crc32: replace-self-test.diff

PATCH Superseded Bob Pearson 1 participant 1 message Aug 9, 2011 Library code

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Bob Pearson

author

2011-08-09 05:18 UTC #0 lore raw

PATCH v3 2/7 crc32: replace-self-test.diff

Replaced the unit test provided in crc32.c, which doesn't have a makefile and doesn't compile with current headers, with a simpler self test routine that also gives a measure of performance and runs at module init time. The self test option can be enabled through a configuration option CONFIG_CRC32_SELFTEST.

The test stresses the pre and post loops and is thus not very realistic since actual uses will likely have addresses and lengths that are at least 4 byte aligned. The typical main loop is long enough so that the performance is dominated by that loop.

The expected values for crc32_le and crc32_be were generated with the previous version of crc32.c using CRC_BITS_LE = 32 and CRC_BITS_BE = 32. These values were then used to check all the values of the BITS parameters.

Signed-off-by Bob Pearson <[email protected]>

---
 lib/Kconfig |   10
 lib/crc32.c |  794 +++++++++++++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 689 insertions(+), 115 deletions(-)

lib/crc32.c +679 ~~-115~~

Index: infiniband/lib/crc32.c
===================================================================
@@ -208,137 +208,701 @@ u32 __pure crc32_be(u32 crc, unsigned ch
 EXPORT_SYMBOL(crc32_le);
 EXPORT_SYMBOL(crc32_be);
 
-#ifdef UNITTEST
+#ifdef CONFIG_CRC32_SELFTEST
 
-#include <stdlib.h>
-#include <stdio.h>
-
-#if 0				/*Not used at present */
-static void
-buf_dump(char const *prefix, unsigned char const *buf, size_t len)
+/* 4096 random bytes */
+static u8 __attribute__((__aligned__(8))) test_buf[] =
 {
-	fputs(prefix, stdout);
-	while (len--)
-		printf(" %02x", *buf++);
