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mm: use zone lock guard in __offline_isolated_pages()

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

Link: https://lore.kernel.org/13149be4f8151e18eb5f1eb4f3241ab3cffb373e.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 12:02:13 +00:00 committed by Andrew Morton
parent 5ad64655dd
commit 95b8e43226
1 changed files with 2 additions and 3 deletions
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5
mm/page_alloc.c
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@ -7531,7 +7531,7 @@ void zone_pcp_reset(struct zone *zone)
unsigned long __offline_isolated_pages(unsigned long start_pfn,
unsigned long end_pfn)
{
unsigned long already_offline = 0, flags;
unsigned long already_offline = 0;
unsigned long pfn = start_pfn;
struct page *page;
struct zone *zone;
@ -7539,7 +7539,7 @@ unsigned long __offline_isolated_pages(unsigned long start_pfn,
offline_mem_sections(pfn, end_pfn);
zone = page_zone(pfn_to_page(pfn));
spin_lock_irqsave(&zone->lock, flags);
guard(spinlock_irqsave)(&zone->lock);
while (pfn < end_pfn) {
page = pfn_to_page(pfn);
/*
@ -7569,7 +7569,6 @@ unsigned long __offline_isolated_pages(unsigned long start_pfn,
del_page_from_free_list(page, zone, order, MIGRATE_ISOLATE);
pfn += (1 << order);
}
spin_unlock_irqrestore(&zone->lock, flags);
return end_pfn - start_pfn - already_offline;
}