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mm: use zone lock guard in put_page_back_buddy()

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Use spinlock_irqsave zone lock guard in put_page_back_buddy() to replace
the explicit lock/unlock pattern with automatic scope-based cleanup.

Link: https://lore.kernel.org/b0fceedca37139da36aa626ac72eb9840b641021.1777462630.git.d@ilvokhin.com
Signed-off-by: Dmitry Ilvokhin <d@ilvokhin.com>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Dmitry Ilvokhin
2026-04-29 12:02:11 +00:00
committed by Andrew Morton
parent ee8a0c15c2
commit 5e22451096
1 changed files with 4 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
mm/page_alloc.c
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@@ -7675,23 +7675,19 @@ bool take_page_off_buddy(struct page *page)
bool put_page_back_buddy(struct page *page)
{
struct zone *zone = page_zone(page);
unsigned long flags;
bool ret = false;
spin_lock_irqsave(&zone->lock, flags);
guard(spinlock_irqsave)(&zone->lock);
if (put_page_testzero(page)) {
unsigned long pfn = page_to_pfn(page);
int migratetype = get_pfnblock_migratetype(page, pfn);
ClearPageHWPoisonTakenOff(page);
__free_one_page(page, pfn, zone, 0, migratetype, FPI_NONE);
if (TestClearPageHWPoison(page)) {
ret = true;
}
if (TestClearPageHWPoison(page))
return true;
}
spin_unlock_irqrestore(&zone->lock, flags);
return ret;
return false;
}
#endif