| Message ID | 20220210072828.2930359-10-hch@lst.de (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [01/27] mm: remove a pointless CONFIG_ZONE_DEVICE check in memremap_pages | expand |
On 2022-02-10 12:28 a.m., Christoph Hellwig wrote: > Key off on the existence of ->page_free to prepare for adding support for > more pgmap types that are device managed and thus need the free callback. > > Signed-off-by: Christoph Hellwig <hch@lst.de> Great! This makes my patch simpler. Reviewed-by: Logan Gunthorpe <logang@deltatee.com> > --- > mm/memremap.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/mm/memremap.c b/mm/memremap.c > index fef5734d5e4933..e00ffcdba7b632 100644 > --- a/mm/memremap.c > +++ b/mm/memremap.c > @@ -452,7 +452,7 @@ EXPORT_SYMBOL_GPL(get_dev_pagemap); > > void free_zone_device_page(struct page *page) > { > - if (WARN_ON_ONCE(!is_device_private_page(page))) > + if (WARN_ON_ONCE(!page->pgmap->ops || !page->pgmap->ops->page_free)) > return; > > __ClearPageWaiters(page); > @@ -460,7 +460,7 @@ void free_zone_device_page(struct page *page) > mem_cgroup_uncharge(page_folio(page)); > > /* > - * When a device_private page is freed, the page->mapping field > + * When a device managed page is freed, the page->mapping field > * may still contain a (stale) mapping value. For example, the > * lower bits of page->mapping may still identify the page as an > * anonymous page. Ultimately, this entire field is just stale >
diff --git a/mm/memremap.c b/mm/memremap.c index fef5734d5e4933..e00ffcdba7b632 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -452,7 +452,7 @@ EXPORT_SYMBOL_GPL(get_dev_pagemap); void free_zone_device_page(struct page *page) { - if (WARN_ON_ONCE(!is_device_private_page(page))) + if (WARN_ON_ONCE(!page->pgmap->ops || !page->pgmap->ops->page_free)) return; __ClearPageWaiters(page); @@ -460,7 +460,7 @@ void free_zone_device_page(struct page *page) mem_cgroup_uncharge(page_folio(page)); /* - * When a device_private page is freed, the page->mapping field + * When a device managed page is freed, the page->mapping field * may still contain a (stale) mapping value. For example, the * lower bits of page->mapping may still identify the page as an * anonymous page. Ultimately, this entire field is just stale
Key off on the existence of ->page_free to prepare for adding support for more pgmap types that are device managed and thus need the free callback. Signed-off-by: Christoph Hellwig <hch@lst.de> --- mm/memremap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)