Re: [PATCH v9 6/9] perf c2c: add function view hierarchy entry creation

> Add the entry-creation layer: owned-reference child allocation and
> insertion, and the level-1/2/3 lookup-or-create functions keyed by
> function symbol (level 1 read-side, level 2 writer) and by the source
> cacheline's existing index (level 3).
> 
> Give synthetic children normal entry operations and acquire their thread
> and map-symbol references. This lets the hierarchy teardown use
> hist_entry__delete() for the common fields while the function-view free
> callback handles the private child tree and containing allocation.
> 
> Reuse cacheline_idx to preserve the source entry identity without adding
> function-view-only state. Add c2c_function__find_cacheline() to locate the
> original cacheline entry by the same index.
> 
> These are driven by the hierarchy builder in the next patch and are
> __maybe_unused until then.
> 
> Signed-off-by: Jiebin Sun <[email protected]>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/[email protected]?part=6