[RFC PATCH] ARM: uprobes need icache flush after xol write

[Russell King - ARM Linux]

On Tue, Apr 08, 2014 at 04:41:17PM +0100, Russell King - ARM Linux wrote:
> I think let's start out by killing this function - the semantics of
> this function have been lost, so it's not clear what it was supposed
> to do in its original form.  Even going back to the start of git
> history, it looks like it was never used outside arch code.

I floated a patch to remove flush_icache_user_range() to the architecture
maintainers, giving the background to how this came about.  I received the
following reply from David Miller:

> ptrace() accesses (via __access_remote_vm()) already use an existing
> helper function for these sorts of situations, in the form of
> copy_{to,from}_user_page().  I would suggest that uprobes uses that
> as well.

I think this is a very valid point, and echo's my point.

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