[PATCH -mm 3/5][AIO] - export good_sigevent()

[Sébastien Dugué]

                      Export good_sigevent()


  Move good_sigevent() from posix-timers.c to signal.c where it belongs,
and export it so that it can be used by other subsystems.


 include/linux/signal.h |    1 +
 kernel/posix-timers.c  |   17 -----------------
 kernel/signal.c        |   23 +++++++++++++++++++++++
 3 files changed, 24 insertions(+), 17 deletions(-)

Signed-off-by: Sébastien Dugué <sebastien.dugue@xxxxxxxx>


Index: linux-2.6.19-rc6-mm2/include/linux/signal.h
===================================================================
--- linux-2.6.19-rc6-mm2.orig/include/linux/signal.h	2006-11-28
12:49:40.000000000 +0100 +++ linux-2.6.19-rc6-mm2/include/linux/signal.h
2006-11-28 12:51:43.000000000 +0100 @@ -240,6 +240,7 @@ extern int
sigprocmask(int, sigset_t *, 
 struct pt_regs;
 extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction
*return_ka, struct pt_regs *regs, void *cookie); +extern struct task_struct *
good_sigevent(sigevent_t *); 
 extern struct kmem_cache *sighand_cachep;
 
Index: linux-2.6.19-rc6-mm2/kernel/posix-timers.c
===================================================================
--- linux-2.6.19-rc6-mm2.orig/kernel/posix-timers.c	2006-11-28
12:49:40.000000000 +0100 +++ linux-2.6.19-rc6-mm2/kernel/posix-timers.c
2006-11-28 12:51:43.000000000 +0100 @@ -367,23 +367,6 @@ static enum
hrtimer_restart posix_timer_ return ret;
 }
 
-static struct task_struct * good_sigevent(sigevent_t * event)
-{
-	struct task_struct *rtn = current->group_leader;
-
-	if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
-		(!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) ||
-		 rtn->tgid != current->tgid ||
-		 (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
-		return NULL;
-
-	if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) &&
-	    ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX)))
-		return NULL;
-
-	return rtn;
-}
-
 void register_posix_clock(const clockid_t clock_id, struct k_clock *new_clock)
 {
 	if ((unsigned) clock_id >= MAX_CLOCKS) {
Index: linux-2.6.19-rc6-mm2/kernel/signal.c
===================================================================
--- linux-2.6.19-rc6-mm2.orig/kernel/signal.c	2006-11-28
12:49:40.000000000 +0100 +++ linux-2.6.19-rc6-mm2/kernel/signal.c
2006-11-28 12:51:43.000000000 +0100 @@ -1189,6 +1189,29 @@ int
group_send_sig_info(int sig, struct return ret;
 }
 
+/***
+ * good_sigevent - check and get target task from a sigevent.
+ * @event: the sigevent to be checked
+ *
+ * This function must be called with tasklist_lock held for reading.
+ */
+struct task_struct * good_sigevent(sigevent_t * event)
+{
+	struct task_struct *rtn = current->group_leader;
+
+	if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
+		(!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) ||
+		 rtn->tgid != current->tgid ||
+		 (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
+		return NULL;
+
+	if (((event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE) &&
+	    ((event->sigev_signo <= 0) || (event->sigev_signo > SIGRTMAX)))
+		return NULL;
+
+	return rtn;
+}
+
 /*
  * kill_pgrp_info() sends a signal to a process group: this is what the tty
  * control characters do (^C, ^Z etc)
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/