[PATCH v2] arm: plat-samsung: check processor type before cache restoration in resume

[Russell King - ARM Linux]

On Tue, Feb 26, 2013 at 04:46:01PM +0530, Inderpal Singh wrote:
> On 26 February 2013 15:32, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> > On Tue, Feb 26, 2013 at 03:26:53PM +0530, Inderpal Singh wrote:
> >> Only cortex-a9 based samsung platforms have l2x0 cache controller. Hence check
> >> the same before restoring the cache in resume.
> >
> > Why is this patch soo complicated?  Can't you read the CPUs MIDR register
> > from assembly code?
> 
> I wanted to read MIDR only once thats why didn't read in resume
> function in assembly as the same resume function gets used in cpuidle
> path.

It's more expensive to load it from memory than to read it from CP15.