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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>
This commit is contained in:
Oleg Nesterov 2008-04-30 00:52:50 -07:00 committed by Linus Torvalds
parent c99fcf28b8
commit 6e65acba7c
1 changed files with 3 additions and 8 deletions
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11
kernel/signal.c
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@ -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);
}