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authorOleg Nesterov <oleg@tv-sign.ru>2008-04-30 00:52:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:35 -0700
commit6e65acba7ca8169e38ab55d62d52f29a75fb141f (patch)
treea691ee9392b0f2ed8a434e5a5cd6e6a213b70f1b /kernel
parentc99fcf28b87d8cab592db7571e3164f5cb54c5b3 (diff)
signals: move handle_stop_signal() into send_signal()
Move handle_stop_signal() into send_signal(). This factors out a couple of callsites and allows us to do further unifications. Also, with this change specific_send_sig_info() does handle_stop_signal(). Not that this is really important, we never send STOP/CONT via send_sig() and friends, but still this looks more consistent. The only (afaics) special case is get_signal_to_deliver(). If the traced task dequeues SIGCONT, it can re-send it to itself after ptrace_stop() if the signal was blocked by debugger. In that case handle_stop_signal() is unnecessary, but hopefully not a problem. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/signal.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index db442c59219..b3dedf1f932 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -660,8 +660,10 @@ static inline int legacy_queue(struct sigpending *signals, int sig)
static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
struct sigpending *signals)
{
- struct sigqueue * q = NULL;
+ struct sigqueue *q;
+ assert_spin_locked(&t->sighand->siglock);
+ handle_stop_signal(sig, t);
/*
* Short-circuit ignored signals and support queuing
* exactly one non-rt signal, so that we can get more
@@ -766,9 +768,6 @@ specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t)
{
int ret;
- BUG_ON(!irqs_disabled());
- assert_spin_locked(&t->sighand->siglock);
-
ret = send_signal(sig, info, t, &t->pending);
if (ret <= 0)
return ret;
@@ -923,9 +922,6 @@ __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
{
int ret;
- assert_spin_locked(&p->sighand->siglock);
- handle_stop_signal(sig, p);
-
/*
* Put this signal on the shared-pending queue, or fail with EAGAIN.
* We always use the shared queue for process-wide signals,
@@ -2241,7 +2237,6 @@ static int do_tkill(int tgid, int pid, int sig)
*/
if (!error && sig && p->sighand) {
spin_lock_irq(&p->sighand->siglock);
- handle_stop_signal(sig, p);
error = specific_send_sig_info(sig, &info, p);
spin_unlock_irq(&p->sighand->siglock);
}