From patchwork Sat Jan 27 02:08:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kent Overstreet X-Patchwork-Id: 13533925 Received: from out-175.mta1.migadu.com (out-175.mta1.migadu.com [95.215.58.175]) (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 E88F0125A5 for ; Sat, 27 Jan 2024 02:08:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.175 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706321323; cv=none; b=TW1UjsGU69ISbDZZ+V6IO7Fmn4Qy00NfrOF8ijUkg6zhd3aJ/DgcRj2ckJqr/MCb1doMugCaa82I0/Eu8fl0UT13IkMRkCotyKD32X1C/3LwlUADhp7VEq/Nmv7h2Yplf6t4LZ+OHyc2S5KqiBin+SgoGl6K6FlgoB1NUFVS9w4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706321323; c=relaxed/simple; bh=iy4bbPlcTHR5BujKxgwpeH6pLrpzI4Fhpz5iOUvrDBk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ecgHV5zhjCfiX09MMka+dTLLknlgM6i0zOLBUT4u8C39y+C9ctfHmyu03ETmnPSvQQ3+3N6n1FUkd4IkpPJynrNQnBX7g3w8xhjHIDFc27mWRXuFEqPPhM62ltHcEH6EdlLuU1bE1MtwRb+S4ImnlYS1hKmoJyvyuCj2NJqaBqM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=OSEMzeJT; arc=none smtp.client-ip=95.215.58.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="OSEMzeJT" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1706321320; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=3mxHfQelYlqL6oP1Hnoe6QZezCLAhWkLAbAnrEYZUDY=; b=OSEMzeJTWSmablzulvFvVfNX5hGQRamLGo2HX4EUeO9P2OMLBXPodf+HaSi4Ws2B10k6FB LFdSHAH/6v9tW82PDrv8NhWtuj3XCcRtl9PWY27sYpY2Lbr7fmLbShK9BjrQyPNEZ5BKeG R6aEmWU7ZAd9wBrxp91RNt6GZyYPJP0= From: Kent Overstreet To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Kent Overstreet , peterz@infradead.org, boqun.feng@gmail.com Subject: [PATCH 0/4] lockdep cmp fn conversions Date: Fri, 26 Jan 2024 21:08:27 -0500 Message-ID: <20240127020833.487907-1-kent.overstreet@linux.dev> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT rationale: *_lock_nested() is fundamentally broken - in order for lockdep to work we need to be able to check that we're following some defined ordering, and it's not possible to define a total ordering of an arbitrary number of objects with only a small fixed size enum. so it needs to go. awhile back I added the ability to set a comparison function for a lock class, and this is the start of hopefully a slow steady trickle of patches as time allows to convert code to use it. Kent Overstreet (4): fs/pipe: Convert to lockdep_cmp_fn pktcdvd: kill mutex_lock_nested() usage net: Convert sk->sk_peer_lock to lock_set_cmp_fn_ptr_order() af_unix: convert to lock_cmp_fn drivers/block/pktcdvd.c | 8 ++--- fs/pipe.c | 77 ++++++++++++++++------------------------ include/linux/lockdep.h | 3 ++ include/net/af_unix.h | 3 -- kernel/locking/lockdep.c | 6 ++++ net/core/sock.c | 1 + net/unix/af_unix.c | 24 ++++++------- net/unix/diag.c | 2 +- 8 files changed, 55 insertions(+), 69 deletions(-)