diff options
| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-04-30 00:52:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:35 -0700 |
| commit | 6e65acba7ca8169e38ab55d62d52f29a75fb141f (patch) | |
| tree | a691ee9392b0f2ed8a434e5a5cd6e6a213b70f1b /kernel/signal.c | |
| parent | c99fcf28b87d8cab592db7571e3164f5cb54c5b3 (diff) | |
| download | lwn-6e65acba7ca8169e38ab55d62d52f29a75fb141f.tar.gz lwn-6e65acba7ca8169e38ab55d62d52f29a75fb141f.zip | |
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/signal.c')
| -rw-r--r-- | kernel/signal.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index db442c59219e..b3dedf1f9323 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); } |