summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/step.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/step.c')
-rw-r--r--arch/x86/kernel/step.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/x86/kernel/step.c b/arch/x86/kernel/step.c
index 6732272e3479..243bff650ca5 100644
--- a/arch/x86/kernel/step.c
+++ b/arch/x86/kernel/step.c
@@ -135,7 +135,7 @@ void user_enable_single_step(struct task_struct *child)
if (is_setting_trap_flag(child, regs))
return;
- child->ptrace |= PT_DTRACE;
+ set_tsk_thread_flag(child, TIF_FORCED_TF);
}
void user_disable_single_step(struct task_struct *child)
@@ -144,9 +144,6 @@ void user_disable_single_step(struct task_struct *child)
clear_tsk_thread_flag(child, TIF_SINGLESTEP);
/* But touch TF only if it was set by us.. */
- if (child->ptrace & PT_DTRACE) {
- struct pt_regs *regs = task_pt_regs(child);
- regs->eflags &= ~X86_EFLAGS_TF;
- child->ptrace &= ~PT_DTRACE;
- }
+ if (test_and_clear_tsk_thread_flag(child, TIF_FORCED_TF))
+ task_pt_regs(child)->eflags &= ~X86_EFLAGS_TF;
}