On Tue, Jun 13, 2017 at 02:16:49PM -0700, Dan Williams wrote:
> On Tue, Jun 13, 2017 at 2:06 PM, Ross Zwisler
> <ross.zwisler@xxxxxxxxxxxxxxx> wrote:
> > So, if the VM_NOHUGEPAGE flag is set or if the vma is for a temporary stack,
> > we always bail. Also, we only care about the VM_HUGEPAGE flag in the presence
> > of TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG.
> >
> > I think this static inline is logically equivalent (untested):
> >
> > static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma)
> > {
> > if ((vma->vm_flags & VM_NOHUGEPAGE) || is_vma_temporary_stack(vma))
> > return false;
> >
> > if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG))
> > return true;
> >
> > if ((transparent_hugepage_flags &
> > (1 << TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))
> > && vma->vm_flags & VM_HUGEPAGE)
> > return true;
>
> We can clean this up a bit and do:
>
> return !!(vma->vm_flags & VM_HUGEPAGE)
>
> ...to drop the &&
Sure, that'll read better.
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