1 files changed, 98 insertions, 52 deletions

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index c34d1bfc5161..0aaebf3e1cfa 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -112,33 +112,38 @@ static inline int valid_stack_ptr(struct thread_info *tinfo, void *p)
                 p < (void *)tinfo + THREAD_SIZE - 3;
 }
 
+static void print_addr_and_symbol(unsigned long addr, char *log_lvl)
+{
+        printk(log_lvl);
+        printk(" [<%08lx>] ", addr);
+        print_symbol("%s", addr);
+        printk("\n");
+}
+
 static inline unsigned long print_context_stack(struct thread_info *tinfo,
-                                unsigned long *stack, unsigned long ebp)
+                                unsigned long *stack, unsigned long ebp,
+                                char *log_lvl)
 {
         unsigned long addr;
 
 #ifdef  CONFIG_FRAME_POINTER
         while (valid_stack_ptr(tinfo, (void *)ebp)) {
                 addr = *(unsigned long *)(ebp + 4);
-                printk(" [<%08lx>] ", addr);
-                print_symbol("%s", addr);
-                printk("\n");
+                print_addr_and_symbol(addr, log_lvl);
                 ebp = *(unsigned long *)ebp;
         }
 #else
         while (valid_stack_ptr(tinfo, stack)) {
                 addr = *stack++;
-                if (__kernel_text_address(addr)) {
-                        printk(" [<%08lx>]", addr);
-                        print_symbol(" %s", addr);
-                        printk("\n");
-                }
+                if (__kernel_text_address(addr))
+                        print_addr_and_symbol(addr, log_lvl);
         }
 #endif
         return ebp;
 }
 
-void show_trace(struct task_struct *task, unsigned long * stack)
+static void show_trace_log_lvl(struct task_struct *task,
+                               unsigned long *stack, char *log_lvl)
 {
         unsigned long ebp;
 
@@ -157,15 +162,21 @@ void show_trace(struct task_struct *task, unsigned long * stack)
                 struct thread_info *context;
                 context = (struct thread_info *)
                         ((unsigned long)stack & (~(THREAD_SIZE - 1)));
-                ebp = print_context_stack(context, stack, ebp);
+                ebp = print_context_stack(context, stack, ebp, log_lvl);
                 stack = (unsigned long*)context->previous_esp;
                 if (!stack)
                         break;
-                printk(" =======================\n");
+                printk(KERN_EMERG " =======================\n");
         }
 }
 
-void show_stack(struct task_struct *task, unsigned long *esp)
+void show_trace(struct task_struct *task, unsigned long * stack)
+{
+        show_trace_log_lvl(task, stack, "");
+}
+
+static void show_stack_log_lvl(struct task_struct *task, unsigned long *esp,
+                               char *log_lvl)
 {
         unsigned long *stack;
         int i;
@@ -178,15 +189,26 @@ void show_stack(struct task_struct *task, unsigned long *esp)
         }
 
         stack = esp;
+        printk(log_lvl);
         for(i = 0; i < kstack_depth_to_print; i++) {
                 if (kstack_end(stack))
                         break;
-                if (i && ((i % 8) == 0))
-                        printk("\n       ");
+                if (i && ((i % 8) == 0)) {
+                        printk("\n");
+                        printk(log_lvl);
+                        printk("       ");
+                }
                 printk("%08lx ", *stack++);
         }
-        printk("\nCall Trace:\n");
-        show_trace(task, esp);
+        printk("\n");
+        printk(log_lvl);
+        printk("Call Trace:\n");
+        show_trace_log_lvl(task, esp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *esp)
+{
+        show_stack_log_lvl(task, esp, "");
 }
 
