On 10/6/20 2:55 AM, Dan Williams wrote: > The 'struct resource' in 'struct dev_pagemap' is only used for holding > resource span information. The other fields, 'name', 'flags', 'desc', > 'parent', 'sibling', and 'child' are all unused wasted space. > > This is in preparation for introducing a multi-range extension of > devm_memremap_pages(). > > The bulk of this change is unwinding all the places internal to libnvdimm > that used 'struct resource' unnecessarily, and replacing instances of > 'struct dev_pagemap'.res with 'struct dev_pagemap'.range. > > P2PDMA had a minor usage of the resource flags field, but only to report > failures with "%pR". That is replaced with an open coded print of the > range. > > Link: https://lkml.kernel.org/r/159643103173.4062302.768998885691711532.stgit@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx > Link: https://lkml.kernel.org/r/20200926121402.GA7467@kadam > Cc: Paul Mackerras <paulus@xxxxxxxxxx> > Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx> > Cc: Vivek Goyal <vgoyal@xxxxxxxxxx> > Cc: Dave Jiang <dave.jiang@xxxxxxxxx> > Cc: Ben Skeggs <bskeggs@xxxxxxxxxx> > Cc: David Airlie <airlied@xxxxxxxx> > Cc: Daniel Vetter <daniel@xxxxxxxx> > Cc: Ira Weiny <ira.weiny@xxxxxxxxx> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> > Cc: Juergen Gross <jgross@xxxxxxxx> > Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx> > Cc: "Jérôme Glisse" <jglisse@xxxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> For Xen bits Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
