupt flag.  Our "save_flags()" just returns that. */
 static unsigned long save_fl(void)
 {
@@ -323,30 +323,30 @@ static void lguest_load_tr_desc(void)
  * anyone (including userspace) can just use the raw "cpuid" instruction and
  * the Host won't even notice since it isn't privileged.  So we try not to get
  * too worked up about it. */
-static void lguest_cpuid(unsigned int *eax, unsigned int *ebx,
-                         unsigned int *ecx, unsigned int *edx)
+static void lguest_cpuid(unsigned int *ax, unsigned int *bx,
+                         unsigned int *cx, unsigned int *dx)
 {
-        int function = *eax;
+        int function = *ax;
 
-        native_cpuid(eax, ebx, ecx, edx);
+        native_cpuid(ax, bx, cx, dx);
         switch (function) {
         case 1: /* Basic feature request. */
                 /* We only allow kernel to see SSE3, CMPXCHG16B and SSSE3 */
-                *ecx &= 0x00002201;
+                *cx &= 0x00002201;
                 /* SSE, SSE2, FXSR, MMX, CMOV, CMPXCHG8B, FPU. */
-                *edx &= 0x07808101;
+                *dx &= 0x07808101;
                 /* The Host can do a nice optimization if it knows that the
                  * kernel mappings (addresses above 0xC0000000 or whatever
                  * PAGE_OFFSET is set to) haven't changed.  But Linux calls
                  * flush_tlb_user() for both user and kernel mappings unless
                  * the Page Global Enable (PGE) feature bit is set. */
-                *edx |= 0x00002000;
+                *dx |= 0x00002000;
                 break;
         case 0x80000000:
                 /* Futureproof this a little: if they ask how much extended
                  * processor information there is, limit it to known fields. */
-                if (*eax > 0x80000008)
-                        *eax = 0x80000008;
+                if (*ax > 0x80000008)
+                        *ax = 0x80000008;
                 break;
         }
 }
diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index b472a2df0b7f..f2c13482acc0 100644
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -526,7 +526,7 @@ static void __init do_boot_cpu(__u8 cpu)
          * initial kernel stack.  We need to alter this to give the
          * booting CPU a new stack (taken from its idle process) */
         extern struct {
-                __u8 *esp;
+                __u8 *sp;
                 unsigned short ss;
         } stack_start;
         /* This is the format of the CPI IDT gate (in real mode) which
@@ -555,9 +555,9 @@ static void __init do_boot_cpu(__u8 cpu)
         idle = fork_idle(cpu);
         if (IS_ERR(idle))
                 panic("failed fork for CPU%d", cpu);
-        idle->thread.eip = (unsigned long)start_secondary;
+        idle->thread.ip = (unsigned long)start_secondary;
         /* init_tasks (in sched.c) is indexed logically */
-        stack_start.esp = (void *)idle->thread.esp;
+        stack_start.sp = (void *)idle->thread.sp;
 
         init_gdt(cpu);
         per_cpu(current_task, cpu) = idle;
@@ -567,7 +567,7 @@ static void __init do_boot_cpu(__u8 cpu)
         /* Note: Don't modify initial ss override */
         VDEBUG(("VOYAGER SMP: Booting CPU%d at 0x%lx[%x:%x], stack %p\n", cpu,
                 (unsigned long)hijack_source.val, hijack_source.idt.Segment,
-                hijack_source.idt.Offset, stack_start.esp));
+                hijack_source.idt.Offset, stack_start.sp));
 
         /* init lowmem identity mapping */
         clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
@@ -745,8 +745,8 @@ void __init initialize_secondary(void)
          */
 
         asm volatile ("movl %0,%%esp\n\t"
-                      "jmp *%1"::"r" (current->thread.esp),
-                      "r"(current->thread.eip));
+                      "jmp *%1"::"r" (current->thread.sp),
+                      "r"(current->thread.ip));
 }
 
