Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

[pandora-kernel.git] / arch / x86_64 / kernel / traps.c

diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 3dfec8f..6ead433 100644 (file)
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -274,7 +274,7 @@ EXPORT_SYMBOL(dump_stack);
 void show_registers(struct pt_regs *regs)
 {
        int i;
-       int in_kernel = (regs->cs & 3) == 0;
+       int in_kernel = !user_mode(regs);
        unsigned long rsp;
        const int cpu = safe_smp_processor_id(); 
        struct task_struct *cur = cpu_pda[cpu].pcurrent; 
@@ -318,7 +318,7 @@ void handle_BUG(struct pt_regs *regs)
        struct bug_frame f;
        char tmp;
 
-       if (regs->cs & 3)
+       if (user_mode(regs))
                return; 
        if (__copy_from_user(&f, (struct bug_frame *) regs->rip, 
                             sizeof(struct bug_frame)))
@@ -437,7 +437,7 @@ static void do_trap(int trapnr, int signr, char *str,
        }
 #endif
 
-       if ((regs->cs & 3)  != 0) { 
+       if (user_mode(regs)) {
                struct task_struct *tsk = current;
 
                if (exception_trace && unhandled_signal(tsk, signr))
@@ -522,7 +522,7 @@ asmlinkage void do_general_protection(struct pt_regs * regs, long error_code)
        }
 #endif
 
-       if ((regs->cs & 3)!=0) { 
+       if (user_mode(regs)) {
                struct task_struct *tsk = current;
 
                if (exception_trace && unhandled_signal(tsk, SIGSEGV))
@@ -586,9 +586,12 @@ static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
 asmlinkage void default_do_nmi(struct pt_regs *regs)
 {
        unsigned char reason = 0;
+       int cpu;
+
+       cpu = smp_processor_id();
 
        /* Only the BSP gets external NMIs from the system.  */
-       if (!smp_processor_id())
+       if (!cpu)
                reason = get_nmi_reason();
 
        if (!(reason & 0xc0)) {
@@ -638,7 +641,7 @@ asmlinkage struct pt_regs *sync_regs(struct pt_regs *eregs)
        if (eregs == (struct pt_regs *)eregs->rsp)
                ;
        /* Exception from user space */
-       else if (eregs->cs & 3)
+       else if (user_mode(eregs))
                regs = ((struct pt_regs *)current->thread.rsp0) - 1;
        /* Exception from kernel and interrupts are enabled. Move to
           kernel process stack. */
@@ -669,7 +672,7 @@ asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
        }
 #endif
 
-       asm("movq %%db6,%0" : "=r" (condition));
+       get_debugreg(condition, 6);
 
        if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
                                                SIGTRAP) == NOTIFY_STOP)
@@ -697,7 +700,7 @@ asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
                 * allowing programs to debug themselves without the ptrace()
                 * interface.
                 */
-                if ((regs->cs & 3) == 0)
+                if (!user_mode(regs))
                        goto clear_TF_reenable;
                /*
                 * Was the TF flag set by a debugger? If so, clear it now,
@@ -715,13 +718,13 @@ asmlinkage void do_debug(struct pt_regs * regs, unsigned long error_code)
        info.si_signo = SIGTRAP;
        info.si_errno = 0;
        info.si_code = TRAP_BRKPT;
-       if ((regs->cs & 3) == 0) 
+       if (!user_mode(regs))
                goto clear_dr7; 
 
        info.si_addr = (void __user *)regs->rip;
        force_sig_info(SIGTRAP, &info, tsk);    
 clear_dr7:
-       asm volatile("movq %0,%%db7"::"r"(0UL));
+       set_debugreg(0UL, 7);
        return;
 
 clear_TF_reenable:
@@ -756,7 +759,7 @@ asmlinkage void do_coprocessor_error(struct pt_regs *regs)
        unsigned short cwd, swd;
 
        conditional_sti(regs);
-       if ((regs->cs & 3) == 0 &&
+       if (!user_mode(regs) &&
            kernel_math_error(regs, "kernel x87 math error"))
                return;
 
@@ -822,7 +825,7 @@ asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
        unsigned short mxcsr;
 
        conditional_sti(regs);
-       if ((regs->cs & 3) == 0 &&
+       if (!user_mode(regs) &&
                kernel_math_error(regs, "kernel simd math error"))
                return;