[PATCH RFC 19/27] kallsyms: let procfs own the seq_file of /proc/kallsyms

[Christian Brauner]

Declare the seq_operations and the size of the iterator and let procfs
open and free the seq_file. ->proc_open() only initializes the iterator
now.

Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>
---
 kernel/kallsyms.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index aec2f06858af..2d309fcee730 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -888,10 +888,9 @@ static int kallsyms_open(struct inode *inode, struct file *file)
 	 * s_start from where we left off, so we avoid doing
 	 * using get_symbol_offset for every symbol.
 	 */
-	struct kallsym_iter *iter;
-	iter = __seq_open_private(file, &kallsyms_op, sizeof(*iter));
-	if (!iter)
-		return -ENOMEM;
+	struct seq_file *m = file->private_data;
+	struct kallsym_iter *iter = m->private;
+
 	reset_iter(iter, 0);
 
 	/*
@@ -923,10 +922,9 @@ const char *kdb_walk_kallsyms(loff_t *pos)
 #endif	/* CONFIG_KGDB_KDB */
 
 static const struct proc_ops kallsyms_proc_ops = {
+	.proc_seq_ops	= &kallsyms_op,
+	.proc_state_size = sizeof(struct kallsym_iter),
 	.proc_open	= kallsyms_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= seq_release_private,
 };
 
 static int __init kallsyms_init(void)

-- 
2.53.0