1 files changed, 18 insertions, 0 deletions

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 38bb59f3f2ad..774c1eb7f1c9 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -599,6 +599,24 @@ int single_open(struct file *file, int (*show)(struct seq_file *, void *),
 }
 EXPORT_SYMBOL(single_open);
 
+int single_open_size(struct file *file, int (*show)(struct seq_file *, void *),
+                void *data, size_t size)
+{
+        char *buf = kmalloc(size, GFP_KERNEL);
+        int ret;
+        if (!buf)
+                return -ENOMEM;
+        ret = single_open(file, show, data);
+        if (ret) {
+                kfree(buf);
+                return ret;
+        }
+        ((struct seq_file *)file->private_data)->buf = buf;
+        ((struct seq_file *)file->private_data)->size = size;
+        return 0;
+}
+EXPORT_SYMBOL(single_open_size);
+
 int single_release(struct inode *inode, struct file *file)
 {
         const struct seq_operations *op = ((struct seq_file *)file->private_data)->op;