1 files changed, 8 insertions, 21 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 49e13e1f8fe6..74f5b580fe34 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -112,9 +112,6 @@ extern int sysctl_nr_open_min, sysctl_nr_open_max;
 #ifndef CONFIG_MMU
 extern int sysctl_nr_trim_pages;
 #endif
-#ifdef CONFIG_BLOCK
-extern int blk_iopoll_enabled;
-#endif
 
 /* Constants used for minimum and  maximum */
 #ifdef CONFIG_LOCKUP_DETECTOR
@@ -126,7 +123,7 @@ static int __maybe_unused neg_one = -1;
 static int zero;
 static int __maybe_unused one = 1;
 static int __maybe_unused two = 2;
-static int __maybe_unused three = 3;
+static int __maybe_unused four = 4;
 static unsigned long one_ul = 1;
 static int one_hundred = 100;
 #ifdef CONFIG_PRINTK
@@ -144,6 +141,11 @@ static int min_percpu_pagelist_fract = 8;
 static int ngroups_max = NGROUPS_MAX;
 static const int cap_last_cap = CAP_LAST_CAP;
 
+/*this is needed for proc_doulongvec_minmax of sysctl_hung_task_timeout_secs */
+#ifdef CONFIG_DETECT_HUNG_TASK
+static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
+#endif
+
 #ifdef CONFIG_INOTIFY_USER
 #include <linux/inotify.h>
 #endif
@@ -386,13 +388,6 @@ static struct ctl_table kern_table[] = {
                 .proc_handler   = proc_dointvec,
         },
         {
-                .procname       = "numa_balancing_migrate_deferred",
-                .data           = &sysctl_numa_balancing_migrate_deferred,
-                .maxlen         = sizeof(unsigned int),
-                .mode           = 0644,
-                .proc_handler   = proc_dointvec,
-        },
-        {
                 .procname       = "numa_balancing",
                 .data           = NULL, /* filled in by handler */
                 .maxlen         = sizeof(unsigned int),
@@ -995,6 +990,7 @@ static struct ctl_table kern_table[] = {
                 .maxlen         = sizeof(unsigned long),
                 .mode           = 0644,
                 .proc_handler   = proc_dohung_task_timeout_secs,
+                .extra2         = &hung_task_timeout_max,
         },
         {
                 .procname       = "hung_task_warnings",
@@ -1094,15 +1090,6 @@ static struct ctl_table kern_table[] = {
                 .proc_handler   = proc_dointvec,
         },
 #endif
-#ifdef CONFIG_BLOCK
-        {
-                .procname       = "blk_iopoll",
-                .data           = &blk_iopoll_enabled,
-                .maxlen         = sizeof(int),
-                .mode           = 0644,
-                .proc_handler   = proc_dointvec,
-        },
-#endif
         { }
 };
 
@@ -1283,7 +1270,7 @@ static struct ctl_table vm_table[] = {
                 .mode           = 0644,
                 .proc_handler   = drop_caches_sysctl_handler,
                 .extra1         = &one,
-                .extra2         = &three,
+                .extra2         = &four,
         },
 #ifdef CONFIG_COMPACTION
         {