From patchwork Wed Dec 6 06:47:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaitanya Kumar Borah X-Patchwork-Id: 13481107 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 02C99C4167B for ; Wed, 6 Dec 2023 06:51:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 47CC010E680; Wed, 6 Dec 2023 06:51:13 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by gabe.freedesktop.org (Postfix) with ESMTPS id AB1F310E67D for ; Wed, 6 Dec 2023 06:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701845471; x=1733381471; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=BWFvxcD5fMdLITlccgGXJvKAZSlkvK+8GpLb/ChGh14=; b=JcpEyiLNLnoI9OAllVVC4hrH7yKbh+EOXWg789YNDRHclxOVevf4aT1b 5Z0ILpJPnjAz+UoKF+KKAR9YutBeKx7TwmZdeq6VTZsRr4fiVDl2WUBmX A/JpG62uIHSi+VVcU4tjjJjTnExoOnMev7mtysIzKs5p6Wa1kKqv1yRF0 s8p3Jb+q1zYvLhJZUTO7E7iZETEqhddxs8jAthq17gSAhf8nbviJ/UkQu g9rGARRjqpv42+mHx+yH4rsqXuCNBqh3sYDfIP1YNGlrPERgLLAmOTp+G 2LjP+f+c96tFV9vwK0xF/Q9jC2RdP4L+7vk2aoiBwbM2bPruYgextMLUW Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10915"; a="12731495" X-IronPort-AV: E=Sophos;i="6.04,254,1695711600"; d="scan'208";a="12731495" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Dec 2023 22:51:10 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10915"; a="894630290" X-IronPort-AV: E=Sophos;i="6.04,254,1695711600"; d="scan'208";a="894630290" Received: from dut-2a59.iind.intel.com ([10.190.239.113]) by orsmga004.jf.intel.com with ESMTP; 05 Dec 2023 22:51:08 -0800 From: Chaitanya Kumar Borah To: intel-gfx@lists.freedesktop.org Date: Wed, 6 Dec 2023 12:17:21 +0530 Message-Id: <20231206064721.1600152-1-chaitanya.kumar.borah@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Subject: [Intel-gfx] [topic/core-for-CI] Revert "debugfs: annotate debugfs handlers vs. removal with lockdep" X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Johannes Berg This reverts commit f4acfcd4deb1 ("debugfs: annotate debugfs handlers vs. removal with lockdep"), it appears to have false positives and really shouldn't have been in the -rc series with the fixes anyway. Link:https://patchwork.kernel.org/project/linux-fsdevel/patch/20231202114936.fd55431ab160.I911aa53abeeca138126f690d383a89b13eb05667@changeid/ Reference: https://gitlab.freedesktop.org/drm/intel/-/issues/9802 Signed-off-by: Johannes Berg Acked-by: Greg Kroah-Hartman Acked-by: Uma Shankar --- fs/debugfs/file.c | 10 ---------- fs/debugfs/inode.c | 7 ------- fs/debugfs/internal.h | 6 ------ 3 files changed, 23 deletions(-) diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c index a5ade8c16375..5063434be0fc 100644 --- a/fs/debugfs/file.c +++ b/fs/debugfs/file.c @@ -108,12 +108,6 @@ int debugfs_file_get(struct dentry *dentry) kfree(fsd); fsd = READ_ONCE(dentry->d_fsdata); } -#ifdef CONFIG_LOCKDEP - fsd->lock_name = kasprintf(GFP_KERNEL, "debugfs:%pd", dentry); - lockdep_register_key(&fsd->key); - lockdep_init_map(&fsd->lockdep_map, fsd->lock_name ?: "debugfs", - &fsd->key, 0); -#endif INIT_LIST_HEAD(&fsd->cancellations); mutex_init(&fsd->cancellations_mtx); } @@ -132,8 +126,6 @@ int debugfs_file_get(struct dentry *dentry) if (!refcount_inc_not_zero(&fsd->active_users)) return -EIO; - lock_map_acquire_read(&fsd->lockdep_map); - return 0; } EXPORT_SYMBOL_GPL(debugfs_file_get); @@ -151,8 +143,6 @@ void debugfs_file_put(struct dentry *dentry) { struct debugfs_fsdata *fsd = READ_ONCE(dentry->d_fsdata); - lock_map_release(&fsd->lockdep_map); - if (refcount_dec_and_test(&fsd->active_users)) complete(&fsd->active_users_drained); } diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c index e4e7fe1bd9fb..034a617cb1a5 100644 --- a/fs/debugfs/inode.c +++ b/fs/debugfs/inode.c @@ -243,10 +243,6 @@ static void debugfs_release_dentry(struct dentry *dentry) /* check it wasn't a dir (no fsdata) or automount (no real_fops) */ if (fsd && fsd->real_fops) { -#ifdef CONFIG_LOCKDEP - lockdep_unregister_key(&fsd->key); - kfree(fsd->lock_name); -#endif WARN_ON(!list_empty(&fsd->cancellations)); mutex_destroy(&fsd->cancellations_mtx); } @@ -755,9 +751,6 @@ static void __debugfs_file_removed(struct dentry *dentry) if ((unsigned long)fsd & DEBUGFS_FSDATA_IS_REAL_FOPS_BIT) return; - lock_map_acquire(&fsd->lockdep_map); - lock_map_release(&fsd->lockdep_map); - /* if we hit zero, just wait for all to finish */ if (!refcount_dec_and_test(&fsd->active_users)) { wait_for_completion(&fsd->active_users_drained); diff --git a/fs/debugfs/internal.h b/fs/debugfs/internal.h index 0c4c68cf161f..dae80c2a469e 100644 --- a/fs/debugfs/internal.h +++ b/fs/debugfs/internal.h @@ -7,7 +7,6 @@ #ifndef _DEBUGFS_INTERNAL_H_ #define _DEBUGFS_INTERNAL_H_ -#include #include struct file_operations; @@ -25,11 +24,6 @@ struct debugfs_fsdata { struct { refcount_t active_users; struct completion active_users_drained; -#ifdef CONFIG_LOCKDEP - struct lockdep_map lockdep_map; - struct lock_class_key key; - char *lock_name; -#endif /* protect cancellations */ struct mutex cancellations_mtx;