From: Oleg Nesterov Date: Wed, 17 Jun 2009 23:27:39 +0000 (-0700) Subject: shift "ptrace implies WUNTRACED" from ptrace_do_wait() to wait_task_stopped() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=47918025efdabd34e96b13b26eb2cf2fd6fd1f7c;p=openwrt%2Fstaging%2Fblogic.git 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 Acked-by: Roland McGrath Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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,