Subject: [PATCH 6/6] ARM: zImage: prevent constant copy+rebuild of lib1funcs.S

From: [email-masked] (Stephen Boyd)
Date: Thu, 15 Sep 2011 20:58:39 -0700

On 09/13/11 22:41, Nicolas Pitre wrote:
> From: Nicolas Pitre <[email-masked]>
>
> The rule to copy this file doesn't have to be forced.  However
> lib1funcs.[So] have to be listed amongst the targets.
>
> This prevents zImage from being recreated needlessly.
>
> Signed-off-by: Nicolas Pitre <[email-masked]>
> ---
>  arch/arm/boot/compressed/Makefile |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
> index ce2bef536e..db1fd260ed 100644
> --- a/arch/arm/boot/compressed/Makefile
> +++ b/arch/arm/boot/compressed/Makefile
> @@ -112,7 +112,7 @@ endif
>  
>  targets       := vmlinux vmlinux.lds \
>  		 piggy.$(suffix_y) piggy.$(suffix_y).o \
> -		 font.o font.c head.o misc.o $(OBJS)
> +		 lib1funcs.o lib1funcs.S font.o font.c head.o misc.o $(OBJS)
>  
>  # Make sure files are removed during clean
>  extra-y       += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S $(libfdt) $(libfdt_hdrs)
> @@ -147,7 +147,7 @@ LDFLAGS_vmlinux += -T
>  # For __aeabi_uidivmod
>  lib1funcs = $(obj)/lib1funcs.o
>  
> -$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
> +$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S
>  	$(call cmd,shipped)
>  
>  # We need to prevent any GOTOFF relocs being used with references

I already posted a very similar patch and put it into Russell's patch
tracker. Can't you just use that instead?

http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7016/1
http://lists.arm.linux.org.uk/lurker/message/20110812.190002.18f88875.en.html

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