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.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 5 deletions

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),