linux-kernel - [PATCH 2/2] docs: proc: update documentation about subset= parameter

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Message-Id: <20200604200413.587896-3-gladkov.alexey@gmail.com>
Date:   Thu,  4 Jun 2020 22:04:13 +0200
From:   Alexey Gladkov <gladkov.alexey@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Alexey Gladkov <legion@...nel.org>,
        Andy Lutomirski <luto@...nel.org>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH 2/2] docs: proc: update documentation about subset= parameter

Signed-off-by: Alexey Gladkov <gladkov.alexey@...il.com>
---
 Documentation/filesystems/proc.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index e2ecf248feb5..68acd335cd8c 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -2177,6 +2177,12 @@ information about processes information, just add identd to this group.
 subset=pid hides all top level files and directories in the procfs that
 are not related to tasks.
 
+subset=NAME[:NAME...] allows to give access to the listed file names or
+directories located at the top level of procfs. These files and directories
+do not have to be present at the time of mounting procfs. They may appear later
+when the kernel module that creates them loads. The list of names can be
+combined with subst=pid.
+
 5	Filesystem behavior
 ----------------------------
 
-- 
2.25.4