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mips: Use generic init_task

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Same code. Use the generic version. The special Makefile treatment is
pointless anyway as init_task.o contains only data which is handled by
the linker script. So no point on being treated like head text.

Make the linker script align the task on THREAD_SIZE and not on
PAGE_SIZE, as PAGE_SIZE might be smaller than THREAD_SIZE.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20120503085034.941344764@linutronix.de
This commit is contained in:
Thomas Gleixner 2012-05-03 09:02:55 +00:00
parent 16caadb8c8
commit 957b369c3d
5 changed files with 4 additions and 38 deletions
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1
arch/mips/Kconfig
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@ -30,6 +30,7 @@ config MIPS
select HAVE_MEMBLOCK_NODE_MAP
select ARCH_DISCARD_MEMBLOCK
select GENERIC_SMP_IDLE_THREAD
select HAVE_GENERIC_INIT_TASK
menu "Machine selection"

2
arch/mips/Makefile
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@ -235,7 +235,7 @@ endif
OBJCOPYFLAGS += --remove-section=.reginfo
head-y := arch/mips/kernel/head.o arch/mips/kernel/init_task.o
head-y := arch/mips/kernel/head.o
libs-y += arch/mips/lib/

2
arch/mips/kernel/Makefile
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@ -2,7 +2,7 @@
# Makefile for the Linux/MIPS kernel.
#
extra-y := head.o init_task.o vmlinux.lds
extra-y := head.o vmlinux.lds
obj-y += cpu-probe.o branch.o entry.o genex.o irq.o process.o \
ptrace.o reset.o setup.o signal.o syscall.o \

35
arch/mips/kernel/init_task.c
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@ -1,35 +0,0 @@
#include <linux/mm.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <linux/init_task.h>
#include <linux/fs.h>
#include <linux/mqueue.h>
#include <asm/thread_info.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
/*
* Initial thread structure.
*
* We need to make sure that this is 8192-byte aligned due to the
* way process stacks are handled. This is done by making sure
* the linker maps this in the .text segment right after head.S,
* and making head.S ensure the proper alignment.
*
* The things we do for performance..
*/
union thread_union init_thread_union __init_task_data
__attribute__((__aligned__(THREAD_SIZE))) =
{ INIT_THREAD_INFO(init_task) };
/*
* Initial task structure.
*
* All other task structs will be allocated on slabs in fork.c
*/
struct task_struct init_task = INIT_TASK(init_task);
EXPORT_SYMBOL(init_task);

2
arch/mips/kernel/vmlinux.lds.S
View File

@ -72,7 +72,7 @@ SECTIONS
.data : { /* Data */
. = . + DATAOFFSET; /* for CONFIG_MAPPED_KERNEL */
INIT_TASK_DATA(PAGE_SIZE)
INIT_TASK_DATA(THREAD_SIZE)
NOSAVE_DATA
CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)