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mm: rename page_order() to buddy_order()

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The current page_order() can only be called on pages in the buddy
allocator.  For compound pages, you have to use compound_order().  This is
confusing and led to a bug, so rename page_order() to buddy_order().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20201001152259.14932-2-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2020-10-15 20:10:15 -07:00
committed by Linus Torvalds
parent 1f0f8c0de0
commit ab130f9108
7 changed files with 29 additions and 29 deletions
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6
mm/page_owner.c
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@@ -295,7 +295,7 @@ void pagetypeinfo_showmixedcount_print(struct seq_file *m,
if (PageBuddy(page)) {
unsigned long freepage_order;
freepage_order = page_order_unsafe(page);
freepage_order = buddy_order_unsafe(page);
if (freepage_order < MAX_ORDER)
pfn += (1UL << freepage_order) - 1;
continue;
@@ -490,7 +490,7 @@ read_page_owner(struct file *file, char __user *buf, size_t count, loff_t *ppos)
page = pfn_to_page(pfn);
if (PageBuddy(page)) {
unsigned long freepage_order = page_order_unsafe(page);
unsigned long freepage_order = buddy_order_unsafe(page);
if (freepage_order < MAX_ORDER)
pfn += (1UL << freepage_order) - 1;
@@ -584,7 +584,7 @@ static void init_pages_in_zone(pg_data_t *pgdat, struct zone *zone)
* heavy lock contention.
*/
if (PageBuddy(page)) {
unsigned long order = page_order_unsafe(page);
unsigned long order = buddy_order_unsafe(page);
if (order > 0 && order < MAX_ORDER)
pfn += (1UL << order) - 1;