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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Chen Liqin <liqin.chen@sunplusct.com>,
	Chris Metcalf <cmetcalf@tilera.com>,
	Chris Zankel <chris@zankel.net>,
	David Howells <dhowells@redhat.com>,
	"David S. Miller" <davem@davemloft.net>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Guan Xuetao <gxt@mprc.pku.edu.cn>,
	Haavard Skinnemoen <hskinnemoen@gmail.com>,
	Hirokazu Takata <takata@linux-m32r.org>,
	"James E.J. Bottomley" <jejb@parisc-linux.org>,
	Jesper Nilsson <jesper.nilsson@axis.com>,
	Jonas Bonn <jonas@southpole.se>, Mark Salter <msalter@redhat.com>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Matt Turner <mattst88@gmail.com>, Michal Simek <monstr@monstr.eu>,
	Mike Frysinger <vapier@gentoo.org>,
	Paul Mundt <lethal@linux-sh.org>,
	Ralf Baechle <ralf@linux-mips.org>,
	Richard Kuo <rkuo@codeaurora.org>,
	Richard Weinberger <richard@nod.at>,
	Russell King <linux@arm.linux.org.uk>,
	x86@kernel.org, Yoshinori Sato <ysato@users.sourceforge.jp>
Subject: [patch V2 04/31] init_task: Create generic init_task instance
Date: Thu, 03 May 2012 09:02:48 -0000
Message-ID: <20120503085034.092585287@linutronix.de> (raw)
In-Reply-To: <20120503083859.991965503@linutronix.de>

[-- Attachment #0: init-task-move-common-code-to-core.patch --]
[-- Type: text/plain, Size: 3537 bytes --]

All archs define init_task in the same way (except ia64, but there is
no particular reason why ia64 cannot use the common version). Create a
generic instance so all archs can be converted over.

The config switch is temporary and will be removed when all archs are
converted over.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Howells <dhowells@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: x86@kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 arch/Kconfig          |    3 +++
 init/Makefile         |    1 +
 init/init_task.c      |   24 ++++++++++++++++++++++++
 kernel/sched/Makefile |    2 --
 4 files changed, 28 insertions(+), 2 deletions(-)

Index: tip/arch/Kconfig
===================================================================
--- tip.orig/arch/Kconfig
+++ tip/arch/Kconfig
@@ -148,6 +148,9 @@ config USE_GENERIC_SMP_HELPERS
 config GENERIC_SMP_IDLE_THREAD
        bool
 
+config HAVE_GENERIC_INIT_TASK
+       bool
+
 config HAVE_REGS_AND_STACK_ACCESS_API
 	bool
 	help
Index: tip/init/Makefile
===================================================================
--- tip.orig/init/Makefile
+++ tip/init/Makefile
@@ -9,6 +9,7 @@ else
 obj-$(CONFIG_BLK_DEV_INITRD)   += initramfs.o
 endif
 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
+obj-$(CONFIG_HAVE_GENERIC_INIT_TASK) += init_task.o
 
 mounts-y			:= do_mounts.o
 mounts-$(CONFIG_BLK_DEV_RAM)	+= do_mounts_rd.o
Index: tip/init/init_task.c
===================================================================
--- /dev/null
+++ tip/init/init_task.c
@@ -0,0 +1,24 @@
+#include <linux/init_task.h>
+#include <linux/module.h>
+#include <linux/mqueue.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+
+#include <asm/pgtable.h>
+#include <asm/uaccess.h>
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+
+/* Initial task structure */
+struct task_struct init_task = INIT_TASK(init_task);
+EXPORT_SYMBOL(init_task);
+
+/*
+ * Initial thread structure. Alignment of this is handled by a special
+ * linker map entry.
+ */
+union thread_union init_thread_union __init_task_data =
+	{ INIT_THREAD_INFO(init_task) };
Index: tip/kernel/sched/Makefile
===================================================================
--- tip.orig/kernel/sched/Makefile
+++ tip/kernel/sched/Makefile
@@ -16,5 +16,3 @@ obj-$(CONFIG_SMP) += cpupri.o
 obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o
 obj-$(CONFIG_SCHEDSTATS) += stats.o
 obj-$(CONFIG_SCHED_DEBUG) += debug.o
-
-



