> > > > > > So I would put the helper in include/linux/dax.h and have it like: > > > > > > bool daxdev_mapping_supported(struct vm_area_struct *vma, > > Should this be static inline if you're putting it in the header file? yes. Thanks. > > A comment ought to be added to describe what this predicate function > does. Sure, will add a comment describing the function. > > > > struct dax_device *dax_dev) > > > { > > > if (!(vma->vm_flags & VM_SYNC)) > > > return true; > > > if (!IS_DAX(file_inode(vma->vm_file))) > > > return false; > > > return dax_synchronous(dax_dev); > > > } > > > > Sure. This is much better. I was also not sure what to name the helper > > function. > > I will go ahead with this unless 'Dave' & 'Darrick' have anything to add. > > Jan's approach (modulo that one comment) looks good to me. Sure. Thank you. Best regards, Pankaj > > --D >