-	putchar('\n');
-
-}
-#endif
-
-static void bytereverse(unsigned char *buf, size_t len)
+	0x5b, 0x85, 0x21, 0xcb, 0x09, 0x68, 0x7d, 0x30,
+	0xc7, 0x69, 0xd7, 0x30, 0x92, 0xde, 0x59, 0xe4,
+	0xc9, 0x6e, 0x8b, 0xdb, 0x98, 0x6b, 0xaa, 0x60,
+	0xa8, 0xb5, 0xbc, 0x6c, 0xa9, 0xb1, 0x5b, 0x2c,
+	0xea, 0xb4, 0x92, 0x6a, 0x3f, 0x79, 0x91, 0xe4,
+	0xe9, 0x70, 0x51, 0x8c, 0x7f, 0x95, 0x6f, 0x1a,
+	0x56, 0xa1, 0x5c, 0x27, 0x03, 0x67, 0x9f, 0x3a,
+	0xe2, 0x31, 0x11, 0x29, 0x6b, 0x98, 0xfc, 0xc4,
+	0x53, 0x24, 0xc5, 0x8b, 0xce, 0x47, 0xb2, 0xb9,
+	0x32, 0xcb, 0xc1, 0xd0, 0x03, 0x57, 0x4e, 0xd4,
+	0xe9, 0x3c, 0xa1, 0x63, 0xcf, 0x12, 0x0e, 0xca,
+	0xe1, 0x13, 0xd1, 0x93, 0xa6, 0x88, 0x5c, 0x61,
+	0x5b, 0xbb, 0xf0, 0x19, 0x46, 0xb4, 0xcf, 0x9e,
+	0xb6, 0x6b, 0x4c, 0x3a, 0xcf, 0x60, 0xf9, 0x7a,
+	0x8d, 0x07, 0x63, 0xdb, 0x40, 0xe9, 0x0b, 0x6f,
+	0xad, 0x97, 0xf1, 0xed, 0xd0, 0x1e, 0x26, 0xfd,
+	0xbf, 0xb7, 0xc8, 0x04, 0x94, 0xf8, 0x8b, 0x8c,
+	0xf1, 0xab, 0x7a, 0xd4, 0xdd, 0xf3, 0xe8, 0x88,
+	0xc3, 0xed, 0x17, 0x8a, 0x9b, 0x40, 0x0d, 0x53,
+	0x62, 0x12, 0x03, 0x5f, 0x1b, 0x35, 0x32, 0x1f,
+	0xb4, 0x7b, 0x93, 0x78, 0x0d, 0xdb, 0xce, 0xa4,
+	0xc0, 0x47, 0xd5, 0xbf, 0x68, 0xe8, 0x5d, 0x74,
+	0x8f, 0x8e, 0x75, 0x1c, 0xb2, 0x4f, 0x9a, 0x60,
+	0xd1, 0xbe, 0x10, 0xf4, 0x5c, 0xa1, 0x53, 0x09,
+	0xa5, 0xe0, 0x09, 0x54, 0x85, 0x5c, 0xdc, 0x07,
+	0xe7, 0x21, 0x69, 0x7b, 0x8a, 0xfd, 0x90, 0xf1,
+	0x22, 0xd0, 0xb4, 0x36, 0x28, 0xe6, 0xb8, 0x0f,
+	0x39, 0xde, 0xc8, 0xf3, 0x86, 0x60, 0x34, 0xd2,
+	0x5e, 0xdf, 0xfd, 0xcf, 0x0f, 0xa9, 0x65, 0xf0,
+	0xd5, 0x4d, 0x96, 0x40, 0xe3, 0xdf, 0x3f, 0x95,
+	0x5a, 0x39, 0x19, 0x93, 0xf4, 0x75, 0xce, 0x22,
+	0x00, 0x1c, 0x93, 0xe2, 0x03, 0x66, 0xf4, 0x93,
+	0x73, 0x86, 0x81, 0x8e, 0x29, 0x44, 0x48, 0x86,
+	0x61, 0x7c, 0x48, 0xa3, 0x43, 0xd2, 0x9c, 0x8d,
+	0xd4, 0x95, 0xdd, 0xe1, 0x22, 0x89, 0x3a, 0x40,
