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Although pmd_present() might seem to indicate a valid and mapped pmd entry, in reality it returns true when pmd_page() points to a valid page in memory , regardless whether the pmd entry is mapped or not. Andrea Arcangeli had earlier explained [1] the required semantics for pmd_present(). This just updates the documentation for pmd_present() as required. [1] https://lore.kernel.org/lkml/20181017020930.GN30832@redhat.com/ Link: https://lkml.kernel.org/r/20221123051319.1312582-1-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mike Rapoport <rppt@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| damon | ||
| active_mm.rst | ||
| arch_pgtable_helpers.rst | ||
| balance.rst | ||
| bootmem.rst | ||
| free_page_reporting.rst | ||
| frontswap.rst | ||
| highmem.rst | ||
| hmm.rst | ||
| hugetlbfs_reserv.rst | ||
| hwpoison.rst | ||
| index.rst | ||
| ksm.rst | ||
| memory-model.rst | ||
| mmu_notifier.rst | ||
| multigen_lru.rst | ||
| numa.rst | ||
| oom.rst | ||
| overcommit-accounting.rst | ||
| page_allocation.rst | ||
| page_cache.rst | ||
| page_frags.rst | ||
| page_migration.rst | ||
| page_owner.rst | ||
| page_reclaim.rst | ||
| page_table_check.rst | ||
| page_tables.rst | ||
| physical_memory.rst | ||
| process_addrs.rst | ||
| remap_file_pages.rst | ||
| shmfs.rst | ||
| slab.rst | ||
| slub.rst | ||
| split_page_table_lock.rst | ||
| swap.rst | ||
| transhuge.rst | ||
| unevictable-lru.rst | ||
| vmalloc.rst | ||
| vmalloced-kernel-stacks.rst | ||
| vmemmap_dedup.rst | ||
| z3fold.rst | ||
| zsmalloc.rst | ||