[PATCH] ARM: cache-l2x0: optimize aurora range operations

Thomas Petazzoni thomas.petazzoni at free-electrons.com
Thu Sep 11 03:08:39 PDT 2014

Dear Arnd Bergmann,

On Mon, 08 Sep 2014 22:43:32 +0200, Arnd Bergmann wrote:
> The aurora_inv_range(), aurora_clean_range() and aurora_flush_range()
> functions are highly redundant, both in source and in object code, and
> they are harder to understand than necessary.
> By moving the range loop into the aurora_pa_range() function, they
> become trivial wrappers, and the object code start looking like what
> one would expect for an optimal implementation.
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>
> ---
>  arch/arm/mm/cache-l2x0.c | 67 +++++++++++++++++-----------------------------------------
>  1 file changed, 22 insertions(+), 45 deletions(-)

Tested-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
 (on Armada 370 RD and Armada XP GP, boot tested, plus a little bit of
 DMA traffic by reading data from a SD card)

Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering

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