From 9c2cb97e22a7a12bf87d0af7e90156afe7a78d21 Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Thu, 2 Aug 2018 23:58:02 -0700
Subject: lib: bitrev: Sync with Linux kernel v4.17

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 lib/bitrev.c | 28 +++++++++-------------------
 1 file changed, 9 insertions(+), 19 deletions(-)

(limited to 'lib/bitrev.c')

diff --git a/lib/bitrev.c b/lib/bitrev.c
index 4d494e1733..08231c056c 100644
--- a/lib/bitrev.c
+++ b/lib/bitrev.c
@@ -1,13 +1,14 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- *
- * Based on bitrev from the Linux kernel, by Akinobu Mita
- */
-
+// SPDX-License-Identifier: GPL-2.0
 
+#ifndef CONFIG_HAVE_ARCH_BITREVERSE
 #include <linux/types.h>
+#include <linux/compat.h>
 #include <linux/bitrev.h>
 
+MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");
+MODULE_DESCRIPTION("Bit ordering reversal functions");
+MODULE_LICENSE("GPL");
+
 const u8 byte_rev_table[256] = {
 	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
 	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
@@ -42,17 +43,6 @@ const u8 byte_rev_table[256] = {
 	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
 	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
 };
+EXPORT_SYMBOL_GPL(byte_rev_table);
 
-u16 bitrev16(u16 x)
-{
-	return (bitrev8(x & 0xff) << 8) | bitrev8(x >> 8);
-}
-
-/**
- * bitrev32 - reverse the order of bits in a u32 value
- * @x: value to be bit-reversed
- */
-u32 bitrev32(u32 x)
-{
-	return (bitrev16(x & 0xffff) << 16) | bitrev16(x >> 16);
-}
+#endif /* CONFIG_HAVE_ARCH_BITREVERSE */
-- 
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