[PATCH] seq_file.h: introduce DECLARE_SEQ_FOPS_{RO,RW}

[H Hartley Sweeten]

Many of the procfs and debugfs attribute file_operations in the kernel are
missing the .owner information. Introduce some macro's to fill in the .owner
field as well as the common methods for virtual file file_operations.  This
simplifies creating the attributes and makes sure all the fields are properly
initialized.

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>

---

diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 03c0232..6a1f991 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -153,4 +153,28 @@ extern struct hlist_node *seq_hlist_start_head_rcu(struct hlist_head *head,
 extern struct hlist_node *seq_hlist_next_rcu(void *v,
 						   struct hlist_head *head,
 						   loff_t *ppos);
+
+/*
+ * virtual filesystem attribute files
+ */
+
+#define DECLARE_SEQ_FOPS_RO(name)			\
+static const struct file_operations name##_fops = {	\
+	.owner		= THIS_MODULE,			\
+	.llseek		= seq_lseek,			\
+	.read		= seq_read,			\
+	.open		= name##_open,			\
+	.release	= single_release,		\
+}
+
+#define DECLARE_SEQ_FOPS_RW(name)			\
+static const struct file_operations name##_fops = {	\
+	.owner		= THIS_MODULE,			\
+	.llseek		= seq_lseek,			\
+	.read		= seq_read,			\
+	.write		= name##_write,			\
+	.open		= name##_open,			\
+	.release	= single_release,		\
+}
+
 #endif
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