On Thu, Sep 13, 2012 at 12:39:49PM +0100, Dave Martin wrote:
> We could introduce something like CONFIG_ARM_HAVE_CACHEFLUSH_LOUIS, and
> do:
>
> <asm/glue-cache.h>
> #ifndef MULTI_CACHE
> #ifdef CONFIG_HAVE_ARM_CACHEFLUSH_LOUIS
> #define __cpuc_flush_kern_cache_louis __glue(_CACHE,_flush_kern_cache_louis)
> #else
> #define __cpuc_flush_kern_cache_louis __glue(_CACHE,_flush_kern_all)
> #endif
> #endif
>
> <asm/cacheflush.h>
> #ifdef MULTI_CACHE
> #define flush_cache_louis() cpu_cache.flush_kern_cache_louis()
> #else
> #define flush_cache_louis() __cpuc_flush_kern_cache_louis()
> #endif
No, this is stupidly complicated and is fragile. Just alias the
functions, like we do in cache-v4wt.S:
.globl v4wt_dma_flush_range
.equ v4wt_dma_flush_range, v4wt_dma_inv_range
except, you'll need:
.globl v4wt_flush_kern_cache_louis
.equ v4wt_flush_kern_cache_louis, v4wt_flush_kern_cache_all
You can do it automatically, using the attached sedscript and this bit
of shell:
$ for f in $(grep -l define_cache_functions arch/arm/mm/*.S ); do
sed -if sedscript $f
git add $f
done
$ git commit -s
Do that first, and then go over those which you need to add a real
flush_kern_cache_louis function to.
1,/__INITDATA\|define struct cpu_cache_fns/ {
/ENTRY.*flush_kern_cache_all/ {
h
s/.*(\([^_]*\)_.*/\t.globl\t\1_flush_kern_cache_louis\n\t.equ\t\1_flush_kern_cache_louis,
\1_flush_kern_cache_all\n/
x
}
/__INITDATA\|define struct cpu_cache_fns/ {
H
g
}
}
