1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index f7356e5517f6..ae5eca17aa3c 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -555,6 +555,9 @@ static inline void __switch_to_xtra(struct task_struct *prev_p,
         prev = &prev_p->thread,
         next = &next_p->thread;
 
+        if (next->debugctlmsr != prev->debugctlmsr)
+                wrmsrl(MSR_IA32_DEBUGCTLMSR, next->debugctlmsr);
+
         if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
                 loaddebug(next, 0);
                 loaddebug(next, 1);