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signals: __group_complete_signal: cache the value of p->signal 

Cosmetic, cache p->signal to make the code a bit more readable.

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 00:52:49 -07:00 committed by Linus Torvalds
parent 5fc894bb4f
commit f8c5b5c06f
1 changed files with 9 additions and 8 deletions
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17
kernel/signal.c
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@ -842,6 +842,7 @@ static inline int wants_signal(int sig, struct task_struct *p)
static void
__group_complete_signal(int sig, struct task_struct *p)
{
struct signal_struct *signal = p->signal;
struct task_struct *t;
/*
@ -862,14 +863,14 @@ __group_complete_signal(int sig, struct task_struct *p)
/*
* Otherwise try to find a suitable thread.
*/
t = p->signal->curr_target;
t = signal->curr_target;
if (t == NULL)
/* restart balancing at this thread */
t = p->signal->curr_target = p;
t = signal->curr_target = p;
while (!wants_signal(sig, t)) {
t = next_thread(t);
if (t == p->signal->curr_target)
if (t == signal->curr_target)
/*
* No thread needs to be woken.
* Any eligible threads will see
@ -877,14 +878,14 @@ __group_complete_signal(int sig, struct task_struct *p)
*/
return;
}
p->signal->curr_target = t;
signal->curr_target = t;
}
/*
* Found a killable thread. If the signal will be fatal,
* then start taking the whole group down immediately.
*/
if (sig_fatal(p, sig) && !(p->signal->flags & SIGNAL_GROUP_EXIT) &&
if (sig_fatal(p, sig) && !(signal->flags & SIGNAL_GROUP_EXIT) &&
!sigismember(&t->real_blocked, sig) &&
(sig == SIGKILL || !(t->ptrace & PT_PTRACED))) {
/*
@ -897,9 +898,9 @@ __group_complete_signal(int sig, struct task_struct *p)
* running and doing things after a slower
* thread has the fatal signal pending.
*/
p->signal->flags = SIGNAL_GROUP_EXIT;
p->signal->group_exit_code = sig;
p->signal->group_stop_count = 0;
signal->flags = SIGNAL_GROUP_EXIT;
signal->group_exit_code = sig;
signal->group_stop_count = 0;
t = p;
do {
sigaddset(&t->pending.signal, SIGKILL);