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mm: Turn head_compound_mapcount() into folio_entire_mapcount()

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Adjust documentation to be more clear.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Matthew Wilcox (Oracle)
2022-01-18 10:50:48 -05:00
parent e20c41b109
commit 74e8ee4708
2 changed files with 15 additions and 8 deletions
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6
mm/debug.c
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@@ -48,7 +48,8 @@ const struct trace_print_flags vmaflag_names[] = {
static void __dump_page(struct page *page)
{
struct page *head = compound_head(page);
struct folio *folio = page_folio(page);
struct page *head = &folio->page;
struct address_space *mapping;
bool compound = PageCompound(page);
/*
@@ -76,6 +77,7 @@ static void __dump_page(struct page *page)
else
mapping = (void *)(tmp & ~PAGE_MAPPING_FLAGS);
head = page;
folio = (struct folio *)page;
compound = false;
} else {
mapping = page_mapping(page);
@@ -94,7 +96,7 @@ static void __dump_page(struct page *page)
if (compound) {
pr_warn("head:%p order:%u compound_mapcount:%d compound_pincount:%d\n",
head, compound_order(head),
head_compound_mapcount(head),
folio_entire_mapcount(folio),
head_compound_pincount(head));
}