Locking in the clk API, part 2: clk_prepare/clk_unprepare

[Russell King - ARM Linux]

On Tue, Feb 01, 2011 at 08:32:01PM +0100, Uwe Kleine-König wrote:
> On Tue, Feb 01, 2011 at 05:06:37PM +0000, Russell King - ARM Linux wrote:
> > So?  You're not _supposed_ to call it from any atomic context ever.
>
> My motivation for a more complicated clk_prepare was to make clk_prepare
> atomic when that's possible (i.e. when the clk is already prepared) and
> call it before the enable callback in clk_enable.  Then everything
> behaves nicely even if clk_enable is called from atomic context provided
> that the clock was prepared before (or doesn't need to).

You really don't get the point of clk_prepare() do you.  I'm not
going to bother trying to educate you anymore.

Hopefully someone with more patience can give you the necessary
teaching to make you understand.