--- a/module/spl/spl-proc.c	
+++ a/module/spl/spl-proc.c	
@@ -37,6 +37,12 @@ 
 
 #define SS_DEBUG_SUBSYS SS_PROC
 
+#ifdef CONSTIFY_PLUGIN
+typedef struct ctl_table __no_const spl_ctl_table;
+#else
+typedef struct ctl_table spl_ctl_table;
+#endif
+
 #ifdef DEBUG_KMEM
 static unsigned long table_min = 0;
 static unsigned long table_max = ~0;
@@ -323,7 +329,7 @@ enum {
 SPL_PROC_HANDLER(proc_console_max_delay_cs)
 {
         int rc, max_delay_cs;
-        struct ctl_table dummy = *table;
+        spl_ctl_table dummy = *table;
         long d;
 	SENTRY;
 
@@ -355,7 +361,7 @@ enum {
 SPL_PROC_HANDLER(proc_console_min_delay_cs)
 {
         int rc, min_delay_cs;
-        struct ctl_table dummy = *table;
+        spl_ctl_table dummy = *table;
         long d;
 	SENTRY;
 
@@ -387,7 +393,7 @@ enum {
 SPL_PROC_HANDLER(proc_console_backoff)
 {
         int rc, backoff;
-        struct ctl_table dummy = *table;
+        spl_ctl_table dummy = *table;
 	SENTRY;
 
         dummy.data = &backoff;
@@ -417,7 +423,7 @@ enum {
 {
         int rc = 0;
         unsigned long min = 0, max = ~0, val;
-        struct ctl_table dummy = *table;
+        spl_ctl_table dummy = *table;
 	SENTRY;
 
         dummy.data = &val;
@@ -444,7 +450,7 @@ enum {
 {
         int rc = 0;
         unsigned long min = 0, max = ~0, val = 0, mask;
-        struct ctl_table dummy = *table;
+        spl_ctl_table dummy = *table;
         spl_kmem_cache_t *skc;
         SENTRY;
 
--