2008-03-05 22:43:58

by Oleg Nesterov

Subject: [PATCH 1/2] __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 <[email protected]>

--- 25/kernel/signal.c~3_GCS_CLEANUP 2008-03-06 00:43:50.000000000 +0300
+++ 25/kernel/signal.c 2008-03-06 01:07:55.000000000 +0300
@@ -842,6 +842,7 @@ static inline int wants_signal(int sig,
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
/*
* 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
*/
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
* 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);

2008-03-06 11:11:23

by Roland McGrath

Subject: Re: [PATCH 1/2] __group_complete_signal: cache the value of p->signal

Looks perfectly fine, fully cosmetic.


Thanks,
Roland