From nobody Sat Feb 7 18:21:13 2026 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 67BC92DC76C for ; Wed, 21 Jan 2026 04:03:04 +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=1768968184; cv=none; b=TnwUzmDxd4HxU/MI7OgJnbDGLnxykVj4lYvIOuVaB1XC3jTo0rgNVNKMsaZTZq41OwzZOaTq5D2EH0jreC5+v7iecxauyDDx2NgPrCjZkpAsx7CwTDEr9p7RsA7BzXqO2iWilrIAojfnpClmUZ8dVCPW7WjdDQlvbyHgEjCI2Tc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768968184; c=relaxed/simple; bh=9FMU/0gVE5XVeAUrmRg5t1E7qqvswTQijoIK4T/cDuU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=gMUU9mRAaDzWQlZY/GegmP1PRXYtKHPg0ULMadg8G021PK6T3Mvcbz0QPoTW64Q+MltYqJdcNF1MwVADZSLvHVkbI5V3ThhSUpOr31wrpiYTDcGTtu38c8Iv8B2dmB/iUwjcG32SWRt54zSY0BfKSugwWnl9MtqERrQ1cLZVLDg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oqnzJ5tW; 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="oqnzJ5tW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0C6FC116D0; Wed, 21 Jan 2026 04:03:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768968181; bh=9FMU/0gVE5XVeAUrmRg5t1E7qqvswTQijoIK4T/cDuU=; h=From:To:Cc:Subject:Date:From; b=oqnzJ5tWTVr5ADpACK8+3lW6CHLUWIcpkzB/9Sn1QYcafQaxjbfp5FAjxgLs1xrYV 682guHRFWD+Zr/8MB3/qedS4YjCWhhbWdHBKgpV77rxZ7uTDFnaol/OoyFWc/8GOWL JflP59bYvq5SjaBhRjLLoyFoIEZLW+NyW4sXnXtsMelyTYJZ1yCPmVGCg8UHkAoQV/ O99mq55qZ4Y+gwdsvQcYy6cA3frIcOS/OcY4Dzv51yv6uG5VISLHf7IskHqe1yIjrA yNbgp6yztkypnXQH1hBZJZtBylIqs0vXrNSAQxqSBPAtBONmIw2QR1Mb9LVOPkOLNG 7TDVc++8ri9+w== From: Tzung-Bi Shih To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: linux-kernel@vger.kernel.org, tzungbi@kernel.org, Bartosz Golaszewski Subject: [PATCH] revocable: Remove redundant synchronize_srcu() call Date: Wed, 21 Jan 2026 04:02:04 +0000 Message-ID: <20260121040204.2699886-1-tzungbi@kernel.org> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog 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" When allocating a revocable provider via revocable_provider_alloc(), there is no revocable consumers (i.e., RCU readers) yet. Remove the redundant synchronize_srcu() call to save cycles. Signed-off-by: Tzung-Bi Shih --- To address the performance impact reported in https://lore.kernel.org/linux-gpio/CAMRc=3DMcrFa42mNWmZtD1HKKKZ+USUKpQAAME5= 0wbfxPM7L72gA@mail.gmail.com/. drivers/base/revocable.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/base/revocable.c b/drivers/base/revocable.c index f6cece275aac..b068e18a847d 100644 --- a/drivers/base/revocable.c +++ b/drivers/base/revocable.c @@ -99,7 +99,6 @@ struct revocable_provider *revocable_provider_alloc(void = *res) =20 init_srcu_struct(&rp->srcu); rcu_assign_pointer(rp->res, res); - synchronize_srcu(&rp->srcu); kref_init(&rp->kref); =20 return rp; --=20 2.52.0.457.g6b5491de43-goog