From 78d41552b41bf6ddb7feee5b80685a06f4816a72 Mon Sep 17 00:00:00 2001
From: Gleb Chesnokov <gleb.chesnokov@scst.dev>
Date: Tue, 9 Dec 2025 15:32:36 +0300
Subject: [PATCH] scst/include/backport.h: Unbreak build on kernels < 6.13

---
 scst/include/backport.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index 47f27afbf..d83dbd00c 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -34,6 +34,7 @@
 #include <linux/debugfs.h>
 #include <linux/dmapool.h>
 #include <linux/eventpoll.h>
+#include <linux/jiffies.h>
 #include <linux/iocontext.h>
 #include <linux/kobject_ns.h>
 #include <linux/scatterlist.h>	/* struct scatterlist */
@@ -668,6 +669,15 @@ kernel_write_backport(struct file *file, const void *buf, size_t count,
 #define kernel_write kernel_write_backport
 #endif
 
+/* <linux/jiffies.h> */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 13, 0)
+/*
+ * See also commit b35108a51cf7 ("jiffies: Define secs_to_jiffies()") # v6.13.
+ */
+#define secs_to_jiffies(_secs) (unsigned long)((_secs) * HZ)
+#endif
+
 /* <linux/iocontext.h> */
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 21, 0) || \