[PATCH] proc: Move proc_maps_operations into task_mmu.c

All of the functions for proc_maps_operations are already defined in
task_mmu.c so move the operations structure to keep the functionality
together.

Since task_nommu.c implements a dummy version of /proc/<pid>/maps give it a
simplified version of proc_maps_operations that it can modify to best suit its
needs.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fs/proc/base.c

@@ -539,67 +539,6 @@ static int proc_check_chroot(struct dentry *de, struct vfsmount *mnt)
 	goto exit;
 }
 
-extern struct seq_operations proc_pid_maps_op;
-static int maps_open(struct inode *inode, struct file *file)
-{
-	struct task_struct *task = proc_task(inode);
-	int ret = seq_open(file, &proc_pid_maps_op);
-	if (!ret) {
-		struct seq_file *m = file->private_data;
-		m->private = task;
-	}
-	return ret;
-}
-
-static struct file_operations proc_maps_operations = {
-	.open		= maps_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-
-#ifdef CONFIG_NUMA
-extern struct seq_operations proc_pid_numa_maps_op;
-static int numa_maps_open(struct inode *inode, struct file *file)
-{
-	struct task_struct *task = proc_task(inode);
-	int ret = seq_open(file, &proc_pid_numa_maps_op);
-	if (!ret) {
-		struct seq_file *m = file->private_data;
-		m->private = task;
-	}
-	return ret;
-}
-
-static struct file_operations proc_numa_maps_operations = {
-	.open		= numa_maps_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-#endif
-
-#ifdef CONFIG_MMU
-extern struct seq_operations proc_pid_smaps_op;
-static int smaps_open(struct inode *inode, struct file *file)
-{
-	struct task_struct *task = proc_task(inode);
-	int ret = seq_open(file, &proc_pid_smaps_op);
-	if (!ret) {
-		struct seq_file *m = file->private_data;
-		m->private = task;
-	}
-	return ret;
-}
-
-static struct file_operations proc_smaps_operations = {
-	.open		= smaps_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= seq_release,
-};
-#endif
-
 extern struct seq_operations mounts_op;
 struct proc_mounts {
 	struct seq_file m;

fs/proc/internal.h

@@ -37,6 +37,10 @@ extern int proc_tgid_stat(struct task_struct *, char *);
 extern int proc_pid_status(struct task_struct *, char *);
 extern int proc_pid_statm(struct task_struct *, char *);
 
+extern struct file_operations proc_maps_operations;
+extern struct file_operations proc_numa_maps_operations;
+extern struct file_operations proc_smaps_operations;
+
 void free_proc_entry(struct proc_dir_entry *de);
 
 int proc_init_inodecache(void);

fs/proc/task_mmu.c

@@ -374,27 +374,75 @@ static void *m_next(struct seq_file *m, void *v, loff_t *pos)
 	return (vma != tail_vma)? tail_vma: NULL;
 }
 
-struct seq_operations proc_pid_maps_op = {
+static struct seq_operations proc_pid_maps_op = {
 	.start	= m_start,
 	.next	= m_next,
 	.stop	= m_stop,
 	.show	= show_map
 };
 
-struct seq_operations proc_pid_smaps_op = {
+static struct seq_operations proc_pid_smaps_op = {
 	.start	= m_start,
 	.next	= m_next,
 	.stop	= m_stop,
 	.show	= show_smap
 };
 
+static int do_maps_open(struct inode *inode, struct file *file,
+			struct seq_operations *ops)
+{
+	struct task_struct *task = proc_task(inode);
+	int ret = seq_open(file, ops);
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		m->private = task;
+	}
+	return ret;
+}
+
+static int maps_open(struct inode *inode, struct file *file)
+{
+	return do_maps_open(inode, file, &proc_pid_maps_op);
+}
+
+struct file_operations proc_maps_operations = {
+	.open		= maps_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
 #ifdef CONFIG_NUMA
 extern int show_numa_map(struct seq_file *m, void *v);
 
-struct seq_operations proc_pid_numa_maps_op = {
+static struct seq_operations proc_pid_numa_maps_op = {
         .start  = m_start,
         .next   = m_next,
         .stop   = m_stop,
         .show   = show_numa_map
 };
+
+static int numa_maps_open(struct inode *inode, struct file *file)
+{
+	return do_maps_open(inode, file, &proc_pid_numa_maps_op);
+}
+
+struct file_operations proc_numa_maps_operations = {
+	.open		= numa_maps_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
 #endif
+
+static int smaps_open(struct inode *inode, struct file *file)
+{
+	return do_maps_open(inode, file, &proc_pid_smaps_op);
+}
+
+struct file_operations proc_smaps_operations = {
+	.open		= smaps_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};

fs/proc/task_nommu.c

@@ -156,9 +156,28 @@ static void *m_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	return NULL;
 }
-struct seq_operations proc_pid_maps_op = {
+static struct seq_operations proc_pid_maps_op = {
 	.start	= m_start,
 	.next	= m_next,
 	.stop	= m_stop,
 	.show	= show_map
 };
+
+static int maps_open(struct inode *inode, struct file *file)
+{
+	int ret;
+	ret = seq_open(file, &proc_pid_maps_op);
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		m->private = NULL;
+	}
+	return ret;
+}
+
+struct file_operations proc_maps_operations = {
+	.open		= maps_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+