[PATCH RESEND v2 04/30] lockd: let procfs copy out reads of nlm_end_grace

[Christian Brauner]

Implement ->proc_read_buf() so procfs copies what is read to userspace
after it unpinned the entry.

Acked-by: Chuck Lever <cel@xxxxxxxxxx>
Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>
---
 fs/lockd/procfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/lockd/procfs.c b/fs/lockd/procfs.c
index 852cca8c3588..64195c564cd3 100644
--- a/fs/lockd/procfs.c
+++ b/fs/lockd/procfs.c
@@ -40,7 +40,7 @@ nlm_end_grace_write(struct file *file, char *buf, size_t size, loff_t *pos)
 }
 
 static ssize_t
-nlm_end_grace_read(struct file *file, char __user *buf, size_t size,
+nlm_end_grace_read(struct file *file, char *buf, size_t size,
 		   loff_t *pos)
 {
 	struct lockd_net *ln = net_generic(current->nsproxy->net_ns,
@@ -51,12 +51,12 @@ nlm_end_grace_read(struct file *file, char __user *buf, size_t size,
 	resp[1] = '\n';
 	resp[2] = '\0';
 
-	return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp) - 1);
+	return memory_read_from_buffer(buf, size, pos, resp, sizeof(resp) - 1);
 }
 
 static const struct proc_ops lockd_end_grace_proc_ops = {
 	.proc_write_buf	= nlm_end_grace_write,
-	.proc_read	= nlm_end_grace_read,
+	.proc_read_buf	= nlm_end_grace_read,
 	.proc_lseek	= default_llseek,
 };
 

-- 
2.53.0