From e9aa9b7d679302247de92e552dc250268298f18d Mon Sep 17 00:00:00 2001
From: HiGarfield <HiGarfield@126.com>
Date: Sat, 30 Dec 2023 01:05:35 +0800
Subject: [PATCH] exfat: fix ALIGN_DOWN undefined error

---
 balloc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/balloc.c b/balloc.c
index 63967f6..5aa9b4a 100644
--- a/balloc.c
+++ b/balloc.c
@@ -30,6 +30,10 @@
 #error "BITS_PER_LONG not 32 or 64"
 #endif
 
+#ifndef ALIGN_DOWN
+#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
+#endif 
+
 /*
  *  Allocation Bitmap Management Functions
  */