From nobody Thu Oct 2 20:42:56 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 152971D54E3; Fri, 12 Sep 2025 02:39:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757644797; cv=none; b=gOVr0N3Pz/Oz/cK/CDTY+tZgIX1L4wrmFxLvJ35uqYRXSlRaAZwM7Vbji+sDIf2A2rNZ8HSHvgYSnZjdl3htQB9aEYG6X3tOyxooEz2DiPlekKPrvvfcR/IUGv1okk7MOJ0olT22m/UaOr91FUyDOdgoTzsdUl6hH1EPGQBHCTc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757644797; c=relaxed/simple; bh=jSyChxhp2q57cPUh41M0fEVHkYfztaaT3v+fVBcDkyE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=DNmJSbCJrta81Ci6WOXYp4TYhsMMzI3xweAX+uspMWdf9HQa6gzcDDkkVuaum6P8v1QeLMMCH5IjqUtdFs1RAJSmv54qPdvdcoLbCAxVQu3ePogiCDodLVQm54vr6bOp4PUaBuy3r2e+jVSgCZdGEF6Bm0B1QEv8orf3cJxrrHc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pIZejVwd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pIZejVwd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C407EC4CEF5; Fri, 12 Sep 2025 02:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757644796; bh=jSyChxhp2q57cPUh41M0fEVHkYfztaaT3v+fVBcDkyE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pIZejVwd7XS4Ox9Am4KGnyKBX3HhSNWV+MeIMCEHwd+JisNA8vBa+ZoK/xxPCS566 NtoaYCUPFFoYgYs7gkzrx4XBtTfEjQYdXf+O5Zj85rWQBJk2nnEmQAIV0qvmMS1NhW YhYLy1w4PGuqxbyn1HyR2OA6DoKZdie75UduINMCXVwfpKZ6jh3vVBHWQkPcLFXJoS exO532i/QkVnkBu/8B1xOeYqKqZFUiHlvfVzHQevIw5WSuFdinlIjwDDQsuclhYPgT otf7PQvW9yeN4NGD6cCozpavPfP7/QLxd9OmlMIbPdq20xiMfsvoK14UxlfPRAysex 2PyMn7solWsag== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 4/7] mm/damon/lru_sort: use damon_initialized() Date: Thu, 11 Sep 2025 19:39:43 -0700 Message-Id: <20250912023946.62337-5-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250912023946.62337-1-sj@kernel.org> References: <20250912023946.62337-1-sj@kernel.org> 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" DAMON_LRU_SORT is assuming DAMON is ready to use in module_init time, and uses its own hack to see if it is the time. Use damon_initialized(), which is a way for seeing if DAMON is ready to be used that is more reliable and better to maintain instead of the hack. Signed-off-by: SeongJae Park --- mm/damon/lru_sort.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c index ab6173a646bd..42b9a656f9de 100644 --- a/mm/damon/lru_sort.c +++ b/mm/damon/lru_sort.c @@ -345,7 +345,7 @@ static int damon_lru_sort_enabled_store(const char *val, return 0; =20 /* Called before init function. The function will handle this. */ - if (!ctx) + if (!damon_initialized()) goto set_param_out; =20 err =3D damon_lru_sort_turn(enable); @@ -368,8 +368,13 @@ MODULE_PARM_DESC(enabled, =20 static int __init damon_lru_sort_init(void) { - int err =3D damon_modules_new_paddr_ctx_target(&ctx, &target); + int err; =20 + if (!damon_initialized()) { + err =3D -ENOMEM; + goto out; + } + err =3D damon_modules_new_paddr_ctx_target(&ctx, &target); if (err) goto out; =20 --=20 2.39.5