linux-kernel - [PATCH 2/2] sysctl: remove /proc/sys/vm/nr_pdflush

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Message-Id: <1507043781-2874-3-git-send-email-axboe@kernel.dk>
Date:   Tue,  3 Oct 2017 09:16:21 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     hannes@...xchg.org, jack@...e.cz, Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 2/2] sysctl: remove /proc/sys/vm/nr_pdflush_threads

This tunable has been obsolete since 2.6.32, and writes to the
file have been failing and complaining in dmesg since then:

nr_pdflush_threads exported in /proc is scheduled for removal

That was 8 years ago. Remove the file ABI obsolete notice, and
the sysfs file.

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads | 5 -----
 kernel/sysctl.c                                           | 5 -----
 2 files changed, 10 deletions(-)
 delete mode 100644 Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads

diff --git a/Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads b/Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads
deleted file mode 100644
index b0b0eeb20fe3..000000000000
--- a/Documentation/ABI/obsolete/proc-sys-vm-nr_pdflush_threads
+++ /dev/null
@@ -1,5 +0,0 @@
-What:		/proc/sys/vm/nr_pdflush_threads
-Date:		June 2012
-Contact:	Wanpeng Li <liwp@...ux.vnet.ibm.com>
-Description: Since pdflush is replaced by per-BDI flusher, the interface of old pdflush
-             exported in /proc/sys/vm/ should be removed.
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 6648fbbb8157..a5dd8d82c253 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1345,11 +1345,6 @@ static struct ctl_table vm_table[] = {
 		.extra1		= &zero,
 	},
 	{
-		.procname       = "nr_pdflush_threads",
-		.mode           = 0444 /* read-only */,
-		.proc_handler   = pdflush_proc_obsolete,
-	},
-	{
 		.procname	= "swappiness",
 		.data		= &vm_swappiness,
 		.maxlen		= sizeof(vm_swappiness),
-- 
2.7.4