+	0x4c, 0x1b, 0x8a, 0x04, 0xa8, 0x09, 0x69, 0x8b,
+	0xea, 0xc6, 0x55, 0x8e, 0x57, 0xe6, 0x64, 0x35,
+	0xf0, 0xc7, 0x16, 0x9f, 0x5d, 0x5e, 0x86, 0x40,
+	0x46, 0xbb, 0xe5, 0x45, 0x88, 0xfe, 0xc9, 0x63,
+	0x15, 0xfb, 0xf5, 0xbd, 0x71, 0x61, 0xeb, 0x7b,
+	0x78, 0x70, 0x07, 0x31, 0x03, 0x9f, 0xb2, 0xc8,
+	0xa7, 0xab, 0x47, 0xfd, 0xdf, 0xa0, 0x78, 0x72,
+	0xa4, 0x2a, 0xe4, 0xb6, 0xba, 0xc0, 0x1e, 0x86,
+	0x71, 0xe6, 0x3d, 0x18, 0x37, 0x70, 0xe6, 0xff,
+	0xe0, 0xbc, 0x0b, 0x22, 0xa0, 0x1f, 0xd3, 0xed,
+	0xa2, 0x55, 0x39, 0xab, 0xa8, 0x13, 0x73, 0x7c,
+	0x3f, 0xb2, 0xd6, 0x19, 0xac, 0xff, 0x99, 0xed,
+	0xe8, 0xe6, 0xa6, 0x22, 0xe3, 0x9c, 0xf1, 0x30,
+	0xdc, 0x01, 0x0a, 0x56, 0xfa, 0xe4, 0xc9, 0x99,
+	0xdd, 0xa8, 0xd8, 0xda, 0x35, 0x51, 0x73, 0xb4,
+	0x40, 0x86, 0x85, 0xdb, 0x5c, 0xd5, 0x85, 0x80,
+	0x14, 0x9c, 0xfd, 0x98, 0xa9, 0x82, 0xc5, 0x37,
+	0xff, 0x32, 0x5d, 0xd0, 0x0b, 0xfa, 0xdc, 0x04,
+	0x5e, 0x09, 0xd2, 0xca, 0x17, 0x4b, 0x1a, 0x8e,
+	0x15, 0xe1, 0xcc, 0x4e, 0x52, 0x88, 0x35, 0xbd,
+	0x48, 0xfe, 0x15, 0xa0, 0x91, 0xfd, 0x7e, 0x6c,
+	0x0e, 0x5d, 0x79, 0x1b, 0x81, 0x79, 0xd2, 0x09,
+	0x34, 0x70, 0x3d, 0x81, 0xec, 0xf6, 0x24, 0xbb,
+	0xfb, 0xf1, 0x7b, 0xdf, 0x54, 0xea, 0x80, 0x9b,
+	0xc7, 0x99, 0x9e, 0xbd, 0x16, 0x78, 0x12, 0x53,
+	0x5e, 0x01, 0xa7, 0x4e, 0xbd, 0x67, 0xe1, 0x9b,
+	0x4c, 0x0e, 0x61, 0x45, 0x97, 0xd2, 0xf0, 0x0f,
+	0xfe, 0x15, 0x08, 0xb7, 0x11, 0x4c, 0xe7, 0xff,
+	0x81, 0x53, 0xff, 0x91, 0x25, 0x38, 0x7e, 0x40,
+	0x94, 0xe5, 0xe0, 0xad, 0xe6, 0xd9, 0x79, 0xb6,
+	0x92, 0xc9, 0xfc, 0xde, 0xc3, 0x1a, 0x23, 0xbb,
+	0xdd, 0xc8, 0x51, 0x0c, 0x3a, 0x72, 0xfa, 0x73,
+	0x6f, 0xb7, 0xee, 0x61, 0x39, 0x03, 0x01, 0x3f,
+	0x7f, 0x94, 0x2e, 0x2e, 0xba, 0x3a, 0xbb, 0xb4,
+	0xfa, 0x6a, 0x17, 0xfe, 0xea, 0xef, 0x5e, 0x66,
+	0x97, 0x3f, 0x32, 0x3d, 0xd7, 0x3e, 0xb1, 0xf1,
+	0x6c, 0x14, 0x4c, 0xfd, 0x37, 0xd3, 0x38, 0x80,
