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mm: Convert page_vma_mapped_walk to work on PFNs

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page_mapped_in_vma() really just wants to walk one page, but as the
code stands, if passed the head page of a compound page, it will
walk every page in the compound page.  Extract pfn/nr_pages/pgoff
from the struct page early, so they can be overridden by
page_mapped_in_vma().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-02-03 11:40:17 -05:00
parent aef13dec0a
commit 2aff7a4755
6 changed files with 58 additions and 50 deletions
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5
include/linux/hugetlb.h
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@ -970,6 +970,11 @@ static inline struct hstate *page_hstate(struct page *page)
return NULL;
}
static inline struct hstate *size_to_hstate(unsigned long size)
{
return NULL;
}
static inline unsigned long huge_page_size(struct hstate *h)
{
return PAGE_SIZE;