drivers/zio/chardev: fix copy_to_user call for kernel >= 4.18

bf5a8961 · Gwenhael Goavec-Merou · Vaibhav Gupta · 72d18a38 · bf5a8961
Commit bf5a8961 authored Apr 28, 2023 by Gwenhael Goavec-Merou Committed by Vaibhav Gupta Jun 08, 2023
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chardev.c drivers/zio/chardev.c +4 -0

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--- a/drivers/zio/chardev.c
+++ b/drivers/zio/chardev.c
@@ -428,6 +428,10 @@ static ssize_t zio_generic_read(struct file *f, char __user *ubuf,
 	struct zio_channel *chan = priv->chan;
 	struct zio_bi *bi = chan->bi;
 	struct zio_block *block;
+#if KERNEL_VERSION(4, 18, 0) <= LINUX_VERSION_CODE
+	struct zio_control zio_ctrl;
+#endif
+
 	int (*can_read)(struct zio_f_priv *);
 	int fault;