From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH] crypto: crc32: implement crc32() with crc32_no_comp()
Date: Wed, 13 Dec 2023 15:00:04 +0100 [thread overview]
Message-ID: <20231213140004.898488-1-s.hauer@pengutronix.de> (raw)
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
crypto/crc32.c | 31 +++++++++----------------------
1 file changed, 9 insertions(+), 22 deletions(-)
diff --git a/crypto/crc32.c b/crypto/crc32.c
index 287dfa3303..7e969cd18e 100644
--- a/crypto/crc32.c
+++ b/crypto/crc32.c
@@ -77,28 +77,6 @@ static void make_crc_table(void)
#define DO4(buf) DO2(buf); DO2(buf);
#define DO8(buf) DO4(buf); DO4(buf);
-STATIC uint32_t crc32(uint32_t crc, const void *_buf, unsigned int len)
-{
- const unsigned char *buf = _buf;
-
- make_crc_table();
-
- crc = crc ^ 0xffffffffL;
- while (len >= 8) {
- DO8(buf);
- len -= 8;
- }
- if (len)
- do {
- DO1(buf);
- } while (--len);
- return crc ^ 0xffffffffL;
-}
-
-#ifdef __BAREBOX__
-EXPORT_SYMBOL(crc32);
-#endif
-
/* No ones complement version. JFFS2 (and other things ?)
* don't use ones compliment in their CRC calculations.
*/
@@ -120,6 +98,15 @@ STATIC uint32_t crc32_no_comp(uint32_t crc, const void *_buf, unsigned int len)
return crc;
}
+STATIC uint32_t crc32(uint32_t crc, const void *buf, unsigned int len)
+{
+ return ~crc32_no_comp(~crc, buf, len);
+}
+
+#ifdef __BAREBOX__
+EXPORT_SYMBOL(crc32);
+#endif
+
STATIC uint32_t crc32_be(uint32_t crc, const void *_buf, unsigned int len)
{
const unsigned char *buf = _buf;
--
2.39.2
reply other threads:[~2023-12-13 14:01 UTC|newest]
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