 /*
@@ -216,18 +238,18 @@ void show_registers(struct pt_regs *regs)
                 ss = regs->xss & 0xffff;
         }
         print_modules();
-        printk("CPU:    %d\nEIP:    %04x:[<%08lx>]    %s VLI\nEFLAGS: %08lx"
-                        "   (%s) \n",
+        printk(KERN_EMERG "CPU:    %d\nEIP:    %04x:[<%08lx>]    %s VLI\n"
+                        "EFLAGS: %08lx   (%s) \n",
                 smp_processor_id(), 0xffff & regs->xcs, regs->eip,
                 print_tainted(), regs->eflags, system_utsname.release);
-        print_symbol("EIP is at %s\n", regs->eip);
-        printk("eax: %08lx   ebx: %08lx   ecx: %08lx   edx: %08lx\n",
+        print_symbol(KERN_EMERG "EIP is at %s\n", regs->eip);
+        printk(KERN_EMERG "eax: %08lx   ebx: %08lx   ecx: %08lx   edx: %08lx\n",
                 regs->eax, regs->ebx, regs->ecx, regs->edx);
-        printk("esi: %08lx   edi: %08lx   ebp: %08lx   esp: %08lx\n",
+        printk(KERN_EMERG "esi: %08lx   edi: %08lx   ebp: %08lx   esp: %08lx\n",
                 regs->esi, regs->edi, regs->ebp, esp);
-        printk("ds: %04x   es: %04x   ss: %04x\n",
+        printk(KERN_EMERG "ds: %04x   es: %04x   ss: %04x\n",
                 regs->xds & 0xffff, regs->xes & 0xffff, ss);
-        printk("Process %s (pid: %d, threadinfo=%p task=%p)",
+        printk(KERN_EMERG "Process %s (pid: %d, threadinfo=%p task=%p)",
                 current->comm, current->pid, current_thread_info(), current);
         /*
          * When in-kernel, we also print out the stack and code at the
@@ -236,10 +258,10 @@ void show_registers(struct pt_regs *regs)
         if (in_kernel) {
                 u8 __user *eip;
 
-                printk("\nStack: ");
-                show_stack(NULL, (unsigned long*)esp);
+                printk("\n" KERN_EMERG "Stack: ");
+                show_stack_log_lvl(NULL, (unsigned long *)esp, KERN_EMERG);
 
-                printk("Code: ");
+                printk(KERN_EMERG "Code: ");
 
                 eip = (u8 __user *)regs->eip - 43;
                 for (i = 0; i < 64; i++, eip++) {
@@ -280,15 +302,15 @@ static void handle_BUG(struct pt_regs *regs)
                 (unsigned long)file < PAGE_OFFSET || __get_user(c, file))
                 file = "<bad filename>";
 
-        printk("------------[ cut here ]------------\n");
-        printk(KERN_ALERT "kernel BUG at %s:%d!\n", file, line);
+        printk(KERN_EMERG "------------[ cut here ]------------\n");
+        printk(KERN_EMERG "kernel BUG at %s:%d!\n", file, line);
 
 no_bug:
         return;
 
         /* Here we know it was a BUG but file-n-line is unavailable */
 bug:
-        printk("Kernel BUG\n");
+        printk(KERN_EMERG "Kernel BUG\n");
 }
 
 /* This is gone through when something in the kernel
@@ -306,28 +328,35 @@ void die(const char * str, struct pt_regs * regs, long err)
                 .lock_owner_depth =     0
         };
         static int die_counter;
+        unsigned long flags;
 
         if (die.lock_owner != raw_smp_processor_id()) {
                 console_verbose();
-                spin_lock_irq(&die.lock);
+                spin_lock_irqsave(&die.lock, flags);
                 die.lock_owner = smp_processor_id();
                 die.lock_owner_depth = 0;
                 bust_spinlocks(1);
         }
+        else
+                local_save_flags(flags);
 
         if (++die.lock_owner_depth < 3) {
                 int nl = 0;
                 handle_BUG(regs);
-                printk(KERN_ALERT "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
+                printk(KERN_EMERG "%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
 #ifdef CONFIG_PREEMPT
-                printk("PREEMPT ");
+                printk(KERN_EMERG "PREEMPT ");
                 nl = 1;
 #endif
 #ifdef CONFIG_SMP
+                if (!nl)
+                        printk(KERN_EMERG);
                 printk("SMP ");
                 nl = 1;
 #endif
 #ifdef CONFIG_DEBUG_PAGEALLOC
+                if (!nl)
+                        printk(KERN_EMERG);
                 printk("DEBUG_PAGEALLOC");
                 nl = 1;
 #endif
@@ -336,11 +365,11 @@ void die(const char * str, struct pt_regs * regs, long err)
         notify_die(DIE_OOPS, (char *)str, regs, err, 255, SIGSEGV);
                 show_registers(regs);
         } else
-                printk(KERN_ERR "Recursive die() failure, output suppressed\n");
+                printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
 
         bust_spinlocks(0);
         die.lock_owner = -1;
-        spin_unlock_irq(&die.lock);
+        spin_unlock_irqrestore(&die.lock, flags);
 
