Re: [RFC PATCH 3/7] block: allow to bypass bio check before submitting bio

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On Wed, Feb 09, 2022 at 04:12:43PM +0800, Ming Lei wrote:
> On Mon, Jan 17, 2022 at 12:21:37AM -0800, Christoph Hellwig wrote:
> > 
> > >   * systems and other upper level users of the block layer should use
> > >   * submit_bio() instead.
> > >   */
> > > -void submit_bio_noacct(struct bio *bio)
> > > +void __submit_bio_noacct(struct bio *bio, bool check)
> > >  {
> > > -	if (unlikely(!submit_bio_checks(bio)))
> > > +	if (unlikely(check && !submit_bio_checks(bio)))
> > >  		return;
> > 
> > This doesn't make sense as an API - you can just move the checks
> > into the caller that pass check=true.
> 
> But submit_bio_checks() is local helper, and it is hard to make it
> public to drivers. Not mention there are lots of callers to
> submit_bio_noacct().

What I mean is something like:

-void submit_bio_noacct(struct bio *bio)
+void submit_bio_noacct_nocheck(struct bio *bio)
 {
-	if (unlikely(!submit_bio_checks(bio)))
-		return

...

+void submit_bio_noacct(struct bio *bio)
+{
+	if (unlikely(!submit_bio_checks(bio)))
+		return
+	submit_bio_noacct_nocheck(bio);
+}




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