 /* handle a Voyager SYS_INT -- If we don't, the base board will
diff --git a/arch/x86/mm/extable_32.c b/arch/x86/mm/extable_32.c
index 0ce4f22a2635..41685461f8b2 100644
--- a/arch/x86/mm/extable_32.c
+++ b/arch/x86/mm/extable_32.c
@@ -11,7 +11,7 @@ int fixup_exception(struct pt_regs *regs)
         const struct exception_table_entry *fixup;
 
 #ifdef CONFIG_PNPBIOS
-        if (unlikely(SEGMENT_IS_PNP_CODE(regs->xcs)))
+        if (unlikely(SEGMENT_IS_PNP_CODE(regs->cs)))
         {
                 extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
                 extern u32 pnp_bios_is_utter_crap;
@@ -25,9 +25,9 @@ int fixup_exception(struct pt_regs *regs)
         }
 #endif
 
-        fixup = search_exception_tables(regs->eip);
+        fixup = search_exception_tables(regs->ip);
         if (fixup) {
-                regs->eip = fixup->fixup;
+                regs->ip = fixup->fixup;
                 return 1;
         }
 
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index a2273d44aa27..6056c6d71835 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -72,15 +72,15 @@ static inline int notify_page_fault(struct pt_regs *regs)
 static inline unsigned long get_segment_eip(struct pt_regs *regs,
                                             unsigned long *eip_limit)
 {
-        unsigned long eip = regs->eip;
-        unsigned seg = regs->xcs & 0xffff;
+        unsigned long ip = regs->ip;
+        unsigned seg = regs->cs & 0xffff;
         u32 seg_ar, seg_limit, base, *desc;
 
         /* Unlikely, but must come before segment checks. */
-        if (unlikely(regs->eflags & VM_MASK)) {
+        if (unlikely(regs->flags & VM_MASK)) {
                 base = seg << 4;
                 *eip_limit = base + 0xffff;
-                return base + (eip & 0xffff);
+                return base + (ip & 0xffff);
         }
 
         /* The standard kernel/user address space limit. */
@@ -88,16 +88,16 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
         
         /* By far the most common cases. */
         if (likely(SEGMENT_IS_FLAT_CODE(seg)))
-                return eip;
+                return ip;
 
         /* Check the segment exists, is within the current LDT/GDT size,
            that kernel/user (ring 0..3) has the appropriate privilege,
            that it's a code segment, and get the limit. */
         __asm__ ("larl %3,%0; lsll %3,%1"
                  : "=&r" (seg_ar), "=r" (seg_limit) : "0" (0), "rm" (seg));
-        if ((~seg_ar & 0x9800) || eip > seg_limit) {
+        if ((~seg_ar & 0x9800) || ip > seg_limit) {
                 *eip_limit = 0;
-                return 1;        /* So that returned eip > *eip_limit. */
+                return 1;        /* So that returned ip > *eip_limit. */
         }
 
         /* Get the GDT/LDT descriptor base. 
@@ -127,7 +127,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
         seg_limit += base;
         if (seg_limit < *eip_limit && seg_limit >= base)
                 *eip_limit = seg_limit;
-        return eip + base;
+        return ip + base;
 }
 
 /* 
@@ -345,7 +345,7 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs,
 
         /* It's safe to allow irq's after cr2 has been saved and the vmalloc
            fault has been handled. */
-        if (regs->eflags & (X86_EFLAGS_IF|VM_MASK))
+        if (regs->flags & (X86_EFLAGS_IF|VM_MASK))
                 local_irq_enable();
 
