Re: [patch 19/29] powerpc: Use generic init_task

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Mon, 2012-04-30 at 20:16 +0000, Thomas Gleixner wrote:
> plain text document attachment (powerpc-use-generic-init-task.patch)
> Same code. Use the generic version.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> ---
>  arch/powerpc/Kconfig            |    1 +
>  arch/powerpc/kernel/Makefile    |    2 +-
>  arch/powerpc/kernel/init_task.c |   29 -----------------------------
>  3 files changed, 2 insertions(+), 30 deletions(-)
> 
> Index: tip/arch/powerpc/Kconfig
> ===================================================================
> --- tip.orig/arch/powerpc/Kconfig
> +++ tip/arch/powerpc/Kconfig
> @@ -145,6 +145,7 @@ config PPC
>  	select HAVE_ARCH_JUMP_LABEL
>  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
>  	select GENERIC_SMP_IDLE_THREAD
> +	select HAVE_GENERIC_INIT_TASK
>  
>  config EARLY_PRINTK
>  	bool
> Index: tip/arch/powerpc/kernel/Makefile
> ===================================================================
> --- tip.orig/arch/powerpc/kernel/Makefile
> +++ tip/arch/powerpc/kernel/Makefile
> @@ -28,7 +28,7 @@ endif
>  
>  obj-y				:= cputable.o ptrace.o syscalls.o \
>  				   irq.o align.o signal_32.o pmc.o vdso.o \
> -				   init_task.o process.o systbl.o idle.o \
> +				   process.o systbl.o idle.o \
>  				   signal.o sysfs.o cacheinfo.o time.o \
>  				   prom.o traps.o setup-common.o \
>  				   udbg.o misc.o io.o dma.o \
> Index: tip/arch/powerpc/kernel/init_task.c
> ===================================================================
> --- tip.orig/arch/powerpc/kernel/init_task.c
> +++ /dev/null
> @@ -1,29 +0,0 @@
> -#include <linux/mm.h>
> -#include <linux/export.h>
> -#include <linux/sched.h>
> -#include <linux/init.h>
> -#include <linux/init_task.h>
> -#include <linux/fs.h>
> -#include <linux/mqueue.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 thread structure.
> - *
> - * We need to make sure that this is 16384-byte aligned due to the
> - * way process stacks are handled. This is done by having a special
> - * "init_task" linker map entry..
> - */
> -union thread_union init_thread_union __init_task_data =
> -	{ 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);
>