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According to kernel trace and printf.3, Z shouldn't be used and is
synonym to z. So replace accordingly.
--- a/vtunerc_ctrldev.c
+++ b/vtunerc_ctrldev.c
@@ -59,11 +59,11 @@ static ssize_t vtunerc_ctrldev_write(struct file *filp, const char *buff,
// allocate a bigger buffer
ctx->kernel_buf = kmalloc(len, GFP_KERNEL);
if (!ctx->kernel_buf) {
- printk(KERN_ERR "vtunerc%d: unable to allocate buffer of %Zu bytes\n", ctx->idx, len);
+ printk(KERN_ERR "vtunerc%d: unable to allocate buffer of %zu bytes\n", ctx->idx, len);
return -ENOMEM;
}
ctx->kernel_buf_size = len;
- printk(KERN_INFO "vtunerc%d: allocated buffer of %Zu bytes\n", ctx->idx, len);
+ printk(KERN_INFO "vtunerc%d: allocated buffer of %zu bytes\n", ctx->idx, len);
}
if (down_interruptible(&ctx->tswrite_sem)) {
--- a/vtunerc_main.c
+++ b/vtunerc_main.c
@@ -406,7 +406,7 @@ static void __exit vtunerc_exit(void)
// free allocated buffer
if(ctx->kernel_buf != NULL) {
kfree(ctx->kernel_buf);
- printk(KERN_INFO "vtunerc%d: deallocated buffer of %Zu bytes\n", idx, ctx->kernel_buf_size);
+ printk(KERN_INFO "vtunerc%d: deallocated buffer of %zu bytes\n", idx, ctx->kernel_buf_size);
ctx->kernel_buf = NULL;
ctx->kernel_buf_size = 0;
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