The patch titled
signals: collect_signal: simplify the "still_pending" logic
has been added to the -mm tree. Its filename is
signals-collect_signal-simplify-the-still_pending-logic.patch
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------------------------------------------------------
Subject: signals: collect_signal: simplify the "still_pending" logic
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Factor out sigdelset() calls and remove the "still_pending" variable.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff -puN kernel/signal.c~signals-collect_signal-simplify-the-still_pending-logic kernel/signal.c
--- a/kernel/signal.c~signals-collect_signal-simplify-the-still_pending-logic
+++ a/kernel/signal.c
@@ -307,7 +307,6 @@ unblock_all_signals(void)
static int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
{
struct sigqueue *q, *first = NULL;
- int still_pending = 0;
/*
* Collect the siginfo appropriate to this signal. Check if
@@ -315,16 +314,16 @@ static int collect_signal(int sig, struc
*/
list_for_each_entry(q, &list->list, list) {
if (q->info.si_signo == sig) {
- if (first) {
- still_pending = 1;
- break;
- }
+ if (first)
+ goto still_pending;
first = q;
}
}
+
+ sigdelset(&list->signal, sig);
+
if (first) {
- if (!still_pending)
- sigdelset(&list->signal, sig);
+still_pending:
if (unlikely(first->flags & SIGQUEUE_CANCELLED))
sig = 0;
copy_siginfo(info, &first->info);
@@ -336,7 +335,6 @@ static int collect_signal(int sig, struc
a fast-pathed signal or we must have been
out of queue space. So zero out the info.
*/
- sigdelset(&list->signal, sig);
info->si_signo = sig;
info->si_errno = 0;
info->si_code = 0;
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
signals-fix-sigqueue_free-vs-__exit_signal-race.patch
posix-timers-timer_delete-remove-the-bogus-it_process-=-null-check.patch
posix-timers-release_posix_timer-kill-the-bogus-put_task_struct-it_process.patch
signals-sigqueue_free-dont-free-sigqueue-if-it-is-queued.patch
signals-introduce-sigqueue_cancelled.patch
posix-timers-use-sigqueue_cancelled-when-the-timer-is-destroyed.patch
signals-collect_signal-remove-the-unneeded-sigismember-check.patch
signals-collect_signal-simplify-the-still_pending-logic.patch
put_pid-make-sure-we-dont-free-the-live-pid.patch
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