Implement ->proc_write_buf() so procfs copies in what is written before
it pins the entry. The write only clears the statistics and doesn't look
at what was written anyway. Writes larger than PAGE_SIZE - 1 bytes fail
with -EINVAL now.
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
kernel/latencytop.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index b764f47606d3..35f73ca07656 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -267,8 +267,7 @@ static int lstats_show(struct seq_file *m, void *v)
}
static ssize_t
-lstats_write(struct file *file, const char __user *buf, size_t count,
- loff_t *offs)
+lstats_write(struct file *file, char *buf, size_t count, loff_t *offs)
{
clear_global_latency_tracing();
@@ -277,7 +276,7 @@ lstats_write(struct file *file, const char __user *buf, size_t count,
static const struct proc_ops lstats_proc_ops = {
.proc_show = lstats_show,
- .proc_write = lstats_write,
+ .proc_write_buf = lstats_write,
};
static int __init init_lstats_procfs(void)
--
2.53.0