[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20091201221036.GA10052@darkmag.usersys.redhat.com>
Date: Tue, 1 Dec 2009 23:10:36 +0100
From: Veaceslav Falico <vfalico@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...e.de>,
Al Viro <viro@...iv.linux.org.uk>,
Miloslav Trmac <mitr@...hat.com>,
James Morris <jmorris@...ei.org>,
Alan Cox <alan@...ux.intel.com>, Ingo Molnar <mingo@...e.hu>,
Peter Zijlstra <peterz@...radead.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Balbir Singh <balbir@...ux.vnet.ibm.com>,
Alexey Dobriyan <adobriyan@...il.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
Renaud Lottiaux <renaud.lottiaux@...labs.com>,
Louis Rilling <louis.rilling@...labs.com>,
David Howells <dhowells@...hat.com>,
Oleg Nesterov <oleg@...hat.com>
Subject: [PATCH 1/4] copy_signal cleanup: use zalloc and remove
initializations
Use kmem_cache_zalloc() on signal creation and remove unneeded initialization
lines.
Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
---
diff --git a/kernel/fork.c b/kernel/fork.c
index 166b8c4..160477d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -825,17 +825,6 @@ static void posix_cpu_timers_init_group(struct signal_struct *sig)
/* Thread group counters. */
thread_group_cputime_init(sig);
- /* Expiration times and increments. */
- sig->it[CPUCLOCK_PROF].expires = cputime_zero;
- sig->it[CPUCLOCK_PROF].incr = cputime_zero;
- sig->it[CPUCLOCK_VIRT].expires = cputime_zero;
- sig->it[CPUCLOCK_VIRT].incr = cputime_zero;
-
- /* Cached expiration times. */
- sig->cputime_expires.prof_exp = cputime_zero;
- sig->cputime_expires.virt_exp = cputime_zero;
- sig->cputime_expires.sched_exp = 0;
-
if (sig->rlim[RLIMIT_CPU].rlim_cur != RLIM_INFINITY) {
sig->cputime_expires.prof_exp =
secs_to_cputime(sig->rlim[RLIMIT_CPU].rlim_cur);
@@ -855,7 +844,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
if (clone_flags & CLONE_THREAD)
return 0;
- sig = kmem_cache_alloc(signal_cachep, GFP_KERNEL);
+ sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);
tsk->signal = sig;
if (!sig)
return -ENOMEM;
@@ -863,33 +852,16 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
atomic_set(&sig->count, 1);
atomic_set(&sig->live, 1);
init_waitqueue_head(&sig->wait_chldexit);
- sig->flags = 0;
if (clone_flags & CLONE_NEWPID)
sig->flags |= SIGNAL_UNKILLABLE;
- sig->group_exit_code = 0;
- sig->group_exit_task = NULL;
- sig->group_stop_count = 0;
sig->curr_target = tsk;
init_sigpending(&sig->shared_pending);
INIT_LIST_HEAD(&sig->posix_timers);
hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
- sig->it_real_incr.tv64 = 0;
sig->real_timer.function = it_real_fn;
- sig->leader = 0; /* session leadership doesn't inherit */
- sig->tty_old_pgrp = NULL;
- sig->tty = NULL;
-
- sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
- sig->gtime = cputime_zero;
- sig->cgtime = cputime_zero;
- sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
- sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
- sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
- sig->maxrss = sig->cmaxrss = 0;
task_io_accounting_init(&sig->ioac);
- sig->sum_sched_runtime = 0;
taskstats_tgid_init(sig);
task_lock(current->group_leader);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists