ptrace_disable() is called when the tracee is quiescent and we
are going to untrace. This means we are going to clear ->ptrace
and wake up the tracee. Now that ptrace_stop() checks PT_ bits
and does user_disable_single_step() we can remove this code from
ptrace_disable(), it is unneeded and not utrace-friendly.
TODO: change !x86 code.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
---
arch/x86/kernel/ptrace.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 7ab475f..f1cdc7d 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -807,8 +807,6 @@ static int ioperm_get(struct task_struct *target,
*/
void ptrace_disable(struct task_struct *child)
{
- child->ptrace &= ~(PT_SINGLE_STEP | PT_SINGLE_BLOCK);
- user_disable_single_step(child);
#ifdef TIF_SYSCALL_EMU
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
#endif
--
1.5.5.1
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