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Message-ID: <58ea909bd178d97bcc73997d6499880137d5e4ed.1734407924.git-series.apopple@nvidia.com> Date: Tue, 17 Dec 2024 16:13:00 +1100 From: Alistair Popple <apopple@...dia.com> To: akpm@...ux-foundation.org, dan.j.williams@...el.com, linux-mm@...ck.org Cc: Alistair Popple <apopple@...dia.com>, lina@...hilina.net, zhang.lyra@...il.com, gerald.schaefer@...ux.ibm.com, vishal.l.verma@...el.com, dave.jiang@...el.com, logang@...tatee.com, bhelgaas@...gle.com, jack@...e.cz, jgg@...pe.ca, catalin.marinas@....com, will@...nel.org, mpe@...erman.id.au, npiggin@...il.com, dave.hansen@...ux.intel.com, ira.weiny@...el.com, willy@...radead.org, djwong@...nel.org, tytso@....edu, linmiaohe@...wei.com, david@...hat.com, peterx@...hat.com, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org, nvdimm@...ts.linux.dev, linux-cxl@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, jhubbard@...dia.com, hch@....de, david@...morbit.com Subject: [PATCH v4 17/25] memremap: Add is_device_dax_page() and is_fsdax_page() helpers Add helpers to determine if a page or folio is a device dax or fs dax page or folio. Signed-off-by: Alistair Popple <apopple@...dia.com> --- include/linux/memremap.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/linux/memremap.h b/include/linux/memremap.h index 0256a42..f2a8d13 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -187,6 +187,28 @@ static inline bool folio_is_device_coherent(const struct folio *folio) return is_device_coherent_page(&folio->page); } +static inline bool is_fsdax_page(const struct page *page) +{ + return is_zone_device_page(page) && + page_pgmap(page)->type == MEMORY_DEVICE_FS_DAX; +} + +static inline bool folio_is_fsdax(const struct folio *folio) +{ + return is_fsdax_page(&folio->page); +} + +static inline bool is_device_dax_page(const struct page *page) +{ + return is_zone_device_page(page) && + page_pgmap(page)->type == MEMORY_DEVICE_GENERIC; +} + +static inline bool folio_is_device_dax(const struct folio *folio) +{ + return is_device_dax_page(&folio->page); +} + #ifdef CONFIG_ZONE_DEVICE void zone_device_page_init(struct page *page); void *memremap_pages(struct dev_pagemap *pgmap, int nid); -- git-series 0.9.1
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