Re: [PATCH 2/5] seqlock: Fold seqcount_LOCKNAME_t definition

[peterz]

On Wed, Jul 29, 2020 at 03:55:07PM +0100, Matthew Wilcox wrote:
> On Wed, Jul 29, 2020 at 03:52:51PM +0200, Peter Zijlstra wrote:
> > Manual repetition is boring and error prone.
> 
> Yes, but generated functions are hard to grep for, and I'm pretty sure
> that kernel-doc doesn't know how to expand macros into comments that it
> can then extract documentation from.
> 
> I've been thinking about how to cure this (mostly in the context
> of page-flags.h).  I don't particularly like the C preprocessor, but
> m4 is worse and defining our own preprocessing language seems like a
> terrible idea.
> 
> So I was thinking about moving the current contents of page-flags.h
> to include/src/page-flags.h, making linux/page-flags.h depend on
> src/page-flags.h and run '$(CPP) -C' to generate it.  I've been a little
> busy recently and haven't had time to do more than muse about this, but
> I think it might make sense for some of our more heavily macro-templated
> header files.

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