Re: [PATCH] blk-mq: code clean-up by adding an API to clear set->mq_map

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On Mon, Jul 02, 2018 at 09:55:57PM +0900, Minwoo Im wrote:
> No 2nd follow-up patch will be there.  I thought these two parts are
> using a same unit-function to clear the set->mq-map.  Also thought it
> would be great for the future use when it needs to be cleared.
> However, as you mentioned, I totally agree with your point.  It seems
> just churns for churns' sake with no more usage for now.

I actually mis-read your patch, I'm sorry.

You're consolidating two callers of this so I guess this is not so
problematic. I somehow ignored the first hunk in the patch.

You could still evaluate if it isn't worth to make it:
+static void blk_mq_clear_mq_map(struct blk_mq_tag_set *set)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu)
+		set->mq_map[cpu] = 0;
+}

and put it into 'include/linux/blk-mq.h'.

    Johannes
-- 
Johannes Thumshirn                                          Storage
jthumshirn@xxxxxxx                                +49 911 74053 689
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