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mm: introduce memdesc_zonenum()

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Remove a conversion from folio to page by passing the folio->flags (which
are a copy of the page->flags) to the new memdesc_zonenum() function.

Link: https://lkml.kernel.org/r/20250805172307.1302730-5-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 18:22:54 +01:00 committed by Andrew Morton
parent eb00fdd84d
commit 4aff03fbe5
1 changed files with 8 additions and 3 deletions
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11
include/linux/mmzone.h
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@ -1183,15 +1183,20 @@ static inline bool zone_is_empty(struct zone *zone)
#define KASAN_TAG_MASK ((1UL << KASAN_TAG_WIDTH) - 1)
#define ZONEID_MASK ((1UL << ZONEID_SHIFT) - 1)
static inline enum zone_type memdesc_zonenum(memdesc_flags_t flags)
{
ASSERT_EXCLUSIVE_BITS(flags.f, ZONES_MASK << ZONES_PGSHIFT);
return (flags.f >> ZONES_PGSHIFT) & ZONES_MASK;
}
static inline enum zone_type page_zonenum(const struct page *page)
{
ASSERT_EXCLUSIVE_BITS(page->flags, ZONES_MASK << ZONES_PGSHIFT);
return (page->flags.f >> ZONES_PGSHIFT) & ZONES_MASK;
return memdesc_zonenum(page->flags);
}
static inline enum zone_type folio_zonenum(const struct folio *folio)
{
return page_zonenum(&folio->page);
return memdesc_zonenum(folio->flags);
}
#ifdef CONFIG_ZONE_DEVICE