+	0xfb, 0xde, 0xa6, 0x24, 0x1e, 0xc8, 0xca, 0x7f,
+	0x3a, 0x93, 0xd8, 0x8b, 0x18, 0x13, 0xb2, 0xe5,
+	0xe4, 0x93, 0x05, 0x53, 0x4f, 0x84, 0x66, 0xa7,
+	0x58, 0x5c, 0x7b, 0x86, 0x52, 0x6d, 0x0d, 0xce,
+	0xa4, 0x30, 0x7d, 0xb6, 0x18, 0x9f, 0xeb, 0xff,
+	0x22, 0xbb, 0x72, 0x29, 0xb9, 0x44, 0x0b, 0x48,
+	0x1e, 0x84, 0x71, 0x81, 0xe3, 0x6d, 0x73, 0x26,
+	0x92, 0xb4, 0x4d, 0x2a, 0x29, 0xb8, 0x1f, 0x72,
+	0xed, 0xd0, 0xe1, 0x64, 0x77, 0xea, 0x8e, 0x88,
+	0x0f, 0xef, 0x3f, 0xb1, 0x3b, 0xad, 0xf9, 0xc9,
+	0x8b, 0xd0, 0xac, 0xc6, 0xcc, 0xa9, 0x40, 0xcc,
+	0x76, 0xf6, 0x3b, 0x53, 0xb5, 0x88, 0xcb, 0xc8,
+	0x37, 0xf1, 0xa2, 0xba, 0x23, 0x15, 0x99, 0x09,
+	0xcc, 0xe7, 0x7a, 0x3b, 0x37, 0xf7, 0x58, 0xc8,
+	0x46, 0x8c, 0x2b, 0x2f, 0x4e, 0x0e, 0xa6, 0x5c,
+	0xea, 0x85, 0x55, 0xba, 0x02, 0x0e, 0x0e, 0x48,
+	0xbc, 0xe1, 0xb1, 0x01, 0x35, 0x79, 0x13, 0x3d,
+	0x1b, 0xc0, 0x53, 0x68, 0x11, 0xe7, 0x95, 0x0f,
+	0x9d, 0x3f, 0x4c, 0x47, 0x7b, 0x4d, 0x1c, 0xae,
+	0x50, 0x9b, 0xcb, 0xdd, 0x05, 0x8d, 0x9a, 0x97,
+	0xfd, 0x8c, 0xef, 0x0c, 0x1d, 0x67, 0x73, 0xa8,
+	0x28, 0x36, 0xd5, 0xb6, 0x92, 0x33, 0x40, 0x75,
+	0x0b, 0x51, 0xc3, 0x64, 0xba, 0x1d, 0xc2, 0xcc,
+	0xee, 0x7d, 0x54, 0x0f, 0x27, 0x69, 0xa7, 0x27,
+	0x63, 0x30, 0x29, 0xd9, 0xc8, 0x84, 0xd8, 0xdf,
+	0x9f, 0x68, 0x8d, 0x04, 0xca, 0xa6, 0xc5, 0xc7,
+	0x7a, 0x5c, 0xc8, 0xd1, 0xcb, 0x4a, 0xec, 0xd0,
+	0xd8, 0x20, 0x69, 0xc5, 0x17, 0xcd, 0x78, 0xc8,
+	0x75, 0x23, 0x30, 0x69, 0xc9, 0xd4, 0xea, 0x5c,
+	0x4f, 0x6b, 0x86, 0x3f, 0x8b, 0xfe, 0xee, 0x44,
+	0xc9, 0x7c, 0xb7, 0xdd, 0x3e, 0xe5, 0xec, 0x54,
+	0x03, 0x3e, 0xaa, 0x82, 0xc6, 0xdf, 0xb2, 0x38,
+	0x0e, 0x5d, 0xb3, 0x88, 0xd9, 0xd3, 0x69, 0x5f,
+	0x8f, 0x70, 0x8a, 0x7e, 0x11, 0xd9, 0x1e, 0x7b,
+	0x38, 0xf1, 0x42, 0x1a, 0xc0, 0x35, 0xf5, 0xc7,
+	0x36, 0x85, 0xf5, 0xf7, 0xb8, 0x7e, 0xc7, 0xef,
+	0x18, 0xf1, 0x63, 0xd6, 0x7a, 0xc6, 0xc9, 0x0e,
