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shift "ptrace implies WUNTRACED" from ptrace_do_wait() to wait_task_stopped()

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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>
This commit is contained in:
Oleg Nesterov 2009-06-17 16:27:39 -07:00 committed by Linus Torvalds
parent 3b34fc5880
commit 47918025ef
1 changed files with 4 additions and 6 deletions
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10
kernel/exit.c
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@ -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,