[PATCH 1/2] ARM: l2x0: make it possible to disable outer sync from DT

Arnd Bergmann arnd at arndb.de
Thu Dec 10 06:20:36 PST 2015

On Thursday 10 December 2015 15:14:15 Linus Walleij wrote:
> Some RealView platforms have broken outer_sync, see:
> http://marc.info/?l=linux-kernel&m=144846940516899&w=2
> We got rid of the custom barriers from the machine by disabling
> outer sync, but that was just for the boardfile case. We have
> to be able to do the same in the device tree case.
> Since __l2c_init() is cloning and copying the L2C vtable,
> we pass an argument to this function to optionally numb
> the outer sync operation if desired, before initializing
> the cache.
> After this we can set up the cache correctly on the RealView
> PB11MPCore, and it boots rock solid with the cache enabled.
> Before this, spurious crashes would occur if we try to set
> up the cache properly.
> Cc: Russell King <linux at arm.linux.org.uk>
> Cc: Arnd Bergmann <arnd at arndb.de>
> Cc: devicetree at vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>

This has the same effect as my "ARM: realview: remove private barrier
implementation" patch and replaces part of that, correct?


More information about the linux-arm-kernel mailing list