+	0x4d, 0x69, 0x4f, 0x84, 0xef, 0x26, 0x41, 0x0c,
+	0xec, 0xc7, 0xe0, 0x7e, 0x3c, 0x67, 0x01, 0x4c,
+	0x62, 0x1a, 0x20, 0x6f, 0xee, 0x47, 0x4d, 0xc0,
+	0x99, 0x13, 0x8d, 0x91, 0x4a, 0x26, 0xd4, 0x37,
+	0x28, 0x90, 0x58, 0x75, 0x66, 0x2b, 0x0a, 0xdf,
+	0xda, 0xee, 0x92, 0x25, 0x90, 0x62, 0x39, 0x9e,
+	0x44, 0x98, 0xad, 0xc1, 0x88, 0xed, 0xe4, 0xb4,
+	0xaf, 0xf5, 0x8c, 0x9b, 0x48, 0x4d, 0x56, 0x60,
+	0x97, 0x0f, 0x61, 0x59, 0x9e, 0xa6, 0x27, 0xfe,
+	0xc1, 0x91, 0x15, 0x38, 0xb8, 0x0f, 0xae, 0x61,
+	0x7d, 0x26, 0x13, 0x5a, 0x73, 0xff, 0x1c, 0xa3,
+	0x61, 0x04, 0x58, 0x48, 0x55, 0x44, 0x11, 0xfe,
+	0x15, 0xca, 0xc3, 0xbd, 0xca, 0xc5, 0xb4, 0x40,
+	0x5d, 0x1b, 0x7f, 0x39, 0xb5, 0x9c, 0x35, 0xec,
+	0x61, 0x15, 0x32, 0x32, 0xb8, 0x4e, 0x40, 0x9f,
+	0x17, 0x1f, 0x0a, 0x4d, 0xa9, 0x91, 0xef, 0xb7,
+	0xb0, 0xeb, 0xc2, 0x83, 0x9a, 0x6c, 0xd2, 0x79,
+	0x43, 0x78, 0x5e, 0x2f, 0xe5, 0xdd, 0x1a, 0x3c,
+	0x45, 0xab, 0x29, 0x40, 0x3a, 0x37, 0x5b, 0x6f,
+	0xd7, 0xfc, 0x48, 0x64, 0x3c, 0x49, 0xfb, 0x21,
+	0xbe, 0xc3, 0xff, 0x07, 0xfb, 0x17, 0xe9, 0xc9,
+	0x0c, 0x4c, 0x5c, 0x15, 0x9e, 0x8e, 0x22, 0x30,
+	0x0a, 0xde, 0x48, 0x7f, 0xdb, 0x0d, 0xd1, 0x2b,
+	0x87, 0x38, 0x9e, 0xcc, 0x5a, 0x01, 0x16, 0xee,
+	0x75, 0x49, 0x0d, 0x30, 0x01, 0x34, 0x6a, 0xb6,
+	0x9a, 0x5a, 0x2a, 0xec, 0xbb, 0x48, 0xac, 0xd3,
+	0x77, 0x83, 0xd8, 0x08, 0x86, 0x4f, 0x48, 0x09,
+	0x29, 0x41, 0x79, 0xa1, 0x03, 0x12, 0xc4, 0xcd,
+	0x90, 0x55, 0x47, 0x66, 0x74, 0x9a, 0xcc, 0x4f,
+	0x35, 0x8c, 0xd6, 0x98, 0xef, 0xeb, 0x45, 0xb9,
+	0x9a, 0x26, 0x2f, 0x39, 0xa5, 0x70, 0x6d, 0xfc,
+	0xb4, 0x51, 0xee, 0xf4, 0x9c, 0xe7, 0x38, 0x59,
+	0xad, 0xf4, 0xbc, 0x46, 0xff, 0x46, 0x8e, 0x60,
+	0x9c, 0xa3, 0x60, 0x1d, 0xf8, 0x26, 0x72, 0xf5,
+	0x72, 0x9d, 0x68, 0x80, 0x04, 0xf6, 0x0b, 0xa1,
+	0x0a, 0xd5, 0xa7, 0x82, 0x3a, 0x3e, 0x47, 0xa8,
+	0x5a, 0xde, 0x59, 0x4f, 0x7b, 0x07, 0xb3, 0xe9,
