From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stuart MENEFY <stuart.menefy@st.com>
Date: Thu, 03 Dec 2009 13:48:15 +0000
Subject: Re: [PATCH] sh: include empty zero page in zImage
Message-Id: <4B17C19F.2080305@st.com>
List-Id: <linux-sh.vger.kernel.org>
References: <20091203122619.9975.58412.sendpatchset@rxone.opensource.se>
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To: linux-sh@vger.kernel.org

Magnus

If you do this won't you overwrite any parameters from the boot loader?

Stuart

Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
> 
> Include the empty zero page data in the zImage.
> Without this patch the empty zero page may be
> uninitialized.
> 
> Signed-off-by: Magnus Damm <damm@opensource.se>
> ---
> 
>  I suppose we should have a fallback option to
>  allow boot loaders passing data in the zero page.
>  Or perhaps doing it the other way around is better.
> 
>  arch/sh/boot/compressed/Makefile |    2 --
>  arch/sh/boot/compressed/misc.c   |    2 +-
>  2 files changed, 1 insertion(+), 3 deletions(-)
> 
> --- 0001/arch/sh/boot/compressed/Makefile
> +++ work/arch/sh/boot/compressed/Makefile	2009-12-03 21:06:02.000000000 +0900
> @@ -48,8 +48,6 @@ $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.al
>  $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
>  	$(call if_changed,lzma)
>  
> -OBJCOPYFLAGS += -R .empty_zero_page
> -
>  LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
>  
>  $(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) FORCE
> --- 0001/arch/sh/boot/compressed/misc.c
> +++ work/arch/sh/boot/compressed/misc.c	2009-12-03 21:05:58.000000000 +0900
> @@ -131,7 +131,7 @@ void decompress_kernel(void)
>  #ifdef CONFIG_SUPERH64
>  	output_addr = (CONFIG_MEMORY_START + 0x2000);
>  #else
> -	output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
> +	output_addr = __pa((unsigned long)&_text);
>  #ifdef CONFIG_29BIT
>  	output_addr |= P2SEG;
>  #endif
> --
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