proc: move /proc/buddyinfo boilerplate to mm/vmstat.c

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

1 files changed, 21 insertions, 4 deletions

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 9343227c5c60..f45d7245a282 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -8,7 +8,7 @@
  *  Copyright (C) 2006 Silicon Graphics, Inc.,
  *              Christoph Lameter <christoph@lameter.com>
  */
-
+#include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/module.h>
@@ -384,7 +384,7 @@ void zone_statistics(struct zone *preferred_zone, struct zone *z)
 #endif
 
 #ifdef CONFIG_PROC_FS
-
+#include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 
 static char * const migratetype_names[MIGRATE_TYPES] = {
@@ -581,13 +581,25 @@ static int pagetypeinfo_show(struct seq_file *m, void *arg)
         return 0;
 }
 
-const struct seq_operations fragmentation_op = {
+static const struct seq_operations fragmentation_op = {
         .start  = frag_start,
         .next   = frag_next,
         .stop   = frag_stop,
         .show   = frag_show,
 };
 
+static int fragmentation_open(struct inode *inode, struct file *file)
+{
+        return seq_open(file, &fragmentation_op);
+}
+
+static const struct file_operations fragmentation_file_operations = {
+        .open           = fragmentation_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = seq_release,
+};
+
 const struct seq_operations pagetypeinfo_op = {
         .start  = frag_start,
         .next   = frag_next,
@@ -898,9 +910,11 @@ static int __cpuinit vmstat_cpuup_callback(struct notifier_block *nfb,
 
 static struct notifier_block __cpuinitdata vmstat_notifier =
         { &vmstat_cpuup_callback, NULL, 0 };
+#endif
 
 static int __init setup_vmstat(void)
 {
+#ifdef CONFIG_SMP
         int cpu;
 
         refresh_zone_stat_thresholds();
@@ -908,7 +922,10 @@ static int __init setup_vmstat(void)
 
         for_each_online_cpu(cpu)
                 start_cpu_timer(cpu);
+#endif
+#ifdef CONFIG_PROC_FS
+        proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations);
+#endif
         return 0;
 }
 module_init(setup_vmstat)
-#endif