+	0x24, 0x19, 0x3d, 0x34, 0x05, 0xec, 0xf1, 0xab,
+	0x6e, 0x64, 0x8f, 0xd3, 0xe6, 0x41, 0x86, 0x80,
+	0x70, 0xe3, 0x8d, 0x60, 0x9c, 0x34, 0x25, 0x01,
+	0x07, 0x4d, 0x19, 0x41, 0x4e, 0x3d, 0x5c, 0x7e,
+	0xa8, 0xf5, 0xcc, 0xd5, 0x7b, 0xe2, 0x7d, 0x3d,
+	0x49, 0x86, 0x7d, 0x07, 0xb7, 0x10, 0xe3, 0x35,
+	0xb8, 0x84, 0x6d, 0x76, 0xab, 0x17, 0xc6, 0x38,
+	0xb4, 0xd3, 0x28, 0x57, 0xad, 0xd3, 0x88, 0x5a,
+	0xda, 0xea, 0xc8, 0x94, 0xcc, 0x37, 0x19, 0xac,
+	0x9c, 0x9f, 0x4b, 0x00, 0x15, 0xc0, 0xc8, 0xca,
+	0x1f, 0x15, 0xaa, 0xe0, 0xdb, 0xf9, 0x2f, 0x57,
+	0x1b, 0x24, 0xc7, 0x6f, 0x76, 0x29, 0xfb, 0xed,
+	0x25, 0x0d, 0xc0, 0xfe, 0xbd, 0x5a, 0xbf, 0x20,
+	0x08, 0x51, 0x05, 0xec, 0x71, 0xa3, 0xbf, 0xef,
+	0x5e, 0x99, 0x75, 0xdb, 0x3c, 0x5f, 0x9a, 0x8c,
+	0xbb, 0x19, 0x5c, 0x0e, 0x93, 0x19, 0xf8, 0x6a,
+	0xbc, 0xf2, 0x12, 0x54, 0x2f, 0xcb, 0x28, 0x64,
+	0x88, 0xb3, 0x92, 0x0d, 0x96, 0xd1, 0xa6, 0xe4,
+	0x1f, 0xf1, 0x4d, 0xa4, 0xab, 0x1c, 0xee, 0x54,
+	0xf2, 0xad, 0x29, 0x6d, 0x32, 0x37, 0xb2, 0x16,
+	0x77, 0x5c, 0xdc, 0x2e, 0x54, 0xec, 0x75, 0x26,
+	0xc6, 0x36, 0xd9, 0x17, 0x2c, 0xf1, 0x7a, 0xdc,
+	0x4b, 0xf1, 0xe2, 0xd9, 0x95, 0xba, 0xac, 0x87,
+	0xc1, 0xf3, 0x8e, 0x58, 0x08, 0xd8, 0x87, 0x60,
+	0xc9, 0xee, 0x6a, 0xde, 0xa4, 0xd2, 0xfc, 0x0d,
+	0xe5, 0x36, 0xc4, 0x5c, 0x52, 0xb3, 0x07, 0x54,
+	0x65, 0x24, 0xc1, 0xb1, 0xd1, 0xb1, 0x53, 0x13,
+	0x31, 0x79, 0x7f, 0x05, 0x76, 0xeb, 0x37, 0x59,
+	0x15, 0x2b, 0xd1, 0x3f, 0xac, 0x08, 0x97, 0xeb,
+	0x91, 0x98, 0xdf, 0x6c, 0x09, 0x0d, 0x04, 0x9f,
+	0xdc, 0x3b, 0x0e, 0x60, 0x68, 0x47, 0x23, 0x15,
+	0x16, 0xc6, 0x0b, 0x35, 0xf8, 0x77, 0xa2, 0x78,
+	0x50, 0xd4, 0x64, 0x22, 0x33, 0xff, 0xfb, 0x93,
+	0x71, 0x46, 0x50, 0x39, 0x1b, 0x9c, 0xea, 0x4e,
+	0x8d, 0x0c, 0x37, 0xe5, 0x5c, 0x51, 0x3a, 0x31,
+	0xb2, 0x85, 0x84, 0x3f, 0x41, 0xee, 0xa2, 0xc1,
+	0xc6, 0x13, 0x3b, 0x54, 0x28, 0xd2, 0x18, 0x37,
