linux-kernel - [PATCH] copy_process: remove the unneeded clear_tsk_thread_flag(TIF

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Message-ID: <20090427194845.GA6245@redhat.com>
Date:	Mon, 27 Apr 2009 21:48:45 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Roland McGrath <roland@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] copy_process: remove the unneeded
	clear_tsk_thread_flag(TIF_SIGPENDING)

The forked child can have TIF_SIGPENDING if it was copied from parent's
ti->flags. But this is harmless and actually almost never happens, because
copy_process() can't succeed if signal_pending() == T.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>

--- PTRACE/kernel/fork.c~FORK_SIGPENDING	2009-04-13 17:05:52.000000000 +0200
+++ PTRACE/kernel/fork.c	2009-04-27 21:38:57.000000000 +0200
@@ -1027,7 +1027,6 @@ static struct task_struct *copy_process(
 	p->vfork_done = NULL;
 	spin_lock_init(&p->alloc_lock);
 
-	clear_tsk_thread_flag(p, TIF_SIGPENDING);
 	init_sigpending(&p->pending);
 
 	p->utime = cputime_zero;

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