         if (kexec_should_crash(current))
                 crash_kexec(regs);
@@ -452,7 +481,7 @@ 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 operand", invalid_op, ILL_ILLOPN, regs->eip)
+DO_ERROR_INFO( 6, SIGILL,  "invalid opcode", invalid_op, ILL_ILLOPN, regs->eip)
 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)
@@ -524,8 +553,10 @@ gp_in_kernel:
 
 static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
 {
-        printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
-        printk("You probably have a hardware problem with your RAM chips\n");
+        printk(KERN_EMERG "Uhhuh. NMI received. Dazed and confused, but trying "
+                        "to continue\n");
+        printk(KERN_EMERG "You probably have a hardware problem with your RAM "
+                        "chips\n");
 
         /* Clear and disable the memory parity error line. */
         clear_mem_error(reason);
@@ -535,7 +566,7 @@ static void io_check_error(unsigned char reason, struct pt_regs * regs)
 {
         unsigned long i;
 
-        printk("NMI: IOCK error (debug interrupt?)\n");
+        printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
         show_registers(regs);
 
         /* Re-enable the IOCK line, wait for a few seconds */
@@ -577,11 +608,11 @@ void die_nmi (struct pt_regs *regs, const char *msg)
         * to get a message out.
         */
         bust_spinlocks(1);
-        printk(msg);
+        printk(KERN_EMERG "%s", msg);
         printk(" on CPU%d, eip %08lx, registers:\n",
                 smp_processor_id(), regs->eip);
         show_registers(regs);
-        printk("console shuts up ...\n");
+        printk(KERN_EMERG "console shuts up ...\n");
         console_silent();
         spin_unlock(&nmi_print_lock);
         bust_spinlocks(0);
@@ -650,13 +681,6 @@ fastcall void do_nmi(struct pt_regs * regs, long error_code)
 
         cpu = smp_processor_id();
 
-#ifdef CONFIG_HOTPLUG_CPU
-        if (!cpu_online(cpu)) {
-                nmi_exit();
-                return;
-        }
-#endif
-
         ++nmi_count(cpu);
 
         if (!rcu_dereference(nmi_callback)(regs, cpu))
@@ -994,8 +1018,8 @@ asmlinkage void math_state_restore(struct pt_regs regs)
 
 asmlinkage void math_emulate(long arg)
 {
-        printk("math-emulation not enabled and no coprocessor found.\n");
-        printk("killing %s.\n",current->comm);
+        printk(KERN_EMERG "math-emulation not enabled and no coprocessor found.\n");
+        printk(KERN_EMERG "killing %s.\n",current->comm);
         force_sig(SIGFPE,current);
         schedule();
 }
@@ -1082,9 +1106,9 @@ void __init trap_init(void)
         set_trap_gate(0,&divide_error);
         set_intr_gate(1,&debug);
         set_intr_gate(2,&nmi);
-        set_system_intr_gate(3, &int3); /* int3-5 can be called from all */
+        set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
         set_system_gate(4,&overflow);
-        set_system_gate(5,&bounds);
+        set_trap_gate(5,&bounds);
         set_trap_gate(6,&invalid_op);
         set_trap_gate(7,&device_not_available);
         set_task_gate(8,GDT_ENTRY_DOUBLEFAULT_TSS);
@@ -1102,6 +1126,28 @@ void __init trap_init(void)
 #endif
         set_trap_gate(19,&simd_coprocessor_error);
 
+        if (cpu_has_fxsr) {
+                /*
+                 * Verify that the FXSAVE/FXRSTOR data will be 16-byte aligned.
+                 * Generates a compile-time "error: zero width for bit-field" if
+                 * the alignment is wrong.
+                 */
+                struct fxsrAlignAssert {
+                        int _:!(offsetof(struct task_struct,
+                                        thread.i387.fxsave) & 15);
+                };
+
+                printk(KERN_INFO "Enabling fast FPU save and restore... ");
+                set_in_cr4(X86_CR4_OSFXSR);
+                printk("done.\n");
+        }
+        if (cpu_has_xmm) {
+                printk(KERN_INFO "Enabling unmasked SIMD FPU exception "
+                                "support... ");
+                set_in_cr4(X86_CR4_OSXMMEXCPT);
+                printk("done.\n");
+        }
+
         set_system_gate(SYSCALL_VECTOR,&system_call);
 
         /*