From b308a48cab8d28b27df128bd70c49b3f30931d2f Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sun, 17 Feb 2019 04:55:11 +0100
Subject: compat: backport ALIGN_DOWN

---
 src/compat/compat.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/compat/compat.h')

diff --git a/src/compat/compat.h b/src/compat/compat.h
index ae3189f..e08edca 100644
--- a/src/compat/compat.h
+++ b/src/compat/compat.h
@@ -766,6 +766,13 @@ struct __kernel_timespec {
 #endif
 #endif
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)
+#include <linux/kernel.h>
+#ifndef ALIGN_DOWN
+#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
+#endif
+#endif
+
 /* https://github.com/ClangBuiltLinux/linux/issues/7 */
 #if defined( __clang__) && (!defined(CONFIG_CLANG_VERSION) || CONFIG_CLANG_VERSION < 80000)
 #include <linux/bug.h>
-- 
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