linux-kernel - FAILED: Patch "fs: warn about impending deprecation of mandatory locks" failed to apply to 4.4-stable tree

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Date:   Mon, 23 Aug 2021 22:59:02 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     stable@...r.kernel.org, jlayton@...nel.org
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: FAILED: Patch "fs: warn about impending deprecation of mandatory locks" failed to apply to 4.4-stable tree

The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@...r.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

>From fdd92b64d15bc4aec973caa25899afd782402e68 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@...nel.org>
Date: Fri, 20 Aug 2021 09:29:50 -0400
Subject: [PATCH] fs: warn about impending deprecation of mandatory locks

We've had CONFIG_MANDATORY_FILE_LOCKING since 2015 and a lot of distros
have disabled it. Warn the stragglers that still use "-o mand" that
we'll be dropping support for that mount option.

Cc: stable@...r.kernel.org
Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 fs/namespace.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/namespace.c b/fs/namespace.c
index ab4174a3c802..2279473d0d6f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1716,8 +1716,12 @@ static inline bool may_mount(void)
 }
 
 #ifdef	CONFIG_MANDATORY_FILE_LOCKING
-static inline bool may_mandlock(void)
+static bool may_mandlock(void)
 {
+	pr_warn_once("======================================================\n"
+		     "WARNING: the mand mount option is being deprecated and\n"
+		     "         will be removed in v5.15!\n"
+		     "======================================================\n");
 	return capable(CAP_SYS_ADMIN);
 }
 #else
-- 
2.30.2