From 47918025efdabd34e96b13b26eb2cf2fd6fd1f7c Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Wed, 17 Jun 2009 16:27:39 -0700
Subject: [PATCH] shift "ptrace implies WUNTRACED" from ptrace_do_wait() to
wait_task_stopped()
No functional changes, preparation for the next patch.
ptrace_do_wait() adds WUNTRACED to options for wait_task_stopped() which
should always accept the stopped tracee, even if do_wait() was called
without WUNTRACED.
Change wait_task_stopped() to check "ptrace || WUNTRACED" instead. This
makes the code more explicit, and "int options" argument becomes const in
do_wait() pathes.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
kernel/exit.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/kernel/exit.c b/kernel/exit.c
index 94a9992e6fd9..fd781b56401d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1330,7 +1330,10 @@ static int wait_task_stopped(int ptrace, struct task_struct *p,
uid_t uid = 0; /* unneeded, required by compiler */
pid_t pid;
- if (!(options & WUNTRACED))
+ /*
+ * Traditionally we see ptrace'd stopped tasks regardless of options.
+ */
+ if (!ptrace && !(options & WUNTRACED))
return 0;
exit_code = 0;
@@ -1548,11 +1551,6 @@ static int ptrace_do_wait(struct task_struct *tsk, int *notask_error,
{
struct task_struct *p;
- /*
- * Traditionally we see ptrace'd stopped tasks regardless of options.
- */
- options |= WUNTRACED;
-
list_for_each_entry(p, &tsk->ptraced, ptrace_entry) {
int ret = wait_consider_task(tsk, 1, p, notask_error,
type, pid, options,
--
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