Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\page-flags.h Create Date:2022-07-28 05:37:12
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:PageTransCompoundMap is the same as PageTransCompound, but it also* guarantees the primary MMU has the entire compound page mapped* through pmd_trans_huge, which in turn guarantees the secondary MMUs* can also map the entire compound page

Proto:static inline int PageTransCompoundMap(struct page *page)

Type:int

Parameter:

TypeParameterName
struct page *page
637  If Not PageTransCompound returns true for both transparent huge pages* and hugetlbfs pages, so it should only be called when it's known* that hugetlbfs pages aren't involved. Then Return 0
640  If PageAnon(page) Then Return atomic_read( & * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table.) < 0
643  head = compound_head(page)
645  Return atomic_read( & * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table.) == atomic_read(compound_mapcount_ptr(head))