Fix leaks on /proc/{*/sched,sched_debug,timer_list,timer_stats}

On every open/close one struct seq_operations leaks.
Kudos to /proc/slab_allocators.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/base.c

@@ -927,7 +927,7 @@ static const struct file_operations proc_pid_sched_operations = {
 	.read		= seq_read,
 	.write		= sched_write,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 #endif

kernel/sched_debug.c

@@ -200,7 +200,7 @@ static struct file_operations sched_debug_fops = {
 	.open		= sched_debug_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 static int __init init_sched_debug_procfs(void)

kernel/time/timer_list.c

@@ -267,7 +267,7 @@ static struct file_operations timer_list_fops = {
 	.open		= timer_list_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 static int __init init_timer_list_procfs(void)

kernel/time/timer_stats.c

@@ -399,7 +399,7 @@ static struct file_operations tstats_fops = {
 	.read		= seq_read,
 	.write		= tstats_write,
 	.llseek		= seq_lseek,
-	.release	= seq_release,
+	.release	= single_release,
 };
 
 void __init init_timer_stats(void)