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mm: reimplement folio_is_device_private()

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For callers of folio_is_device_private(), we save a folio->page->folio
conversion.  Callers of is_device_private_page() simply move the
conversion of page->folio from the implementation of page_pgmap() to
is_device_private_page().

Link: https://lkml.kernel.org/r/20250805172307.1302730-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2025-08-05 18:22:58 +01:00
committed by Andrew Morton
parent 89ef6ad6fa
commit 7cfe9cafb6
1 changed files with 8 additions and 7 deletions
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15
include/linux/memremap.h
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@@ -157,16 +157,17 @@ static inline unsigned long pgmap_vmemmap_nr(struct dev_pagemap *pgmap)
return 1 << pgmap->vmemmap_shift;
}
static inline bool folio_is_device_private(const struct folio *folio)
{
return IS_ENABLED(CONFIG_DEVICE_PRIVATE) &&
folio_is_zone_device(folio) &&
folio->pgmap->type == MEMORY_DEVICE_PRIVATE;
}
static inline bool is_device_private_page(const struct page *page)
{
return IS_ENABLED(CONFIG_DEVICE_PRIVATE) &&
is_zone_device_page(page) &&
page_pgmap(page)->type == MEMORY_DEVICE_PRIVATE;
}
static inline bool folio_is_device_private(const struct folio *folio)
{
return is_device_private_page(&folio->page);
folio_is_device_private(page_folio(page));
}
static inline bool is_pci_p2pdma_page(const struct page *page)