linux-kernel - Re: [RFC PATCH 4/8] thp: Add thp_get_unmapped_area

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Date: Fri, 16 Feb 2024 22:21:13 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>
CC: "debug@...osinc.com" <debug@...osinc.com>, "luto@...nel.org"
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Subject: Re: [RFC PATCH 4/8] thp: Add thp_get_unmapped_area_vmflags()

On Fri, 2024-02-16 at 14:59 +0200, Kirill A. Shutemov wrote:
> On Thu, Feb 15, 2024 at 03:13:28PM -0800, Rick Edgecombe wrote:
> > +unsigned long thp_get_unmapped_area(struct file *filp, unsigned
> > long addr,
> > +               unsigned long len, unsigned long pgoff, unsigned
> > long flags)
> > +{
> > +       return thp_get_unmapped_area_vmflags(filp, addr, len,
> > pgoff, flags, 0);
> >   }
> >   EXPORT_SYMBOL_GPL(thp_get_unmapped_area);
> 
> Again, static inline should be fine.

Not sure if the diff might be a bit misleading here, the signature of
thp_get_unmapped_area() didn't actually change.

If thp_get_unmapped_area() is made into a static inline, then
thp_get_unmapped_area_vmflags() would need to be exported instead so it
could be used in some modules. Unlike get_unmapped_area()
thp_get_unmapped_area is actually is used that way.

Better to export the more limited version?