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-rw-r--r--kernel/sysctl.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 7cb1ac3e6fff..d0b47b859067 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -84,8 +84,11 @@ extern int sysctl_stat_interval;
extern int latencytop_enabled;
/* Constants used for minimum and maximum */
-#ifdef CONFIG_DETECT_SOFTLOCKUP
+#if defined(CONFIG_DETECT_SOFTLOCKUP) || defined(CONFIG_HIGHMEM)
static int one = 1;
+#endif
+
+#ifdef CONFIG_DETECT_SOFTLOCKUP
static int sixty = 60;
#endif
@@ -1150,6 +1153,19 @@ static struct ctl_table vm_table[] = {
.extra1 = &zero,
},
#endif
+#ifdef CONFIG_HIGHMEM
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "highmem_is_dirtyable",
+ .data = &vm_highmem_is_dirtyable,
+ .maxlen = sizeof(vm_highmem_is_dirtyable),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
+#endif
/*
* NOTE: do not add new entries to this table unless you have read
* Documentation/sysctl/ctl_unnumbered.txt