  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-03  9:02 [patch V2 00/31] init_task: Use a generic init_task variant Thomas Gleixner
2012-05-03  9:02 ` [patch V2 01/31] frv: Use correct size for task_struct allocation Thomas Gleixner
2012-05-05 18:46   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 02/31] frv: Use core allocator for task_struct Thomas Gleixner
2012-05-05 18:47   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 03/31] task_allocator: Use config switches instead of magic defines Thomas Gleixner
2012-05-03  9:02 ` Thomas Gleixner [this message]
2012-05-05 18:49   ` [tip:smp/hotplug] init_task: Create generic init_task instance tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 05/31] alpha: Use generic init_task Thomas Gleixner
2012-05-05 18:50   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 06/31] arm: " Thomas Gleixner
2012-05-05 18:51   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 07/31] avr32: " Thomas Gleixner
2012-05-05 18:51   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 08/31] blackfin: " Thomas Gleixner
2012-05-05 18:52   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 10/31] cris: " Thomas Gleixner
2012-05-05 18:54   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 09/31] cx6: " Thomas Gleixner
2012-05-03 13:45   ` Mark Salter
2012-05-03 15:25     ` Thomas Gleixner
2012-05-05 18:53   ` [tip:smp/hotplug] c6x: " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 11/31] frv: " Thomas Gleixner
2012-05-05 18:55   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 12/31] h8300: " Thomas Gleixner
2012-05-05 18:56   ` [tip:smp/hotplug] h8300-use-generic-init_task tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 14/31] m32r: Use generic init_task Thomas Gleixner
2012-05-05 18:57   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 13/31] hexagon: Use generic idle_task Thomas Gleixner
2012-05-05 18:56   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 15/31] m68k: Use generic init_task Thomas Gleixner
2012-05-05 18:58   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 16/31] microblaze: " Thomas Gleixner
2012-05-05 18:59   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 17/31] mips: " Thomas Gleixner
2012-05-05 19:00   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 19/31] openrisc: " Thomas Gleixner
2012-05-05 19:01   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-08  9:37   ` [patch V2 19/31] " Jonas Bonn
2012-05-03  9:02 ` [patch V2 18/31] mn10300: " Thomas Gleixner
2012-05-05 19:01   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 21/31] powerpc: " Thomas Gleixner
2012-05-05 19:03   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 20/31] parisc: " Thomas Gleixner
2012-05-05 19:02   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 22/31] s390: " Thomas Gleixner
2012-05-03 10:00   ` Heiko Carstens
2012-05-05 19:04   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 23/31] score: " Thomas Gleixner
2012-05-05 19:05   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 26/31] tile: " Thomas Gleixner
2012-05-05 19:07   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 24/31] sh: " Thomas Gleixner
2012-05-05 19:06   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:02 ` [patch V2 25/31] sparc: " Thomas Gleixner
2012-05-05 19:06   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:03 ` [patch V2 27/31] um: " Thomas Gleixner
2012-05-05 19:09   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:03 ` [patch V2 28/31] unicore32: " Thomas Gleixner
2012-05-05 19:08   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:03 ` [patch V2 29/31] x86: " Thomas Gleixner
2012-05-05 19:10   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:03 ` [patch V2 30/31] xtensa: " Thomas Gleixner
2012-05-05 19:11   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-03  9:03 ` [patch V2 31/31] init_task: Replace CONFIG_HAVE_GENERIC_INIT_TASK Thomas Gleixner
2012-05-05 19:11   ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2012-05-04 17:28 ` [patch V2 03/31] task_allocator: Use config switches instead of magic defines David Howells
2012-05-05 10:54   ` Thomas Gleixner
2012-05-04 17:30 ` [patch V2 02/31] frv: Use core allocator for task_struct David Howells

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