[PATCH] ARM: kdump: copy kernel relocation code at the kexec prepare stage

Russell King - ARM Linux linux at arm.linux.org.uk
Mon Sep 19 10:41:37 EDT 2011

On Mon, Sep 19, 2011 at 07:11:59AM -0700, Lei Wen wrote:
> Thanks for this reminding!
> Then how about add flush_icache_range at the end of machine_kexec_prepare?
> Could it be acceptable?

I think it should be done.

> Also with this change, do we still need flush icache at the end stage of
> machine_kexec?

You need to use flush_icache_range() whenever you write _instructions_
to an area of memory which you intend to execute.  If you're not writing
instructions, you shouldn't use flush_icache_range().

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