         mm = tsk->mm;
@@ -374,7 +374,7 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs,
          */
         if (!down_read_trylock(&mm->mmap_sem)) {
                 if ((error_code & 4) == 0 &&
-                    !search_exception_tables(regs->eip))
+                    !search_exception_tables(regs->ip))
                         goto bad_area_nosemaphore;
                 down_read(&mm->mmap_sem);
         }
@@ -388,12 +388,12 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs,
                 goto bad_area;
         if (error_code & 4) {
                 /*
-                 * Accessing the stack below %esp is always a bug.
+                 * Accessing the stack below %sp is always a bug.
                  * The large cushion allows instructions like enter
                  * and pusha to work.  ("enter $65535,$31" pushes
-                 * 32 pointers and then decrements %esp by 65535.)
+                 * 32 pointers and then decrements %sp by 65535.)
                  */
-                if (address + 65536 + 32 * sizeof(unsigned long) < regs->esp)
+                if (address + 65536 + 32 * sizeof(unsigned long) < regs->sp)
                         goto bad_area;
         }
         if (expand_stack(vma, address))
@@ -442,7 +442,7 @@ good_area:
         /*
          * Did it hit the DOS screen memory VA from vm86 mode?
          */
-        if (regs->eflags & VM_MASK) {
+        if (regs->flags & VM_MASK) {
                 unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
                 if (bit < 32)
                         tsk->thread.screen_bitmap |= 1 << bit;
@@ -474,11 +474,11 @@ bad_area_nosemaphore:
 
                 if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
                     printk_ratelimit()) {
-                        printk("%s%s[%d]: segfault at %08lx eip %08lx "
-                            "esp %08lx error %lx\n",
+                        printk("%s%s[%d]: segfault at %08lx ip %08lx "
+                            "sp %08lx error %lx\n",
                             task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
-                            tsk->comm, task_pid_nr(tsk), address, regs->eip,
-                            regs->esp, error_code);
+                            tsk->comm, task_pid_nr(tsk), address, regs->ip,
+                            regs->sp, error_code);
                 }
                 tsk->thread.cr2 = address;
                 /* Kernel addresses are always protection faults */
@@ -544,7 +544,7 @@ no_context:
                         printk(KERN_ALERT "BUG: unable to handle kernel paging"
                                         " request");
                 printk(" at virtual address %08lx\n",address);
-                printk(KERN_ALERT "printing eip: %08lx ", regs->eip);
+                printk(KERN_ALERT "printing ip: %08lx ", regs->ip);
 
                 page = read_cr3();
                 page = ((__typeof__(page) *) __va(page))[address >> PGDIR_SHIFT];
diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index 0e26230669ca..88a7abda29ce 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -198,7 +198,7 @@ KERN_ERR "******* Disabling USB legacy in the BIOS may also help.\n";
 static int is_errata93(struct pt_regs *regs, unsigned long address) 
 {
         static int warned;
-        if (address != regs->rip)
+        if (address != regs->ip)
                 return 0;
         if ((address >> 32) != 0) 
                 return 0;
@@ -209,7 +209,7 @@ static int is_errata93(struct pt_regs *regs, unsigned long address)
                         printk(errata93_warning);               
                         warned = 1;
                 }
-                regs->rip = address;
+                regs->ip = address;
                 return 1;
         }
         return 0;
@@ -355,7 +355,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
         if (notify_page_fault(regs))
                 return;
 
-        if (likely(regs->eflags & X86_EFLAGS_IF))
+        if (likely(regs->flags & X86_EFLAGS_IF))
                 local_irq_enable();
 
         if (unlikely(error_code & PF_RSVD))
@@ -393,7 +393,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
          */
         if (!down_read_trylock(&mm->mmap_sem)) {
                 if ((error_code & PF_USER) == 0 &&
-                    !search_exception_tables(regs->rip))
+                    !search_exception_tables(regs->ip))
                         goto bad_area_nosemaphore;
                 down_read(&mm->mmap_sem);
         }
@@ -409,7 +409,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
                 /* Allow userspace just enough access below the stack pointer
                  * to let the 'enter' instruction work.
                  */
-                if (address + 65536 + 32 * sizeof(unsigned long) < regs->rsp)
+                if (address + 65536 + 32 * sizeof(unsigned long) < regs->sp)
                         goto bad_area;
         }
         if (expand_stack(vma, address))
@@ -488,10 +488,10 @@ bad_area_nosemaphore:
                 if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
                     printk_ratelimit()) {
                         printk(
-                       "%s%s[%d]: segfault at %lx rip %lx rsp %lx error %lx\n",
+                       "%s%s[%d]: segfault at %lx ip %lx sp %lx error %lx\n",
                                         tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
-                                        tsk->comm, tsk->pid, address, regs->rip,
-                                        regs->rsp, error_code);
+                                        tsk->comm, tsk->pid, address, regs->ip,
+                                        regs->sp, error_code);
                 }
        
                 tsk->thread.cr2 = address;
@@ -509,9 +509,9 @@ bad_area_nosemaphore:
 no_context:
         
