[PATCH 7/8] ARM: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP

[Russell King - ARM Linux]

On Tue, May 04, 2010 at 05:44:54PM +0100, Catalin Marinas wrote:
> The standard I-cache Invalidate All (ICIALLU) and Branch Predication
> Invalidate All (BPIALL) operations are not automatically broadcast to
> the other CPUs in an ARMv7 MP system. The patch adds the Inner Shareable
> variants, ICIALLUIS and BPIALLIS, if ARMv7 and SMP.

FYI, I'm considering reverting this patch; this patch is one of two
responsible for causing a stability regression of Versatile Express
platform.

The two commits responsible for making Versatile Express userspace
completely unstable are:

b8349b569aae661dea9d59d7d2ee587ccea3336c
ARM: 6112/1: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP

7e5a69e83ba7a0d5917ad830f417cba8b8d6aa72
ARM: 6007/1: fix highmem with VIPT cache and DMA

Most of the instability is from the second patch, but reverting just
the second patch doesn't fully restore userspace stability.