Messages in this thread | | | Date | Wed, 11 Mar 2020 20:00:23 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 1/1] backing-dev: refactor wb_congested_put() |
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On Wed, 11 Mar 2020 19:29:48 -0700 Matthew Wilcox <willy@infradead.org> wrote:
> On Wed, Mar 11, 2020 at 05:59:19PM -0700, Andrew Morton wrote: > > hm, it's hard to get excited over this. Open-coding the > > refcount_dec_and_lock_irqsave() internals at a callsite in order to > > make sparse happy. > > > > Is there some other way, using __acquires (for example)? > > sparse is really bad at conditional lock acquisition.
I can well imagine.
> we have similar > problems over the vfs. but we shouldn't be obfuscating our code to make > the tool happy.
Perhaps sparse needs a way of being directed to suppress checking across a particular function.
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