From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262366AbVDXTBA (ORCPT ); Sun, 24 Apr 2005 15:01:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262378AbVDXTA7 (ORCPT ); Sun, 24 Apr 2005 15:00:59 -0400 Received: from mail-relay-2.tiscali.it ([213.205.33.42]:46256 "EHLO mail-relay-2.tiscali.it") by vger.kernel.org with ESMTP id S262366AbVDXTAx (ORCPT ); Sun, 24 Apr 2005 15:00:53 -0400 Subject: [patch 6/7] uml: commentary about forking flag To: akpm@osdl.org Cc: jdike@addtoit.com, bstroesser@fujitsu-siemens.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, blaisorblade@yahoo.it From: blaisorblade@yahoo.it Date: Sun, 24 Apr 2005 20:19:22 +0200 Message-Id: <20050424181922.631D255D03@zion> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Add some commentary about UML internals, for a strange trick. Signed-off-by: Paolo 'Blaisorblade' Giarrusso --- linux-2.6.12-paolo/include/asm-um/processor-generic.h | 4 ++++ 1 files changed, 4 insertions(+) diff -puN include/asm-um/processor-generic.h~uml-commentary-about-forking-flag include/asm-um/processor-generic.h --- linux-2.6.12/include/asm-um/processor-generic.h~uml-commentary-about-forking-flag 2005-04-24 20:17:06.000000000 +0200 +++ linux-2.6.12-paolo/include/asm-um/processor-generic.h 2005-04-24 20:17:06.000000000 +0200 @@ -17,6 +17,10 @@ struct task_struct; struct mm_struct; struct thread_struct { + /* This flag is set to 1 before calling do_fork (and analyzed in + * copy_thread) to mark that we are begin called from userspace (fork / + * vfork / clone), and reset to 0 after. It is left to 0 when called + * from kernelspace (i.e. kernel_thread() or fork_idle(), as of 2.6.11). */ int forking; int nsyscalls; struct pt_regs regs; _