+	0xcc, 0x46, 0x9f, 0x6a, 0x91, 0x3d, 0x5a, 0x15,
+	0x3c, 0x89, 0xa3, 0x61, 0x06, 0x7d, 0x2e, 0x78,
+	0xbe, 0x7d, 0x40, 0xba, 0x2f, 0x95, 0xb1, 0x2f,
+	0x87, 0x3b, 0x8a, 0xbe, 0x6a, 0xf4, 0xc2, 0x31,
+	0x74, 0xee, 0x91, 0xe0, 0x23, 0xaa, 0x5d, 0x7f,
+	0xdd, 0xf0, 0x44, 0x8c, 0x0b, 0x59, 0x2b, 0xfc,
+	0x48, 0x3a, 0xdf, 0x07, 0x05, 0x38, 0x6c, 0xc9,
+	0xeb, 0x18, 0x24, 0x68, 0x8d, 0x58, 0x98, 0xd3,
+	0x31, 0xa3, 0xe4, 0x70, 0x59, 0xb1, 0x21, 0xbe,
+	0x7e, 0x65, 0x7d, 0xb8, 0x04, 0xab, 0xf6, 0xe4,
+	0xd7, 0xda, 0xec, 0x09, 0x8f, 0xda, 0x6d, 0x24,
+	0x07, 0xcc, 0x29, 0x17, 0x05, 0x78, 0x1a, 0xc1,
+	0xb1, 0xce, 0xfc, 0xaa, 0x2d, 0xe7, 0xcc, 0x85,
+	0x84, 0x84, 0x03, 0x2a, 0x0c, 0x3f, 0xa9, 0xf8,
+	0xfd, 0x84, 0x53, 0x59, 0x5c, 0xf0, 0xd4, 0x09,
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+	0x22, 0x7c, 0x8e, 0x83, 0x04, 0xce, 0xf6, 0x5d,
+	0x84, 0x8f, 0x95, 0x6a, 0x7f, 0xad, 0xfd, 0x32,
+	0x9c, 0x5e, 0xe4, 0x9c, 0x89, 0x60, 0x54, 0xaa,
+	0x96, 0x72, 0xd2, 0xd7, 0x36, 0x85, 0xa9, 0x45,
+	0xd2, 0x2a, 0xa1, 0x81, 0x49, 0x6f, 0x7e, 0x04,
+	0xfa, 0xe2, 0xfe, 0x90, 0x26, 0x77, 0x5a, 0x33,
+	0xb8, 0x04, 0x9a, 0x7a, 0xe6, 0x4c, 0x4f, 0xad,
+	0x72, 0x96, 0x08, 0x28, 0x58, 0x13, 0xf8, 0xc4,
+	0x1c, 0xf0, 0xc3, 0x45, 0x95, 0x49, 0x20, 0x8c,
+	0x9f, 0x39, 0x70, 0xe1, 0x77, 0xfe, 0xd5, 0x4b,
+	0xaf, 0x86, 0xda, 0xef, 0x22, 0x06, 0x83, 0x36,
+	0x29, 0x12, 0x11, 0x40, 0xbc, 0x3b, 0x86, 0xaa,
+	0xaa, 0x65, 0x60, 0xc3, 0x80, 0xca, 0xed, 0xa9,
+	0xf3, 0xb0, 0x79, 0x96, 0xa2, 0x55, 0x27, 0x28,
+	0x55, 0x73, 0x26, 0xa5, 0x50, 0xea, 0x92, 0x4b,
+	0x3c, 0x5c, 0x82, 0x33, 0xf0, 0x01, 0x3f, 0x03,
+	0xc1, 0x08, 0x05, 0xbf, 0x98, 0xf4, 0x9b, 0x6d,
+	0xa5, 0xa8, 0xb4, 0x82, 0x0c, 0x06, 0xfa, 0xff,
+	0x2d, 0x08, 0xf3, 0x05, 0x4f, 0x57, 0x2a, 0x39,
+	0xd4, 0x83, 0x0d, 0x75, 0x51, 0xd8, 0x5b, 0x1b,
+	0xd3, 0x51, 0x5a, 0x32, 0x2a, 0x9b, 0x32, 0xb2,
