Merge branch 'tracing/core' into tracing/hw-breakpoints

[deliverable/linux.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 994dd6a4a2a004bcb5d91955fb921ac8c303eb3d..1092a1a2fbe653155183ce25c754a9be8647d217 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -17,6 +17,8 @@
 #include <asm/uaccess.h>
 #include <asm/i387.h>
 #include <asm/ds.h>
+#include <asm/debugreg.h>
+#include <asm/hw_breakpoint.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -48,6 +50,8 @@ void free_thread_xstate(struct task_struct *tsk)
                kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
                tsk->thread.xstate = NULL;
        }
+       if (unlikely(test_tsk_thread_flag(tsk, TIF_DEBUG)))
+               flush_thread_hw_breakpoint(tsk);
 
        WARN(tsk->thread.ds_ctx, "leaking DS context\n");
 }
@@ -108,12 +112,8 @@ void flush_thread(void)
 
        clear_tsk_thread_flag(tsk, TIF_DEBUG);
 
-       tsk->thread.debugreg0 = 0;
-       tsk->thread.debugreg1 = 0;
-       tsk->thread.debugreg2 = 0;
-       tsk->thread.debugreg3 = 0;
-       tsk->thread.debugreg6 = 0;
-       tsk->thread.debugreg7 = 0;
+       if (unlikely(test_tsk_thread_flag(tsk, TIF_DEBUG)))
+               flush_thread_hw_breakpoint(tsk);
        memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
        /*
         * Forget coprocessor state..
@@ -195,16 +195,6 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
        else if (next->debugctlmsr != prev->debugctlmsr)
                update_debugctlmsr(next->debugctlmsr);
 
-       if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
-               set_debugreg(next->debugreg0, 0);
-               set_debugreg(next->debugreg1, 1);
-               set_debugreg(next->debugreg2, 2);
-               set_debugreg(next->debugreg3, 3);
-               /* no 4 and 5 */
-               set_debugreg(next->debugreg6, 6);
-               set_debugreg(next->debugreg7, 7);
-       }
-
        if (test_tsk_thread_flag(prev_p, TIF_NOTSC) ^
            test_tsk_thread_flag(next_p, TIF_NOTSC)) {
                /* prev and next are different */
@@ -519,16 +509,12 @@ static void c1e_idle(void)
                if (!cpumask_test_cpu(cpu, c1e_mask)) {
                        cpumask_set_cpu(cpu, c1e_mask);
                        /*
-                        * Force broadcast so ACPI can not interfere. Needs
-                        * to run with interrupts enabled as it uses
-                        * smp_function_call.
+                        * Force broadcast so ACPI can not interfere.
                         */
-                       local_irq_enable();
                        clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
                                           &cpu);
                        printk(KERN_INFO "Switch to broadcast mode on CPU%d\n",
                               cpu);
-                       local_irq_disable();
                }
                clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);