Convert /proc/device-tree/ to seq_file

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index 7ba79a54948cf049ad277a8c9d2fad0735ace088..123257bb356b38bc8fe614b101a2354a24c82e47 100644 (file)
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -7,6 +7,7 @@
 #include <linux/init.h>
 #include <linux/time.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/stat.h>
 #include <linux/string.h>
 #include <asm/prom.h>
@@ -25,26 +26,27 @@ static struct proc_dir_entry *proc_device_tree;
 /*
  * Supply data on a read from /proc/device-tree/node/property.
  */
-static int property_read_proc(char *page, char **start, off_t off,
-                             int count, int *eof, void *data)
+static int property_proc_show(struct seq_file *m, void *v)
 {
-       struct property *pp = data;
-       int n;
+       struct property *pp = m->private;
 
-       if (off >= pp->length) {
-               *eof = 1;
-               return 0;
-       }
-       n = pp->length - off;
-       if (n > count)
-               n = count;
-       else
-               *eof = 1;
-       memcpy(page, (char *)pp->value + off, n);
-       *start = page;
-       return n;
+       seq_write(m, pp->value, pp->length);
+       return 0;
+}
+
+static int property_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, property_proc_show, PDE(inode)->data);
 }
 
+static const struct file_operations property_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = property_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 /*
  * For a node with a name like "gc@10", we make symlinks called "gc"
  * and "@10" to it.
@@ -63,10 +65,9 @@ __proc_device_tree_add_prop(struct proc_dir_entry *de, struct property *pp,
         * Unfortunately proc_register puts each new entry
         * at the beginning of the list.  So we rearrange them.
         */
-       ent = create_proc_read_entry(name,
-                                    strncmp(name, "security-", 9)
-                                    ? S_IRUGO : S_IRUSR, de,
-                                    property_read_proc, pp);
+       ent = proc_create_data(name,
+                              strncmp(name, "security-", 9) ? S_IRUGO : S_IRUSR,
+                              de, &property_proc_fops, pp);
        if (ent == NULL)
                return NULL;