The patch titled
Subject: mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4
has been added to the -mm tree. Its filename is
mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4.patch
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------------------------------------------------------
From: Zi Yan <ziy@xxxxxxxxxx>
Subject: mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4
updates per David
Link: https://lkml.kernel.org/r/20220401230804.1658207-2-zi.yan@xxxxxxxx
Link: https://lore.kernel.org/linux-mm/CAHk-=3Dwji_AmYygZMTsPMdJ7XksMt7kO=
ur8oDfDdniBRMjm4VkQ@xxxxxxxxxxxxxx/
Link: https://lkml.kernel.org/r/7236E7CA-B5F1-4C04-AB85-E86FA3E9A54B@xxxxxxxxxx
Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/internal.h | 4 ++--
mm/page_alloc.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/mm/internal.h~mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4
+++ a/mm/internal.h
@@ -252,7 +252,7 @@ static inline unsigned int buddy_order(s
* For recording page's order, we use page_private(page).
*/
static inline bool page_is_buddy(struct page *page, struct page *buddy,
- unsigned int order)
+ unsigned int order)
{
if (!page_is_guard(buddy) && !PageBuddy(buddy))
return false;
@@ -312,8 +312,8 @@ __find_buddy_pfn(unsigned long page_pfn,
static inline struct page *find_buddy_page_pfn(struct page *page,
unsigned long pfn, unsigned int order, unsigned long *buddy_pfn)
{
- struct page *buddy;
unsigned long __buddy_pfn = __find_buddy_pfn(pfn, order);
+ struct page *buddy;
buddy = page + (__buddy_pfn - pfn);
if (buddy_pfn)
--- a/mm/page_alloc.c~mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4
+++ a/mm/page_alloc.c
@@ -976,8 +976,8 @@ static inline bool
buddy_merge_likely(unsigned long pfn, unsigned long buddy_pfn,
struct page *page, unsigned int order)
{
- struct page *higher_page;
unsigned long higher_page_pfn;
+ struct page *higher_page;
if (order >= MAX_ORDER - 2)
return false;
_
Patches currently in -mm which might be from ziy@xxxxxxxxxx are
mm-migrate-use-thp_order-instead-of-hpage_pmd_order-for-new-page-allocation.patch
mm-page_alloc-simplify-pageblock-migratetype-check-in-__free_one_page.patch
mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation.patch
mm-wrap-__find_buddy_pfn-with-a-necessary-buddy-page-validation-v4.patch
