Re: [PATCH 1/2] clk: Make __clk_lookup() use a list instead of tree search

On 09/04, Stephen Boyd wrote:

In the near future we're going to move the prepare lock to be a per-clock ww_mutex. __clk_lookup() is called very deep in the set-rate path and we would like to avoid having to take all the locks in the clock tree to search for a clock (basically defeating the purpose of introducing per-clock locks). Introduce a new list that contains all clocks registered in the system and walk this list until the clock is found.

Signed-off-by: Stephen Boyd sboyd@codeaurora.org

Actually this won't work. We can't grab the list lock while the prepare lock is held. So we need to do the debugfs stuff with a different lock and do it outside of the prepare lock.