proc: move /proc/diskstats boilerplate to block/genhd.c

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Jens Axboe <jens.axboe@oracle.com>

block/genhd.c

@@ -1005,15 +1005,28 @@ static int diskstats_show(struct seq_file *seqf, void *v)
 	return 0;
 }
 
-const struct seq_operations diskstats_op = {
+static const struct seq_operations diskstats_op = {
 	.start	= disk_seqf_start,
 	.next	= disk_seqf_next,
 	.stop	= disk_seqf_stop,
 	.show	= diskstats_show
 };
 
+static int diskstats_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &diskstats_op);
+}
+
+static const struct file_operations proc_diskstats_operations = {
+	.open		= diskstats_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
 static int __init proc_genhd_init(void)
 {
+	proc_create("diskstats", 0, NULL, &proc_diskstats_operations);
 	proc_create("partitions", 0, NULL, &proc_partitions_operations);
 	return 0;
 }

fs/proc/proc_misc.c

@@ -57,19 +57,6 @@
 #include <asm/div64.h>
 #include "internal.h"
 
-#ifdef CONFIG_BLOCK
-static int diskstats_open(struct inode *inode, struct file *file)
-{
-	return seq_open(file, &diskstats_op);
-}
-static const struct file_operations proc_diskstats_operations = {
-	.open		= diskstats_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-#endif
-
 #ifdef CONFIG_MODULES
 extern const struct seq_operations modules_op;
 static int modules_open(struct inode *inode, struct file *file)
@@ -222,9 +209,6 @@ void __init proc_misc_init(void)
 	proc_symlink("mounts", NULL, "self/mounts");
 
 	/* And now for trickier ones */
-#ifdef CONFIG_BLOCK
-	proc_create("diskstats", 0, NULL, &proc_diskstats_operations);
-#endif
 #ifdef CONFIG_MODULES
 	proc_create("modules", 0, NULL, &proc_modules_operations);
 #endif

include/linux/genhd.h

@@ -25,8 +25,6 @@ extern struct device_type part_type;
 extern struct kobject *block_depr;
 extern struct class block_class;
 
-extern const struct seq_operations diskstats_op;
-
 enum {
 /* These three have identical behaviour; use the second one if DOS FDISK gets
    confused about extended/logical partitions starting past cylinder 1023. */