From nobody Thu Apr 2 17:10:50 2026 Received: from mail.ilvokhin.com (mail.ilvokhin.com [178.62.254.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E72A134B191 for ; Fri, 27 Mar 2026 16:15:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.62.254.231 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628118; cv=none; b=QsoDnvMAGWDVim2IA8AVQa+o1fhdorsZfvNCkGnZFj0aICZRNfls1PKrXCmtEfaRTrVsmQLPicvnIDWvPDRSPptKtzsSakrGVKl1EIq+yHYy7RLFJbuDZIhESWTHyAbfaEtKdW83HjBl051RJtt2Jo7L8XCXx21TlmoVIa02MFI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774628118; c=relaxed/simple; bh=r3Vw9o/WtMzfNPiv9ETNjj8oUtjDklIrBU1BS23UqPs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LNysIR1UJwRyRyOtRAGJALGN48m9PvovbfAvGs8uorQVnlKZtZ/6AdWf4/MR9pfOzWK5QOmbWV06VJY7rV1AU/qVnnbKvi0MSLUnCGI7vMi+sHR3xXO9KT2t+anyFlOds0JhJrgClbpYK5XWmouHhFGuHM1xS9R2egf/Arfsqiw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=ilvokhin.com; spf=pass smtp.mailfrom=ilvokhin.com; dkim=pass (1024-bit key) header.d=ilvokhin.com header.i=@ilvokhin.com header.b=JQ+Y2zVT; arc=none smtp.client-ip=178.62.254.231 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=ilvokhin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ilvokhin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ilvokhin.com header.i=@ilvokhin.com header.b="JQ+Y2zVT" Received: from localhost.localdomain (shell.ilvokhin.com [138.68.190.75]) (Authenticated sender: d@ilvokhin.com) by mail.ilvokhin.com (Postfix) with ESMTPSA id 35EE5BE002; Fri, 27 Mar 2026 16:15:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ilvokhin.com; s=mail; t=1774628107; bh=Z9Gu9mdbn4w3OqiiQpAxHR+GJdxY31abyFRKRvHJHmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=JQ+Y2zVT21zzVsEdJDO6n9/TzQL8kdbVKmhbkqMNdtsDuCfRIsmAclilW8PALhluk o21YSxJFVe8VoUBxrxbgKOqVsbjvkBmvo1oenJJ3l3N7oRaMagkmPzJW4cPURQHKV1 lh98lNTv9xmPXEsr6HbHW5ho8Va4S1fnvVJNhv6w= From: Dmitry Ilvokhin To: Andrew Morton , Vlastimil Babka , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, Dmitry Ilvokhin , Steven Rostedt Subject: [PATCH v2 6/8] mm: use zone lock guard in put_page_back_buddy() Date: Fri, 27 Mar 2026 16:14:46 +0000 Message-ID: <1a4085f7ed0adee75bd09b683cf50e612222c8a4.1774627568.git.d@ilvokhin.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use spinlock_irqsave zone lock guard in put_page_back_buddy() to replace the explicit lock/unlock pattern with automatic scope-based cleanup. Suggested-by: Steven Rostedt Signed-off-by: Dmitry Ilvokhin --- mm/page_alloc.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a124e4eebda4..dd13aa197456 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7519,23 +7519,19 @@ bool take_page_off_buddy(struct page *page) bool put_page_back_buddy(struct page *page) { struct zone *zone =3D page_zone(page); - unsigned long flags; - bool ret =3D false; =20 - spin_lock_irqsave(&zone->lock, flags); + guard(spinlock_irqsave)(&zone->lock); if (put_page_testzero(page)) { unsigned long pfn =3D page_to_pfn(page); int migratetype =3D get_pfnblock_migratetype(page, pfn); =20 ClearPageHWPoisonTakenOff(page); __free_one_page(page, pfn, zone, 0, migratetype, FPI_NONE); - if (TestClearPageHWPoison(page)) { - ret =3D true; - } + if (TestClearPageHWPoison(page)) + return true; } - spin_unlock_irqrestore(&zone->lock, flags); =20 - return ret; + return false; } #endif =20 --=20 2.52.0