diff options
Diffstat (limited to 'kernel/arch/arm64/kernel/debug-monitors.c')
| -rw-r--r-- | kernel/arch/arm64/kernel/debug-monitors.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/arch/arm64/kernel/debug-monitors.c b/kernel/arch/arm64/kernel/debug-monitors.c index c1492ba1f..c8875b64b 100644 --- a/kernel/arch/arm64/kernel/debug-monitors.c +++ b/kernel/arch/arm64/kernel/debug-monitors.c @@ -152,7 +152,6 @@ static int debug_monitors_init(void) /* Clear the OS lock. */ on_each_cpu(clear_os_lock, NULL, 1); isb(); - local_dbg_enable(); /* Register hotplug handler. */ __register_cpu_notifier(&os_lock_nb); @@ -423,8 +422,10 @@ int kernel_active_single_step(void) /* ptrace API */ void user_enable_single_step(struct task_struct *task) { - set_ti_thread_flag(task_thread_info(task), TIF_SINGLESTEP); - set_regs_spsr_ss(task_pt_regs(task)); + struct thread_info *ti = task_thread_info(task); + + if (!test_and_set_ti_thread_flag(ti, TIF_SINGLESTEP)) + set_regs_spsr_ss(task_pt_regs(task)); } void user_disable_single_step(struct task_struct *task) |