Re: [PATCH] fs: xfs: Change return type to vm_fault_t

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On Sun, Apr 15, 2018 at 12:21:21AM -0700, Christoph Hellwig wrote:
> On Sat, Apr 14, 2018 at 03:24:07PM -0700, Matthew Wilcox wrote:
> > On Sun, Apr 15, 2018 at 07:59:37AM +1000, Dave Chinner wrote:
> > > On Sun, Apr 15, 2018 at 01:35:30AM +0530, Souptick Joarder wrote:
> > > > Use new return type vm_fault_t for fault handlers.
> > > > 
> > > > Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
> > > > Reviewed-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
> > > 
> > > Ummm. Why are we adding typedefs to hide basic types?
> > > 
> > > typedef int vm_fault_t;
> > 
> > That's the intermediate step.  It's going to become a sparse typedef
> > like gfp_t once everything's converted.  And the "why" is that people
> > are still returning -EFOO when they should be returning VM_FAULT_FOO.
> 
> Please just send one damn patch adding the typedef and the sparse
> annotation and converting everyone over.  Splitting this into five
> gazillion patches that do nothing doesn't help anyone.

The XFS one is trivial.  Many of the others are not.
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