Because it's redundant. It's *always* p == current (and the code
assumes this!), but I had to grep the callers to find out.
Moreover, the function doesn't make *sense* if p != current...
> > 3) lock_task_rq returns the rq, rather than assigning it, for clarity.
> i've made it an inline function instead of a macro.
I thought of that, but assumed you had a good reason for making it a
macro in the first place...
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