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authorThomas Gleixner <tglx@linutronix.de>2012-05-03 09:02:48 +0000
committerThomas Gleixner <tglx@linutronix.de>2012-05-05 13:00:21 +0200
commita4a2eb490e38aaff61eafcb8cde6725ad1be22ab (patch)
treecc626df26302e96f3fc7247f3fe895d2eddb69f6
parentc6ae063aaf3786b9db7f19a90bf4ed8aaebb7f90 (diff)
init_task: Create generic init_task instance
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: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20120503085034.092585287@linutronix.de
-rw-r--r--arch/Kconfig3
-rw-r--r--init/Makefile1
-rw-r--r--init/init_task.c24
-rw-r--r--kernel/sched/Makefile2
4 files changed, 28 insertions, 2 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 4f0d0f7c8313..2dd8fdd7ea9f 100644
--- a/arch/Kconfig
+++ b/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
diff --git a/init/Makefile b/init/Makefile
index 0bf677aa0872..c55eac955cdc 100644
--- a/init/Makefile
+++ b/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
diff --git a/init/init_task.c b/init/init_task.c
new file mode 100644
index 000000000000..8b2f3996b035
--- /dev/null
+++ b/init/init_task.c
@@ -0,0 +1,24 @@
+#include <linux/init_task.h>
+#include <linux/export.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) };
diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile
index 9a7dd35102a3..173ea52f3af0 100644
--- a/kernel/sched/Makefile
+++ b/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
-
-