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m68k: merge the init_task code for mmu and non-mmu targets

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The init_task code can be the same for both mmu and non-mmu targets.
None of the alignment carried out in the the current init_task code
is necessary. The linker script takes care of aligning the init_thread
structure to a THREAD SIZE boundary, and that is all we need.

So use the init_task.c code for all target types, that makes m68k
code consistent with what most other architectures do.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Greg Ungerer 2011-08-30 16:11:05 +10:00
parent ed3da2c443
commit 409ee2455c
3 changed files with 3 additions and 23 deletions
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7
arch/m68k/kernel/Makefile
View file

@ -6,15 +6,12 @@ extra-$(CONFIG_MMU) := head.o
extra-$(CONFIG_SUN3) := sun3-head.o
extra-y += vmlinux.lds
obj-y := entry.o irq.o m68k_ksyms.o module.o process.o ptrace.o setup.o \
signal.o sys_m68k.o syscalltable.o time.o traps.o
obj-y := entry.o init_task.o irq.o m68k_ksyms.o module.o process.o ptrace.o
obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o
obj-$(CONFIG_MMU) += ints.o vectors.o
ifndef CONFIG_MMU_SUN3
obj-y += dma.o
endif
ifndef CONFIG_MMU
obj-y += init_task.o
endif

3
arch/m68k/kernel/init_task.c
View file

@ -19,7 +19,6 @@ static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
*
* All other task structs will be allocated on slabs in fork.c
*/
__asm__(".align 4");
struct task_struct init_task = INIT_TASK(init_task);
EXPORT_SYMBOL(init_task);
@ -27,7 +26,7 @@ EXPORT_SYMBOL(init_task);
/*
* Initial thread structure.
*
* We need to make sure that this is 8192-byte aligned due to the
* We need to make sure that this is THREAD size aligned due to the
* way process stacks are handled. This is done by having a special
* "init_task" linker map entry..
*/

16
arch/m68k/kernel/process_mm.c
View file

@ -33,22 +33,6 @@
#include <asm/setup.h>
#include <asm/pgtable.h>
/*
* Initial task/thread structure. Make this a per-architecture thing,
* because different architectures tend to have different
* alignment requirements and potentially different initial
* setup.
*/
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
union thread_union init_thread_union __init_task_data
__attribute__((aligned(THREAD_SIZE))) =
{ INIT_THREAD_INFO(init_task) };
/* initial task structure */
struct task_struct init_task = INIT_TASK(init_task);
EXPORT_SYMBOL(init_task);
asmlinkage void ret_from_fork(void);