linux-kernel - [PATCH v2 2/4] copy_signal cleanup: clean acct_init_pacct() and taskstats_tgid

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Message-ID: <20091204142901.GI10052@darkmag.usersys.redhat.com>
Date:	Fri, 4 Dec 2009 15:29:01 +0100
From:	Veaceslav Falico <vfalico@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	linux-kernel@...r.kernel.org, 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>,
	Stanislaw Gruszka <sgruszka@...hat.com>
Subject: [PATCH v2 2/4] copy_signal cleanup: clean acct_init_pacct() and
	taskstats_tgid_init()

Remove unneeded initializations in acct_init_pacct() and taskstats_tgid_init().
These are accessed only via copy_signal() and are useless after using
kmem_cache_zalloc() in copy_signal().

Signed-off-by: Veaceslav Falico <vfalico@...hat.com>
---

diff --git a/include/linux/taskstats_kern.h b/include/linux/taskstats_kern.h
index 3398f45..d66167a 100644
--- a/include/linux/taskstats_kern.h
+++ b/include/linux/taskstats_kern.h
@@ -16,7 +16,6 @@ extern struct mutex taskstats_exit_mutex;
 
 static inline void taskstats_tgid_init(struct signal_struct *sig)
 {
-	sig->stats = NULL;
 }
 
 static inline void taskstats_tgid_free(struct signal_struct *sig)
diff --git a/kernel/acct.c b/kernel/acct.c
index 9a4715a..8909c26 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -592,8 +592,6 @@ out:
  */
 void acct_init_pacct(struct pacct_struct *pacct)
 {
-	memset(pacct, 0, sizeof(struct pacct_struct));
-	pacct->ac_utime = pacct->ac_stime = cputime_zero;
 }
 
 /**
--
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