linux-kernel - [PATCH] sysctl: wire up ->splice_read and ->splice

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Message-Id: <20200904164805.1799256-1-hch@lst.de>
Date:   Fri,  4 Sep 2020 18:48:05 +0200
From:   Christoph Hellwig <hch@....de>
To:     viro@...iv.linux.org.uk
Cc:     mcgrof@...nel.org, keescook@...omium.org, yzaikin@...gle.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH] sysctl: wire up ->splice_read and ->splice_write

Make sure the kernel_write that the init code uses to apply sysctl
values from the kernel command line keeps working without set_fs().

Signed-off-by: Christoph Hellwig <hch@....de>
---

This could be folded into "sysctl: Convert to iter interfaces".

 fs/proc/proc_sysctl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index a4a3122f8a584a..317899222d7fdf 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -853,6 +853,8 @@ static const struct file_operations proc_sys_file_operations = {
 	.poll		= proc_sys_poll,
 	.read_iter	= proc_sys_read,
 	.write_iter	= proc_sys_write,
+	.splice_read	= generic_file_splice_read,
+	.splice_write	= iter_file_splice_write,
 	.llseek		= default_llseek,
 };
 
-- 
2.28.0