         /* Are we prepared to handle this kernel fault?  */
-        fixup = search_exception_tables(regs->rip);
+        fixup = search_exception_tables(regs->ip);
         if (fixup) {
-                regs->rip = fixup->fixup;
+                regs->ip = fixup->fixup;
                 return;
         }
 
@@ -537,7 +537,7 @@ no_context:
         else
                 printk(KERN_ALERT "Unable to handle kernel paging request");
         printk(" at %016lx RIP: \n" KERN_ALERT,address);
-        printk_address(regs->rip);
+        printk_address(regs->ip);
         dump_pagetable(address);
         tsk->thread.cr2 = address;
         tsk->thread.trap_no = 14;
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 0ed046a187f7..cc353a0b183e 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -48,7 +48,7 @@ static struct stacktrace_ops backtrace_ops = {
 };
 
 struct frame_head {
-        struct frame_head *ebp;
+        struct frame_head *bp;
         unsigned long ret;
 } __attribute__((packed));
 
@@ -67,10 +67,10 @@ dump_user_backtrace(struct frame_head * head)
 
         /* frame pointers should strictly progress back up the stack
          * (towards higher addresses) */
-        if (head >= bufhead[0].ebp)
+        if (head >= bufhead[0].bp)
                 return NULL;
 
-        return bufhead[0].ebp;
+        return bufhead[0].bp;
 }
 
 void
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index d3574485cb15..29517faaa735 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -141,8 +141,8 @@ static void __init xen_banner(void)
         printk(KERN_INFO "Hypervisor signature: %s\n", xen_start_info->magic);
 }
 
-static void xen_cpuid(unsigned int *eax, unsigned int *ebx,
-                      unsigned int *ecx, unsigned int *edx)
+static void xen_cpuid(unsigned int *ax, unsigned int *bx,
+                      unsigned int *cx, unsigned int *dx)
 {
         unsigned maskedx = ~0;
 
@@ -150,18 +150,18 @@ static void xen_cpuid(unsigned int *eax, unsigned int *ebx,
          * Mask out inconvenient features, to try and disable as many
          * unsupported kernel subsystems as possible.
          */
-        if (*eax == 1)
+        if (*ax == 1)
                 maskedx = ~((1 << X86_FEATURE_APIC) |  /* disable APIC */
                             (1 << X86_FEATURE_ACPI) |  /* disable ACPI */
                             (1 << X86_FEATURE_ACC));   /* thermal monitoring */
 
         asm(XEN_EMULATE_PREFIX "cpuid"
-                : "=a" (*eax),
-                  "=b" (*ebx),
-                  "=c" (*ecx),
-                  "=d" (*edx)
-                : "0" (*eax), "2" (*ecx));
-        *edx &= maskedx;
+                : "=a" (*ax),
+                  "=b" (*bx),
+                  "=c" (*cx),
+                  "=d" (*dx)
+                : "0" (*ax), "2" (*cx));
+        *dx &= maskedx;
 }
 
 static void xen_set_debugreg(int reg, unsigned long val)
diff --git a/arch/x86/xen/events.c b/arch/x86/xen/events.c
index 6d1da5809e6f..aebab9704dd7 100644
--- a/arch/x86/xen/events.c
+++ b/arch/x86/xen/events.c
@@ -487,7 +487,7 @@ fastcall void xen_evtchn_do_upcall(struct pt_regs *regs)
                         int irq = evtchn_to_irq[port];
 
                         if (irq != -1) {
-                                regs->orig_eax = ~irq;
+                                regs->orig_ax = ~irq;
                                 do_IRQ(regs);
                         }
                 }