Return-Path: Received: from mailout3.samsung.com ([203.254.224.33]:11926 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730795AbfAIPdl (ORCPT ); Wed, 9 Jan 2019 10:33:41 -0500 From: Kanchan Joshi To: linux-fsdevel@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nvme@lists.infradead.org, jack@suse.com, david@fromorbit.com, tytso@mit.edu, prakash.v@samsung.com, Kanchan Joshi Subject: [PATCH 2/4] fs: introduce four macros for in-kernel hints Date: Wed, 09 Jan 2019 21:00:59 +0530 Message-id: <1547047861-7271-3-git-send-email-joshi.k@samsung.com> In-reply-to: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> References: <1547047861-7271-1-git-send-email-joshi.k@samsung.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: Exiting write-hints are exposed to user-mode. There is a possiblity of conflict if kernel happens to use those. This patch introduces four write-hints for exclusive kernel-mode use. Signed-off-by: Kanchan Joshi --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 811c777..e8548eb 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -291,6 +291,11 @@ enum rw_hint { WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM, WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG, WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME, +/* below ones are meant for in-kernel use */ + KERN_WRITE_LIFE_SHORT, + KERN_WRITE_LIFE_MEDIUM, + KERN_WRITE_LIFE_LONG, + KERN_WRITE_LIFE_EXTREME }; #define IOCB_EVENTFD (1 << 0) -- 2.7.4