+	0xf2, 0xa4, 0x96, 0x12, 0xf2, 0xae, 0x40, 0x34,
+	0x67, 0xa8, 0xf5, 0x44, 0xd5, 0x35, 0x53, 0xfe,
+	0xa3, 0x60, 0x96, 0x63, 0x0f, 0x1f, 0x6e, 0xb0,
+	0x5a, 0x42, 0xa6, 0xfc, 0x51, 0x0b, 0x60, 0x27,
+	0xbc, 0x06, 0x71, 0xed, 0x65, 0x5b, 0x23, 0x86,
+	0x4a, 0x07, 0x3b, 0x22, 0x07, 0x46, 0xe6, 0x90,
+	0x3e, 0xf3, 0x25, 0x50, 0x1b, 0x4c, 0x7f, 0x03,
+	0x08, 0xa8, 0x36, 0x6b, 0x87, 0xe5, 0xe3, 0xdb,
+	0x9a, 0x38, 0x83, 0xff, 0x9f, 0x1a, 0x9f, 0x57,
+	0xa4, 0x2a, 0xf6, 0x37, 0xbc, 0x1a, 0xff, 0xc9,
+	0x1e, 0x35, 0x0c, 0xc3, 0x7c, 0xa3, 0xb2, 0xe5,
+	0xd2, 0xc6, 0xb4, 0x57, 0x47, 0xe4, 0x32, 0x16,
+	0x6d, 0xa9, 0xae, 0x64, 0xe6, 0x2d, 0x8d, 0xc5,
+	0x8d, 0x50, 0x8e, 0xe8, 0x1a, 0x22, 0x34, 0x2a,
+	0xd9, 0xeb, 0x51, 0x90, 0x4a, 0xb1, 0x41, 0x7d,
+	0x64, 0xf9, 0xb9, 0x0d, 0xf6, 0x23, 0x33, 0xb0,
+	0x33, 0xf4, 0xf7, 0x3f, 0x27, 0x84, 0xc6, 0x0f,
+	0x54, 0xa5, 0xc0, 0x2e, 0xec, 0x0b, 0x3a, 0x48,
+	0x6e, 0x80, 0x35, 0x81, 0x43, 0x9b, 0x90, 0xb1,
+	0xd0, 0x2b, 0xea, 0x21, 0xdc, 0xda, 0x5b, 0x09,
+	0xf4, 0xcc, 0x10, 0xb4, 0xc7, 0xfe, 0x79, 0x51,
+	0xc3, 0xc5, 0xac, 0x88, 0x74, 0x84, 0x0b, 0x4b,
+	0xca, 0x79, 0x16, 0x29, 0xfb, 0x69, 0x54, 0xdf,
+	0x41, 0x7e, 0xe9, 0xc7, 0x8e, 0xea, 0xa5, 0xfe,
+	0xfc, 0x76, 0x0e, 0x90, 0xc4, 0x92, 0x38, 0xad,
+	0x7b, 0x48, 0xe6, 0x6e, 0xf7, 0x21, 0xfd, 0x4e,
+	0x93, 0x0a, 0x7b, 0x41, 0x83, 0x68, 0xfb, 0x57,
+	0x51, 0x76, 0x34, 0xa9, 0x6c, 0x00, 0xaa, 0x4f,
+	0x66, 0x65, 0x98, 0x4a, 0x4f, 0xa3, 0xa0, 0xef,
+	0x69, 0x3f, 0xe3, 0x1c, 0x92, 0x8c, 0xfd, 0xd8,
+	0xe8, 0xde, 0x7c, 0x7f, 0x3e, 0x84, 0x8e, 0x69,
+	0x3c, 0xf1, 0xf2, 0x05, 0x46, 0xdc, 0x2f, 0x9d,
+	0x5e, 0x6e, 0x4c, 0xfb, 0xb5, 0x99, 0x2a, 0x59,
+	0x63, 0xc1, 0x34, 0xbc, 0x57, 0xc0, 0x0d, 0xb9,
+	0x61, 0x25, 0xf3, 0x33, 0x23, 0x51, 0xb6, 0x0d,
+	0x07, 0xa6, 0xab, 0x94, 0x4a, 0xb7, 0x2a, 0xea,
+	0xee, 0xac, 0xa3, 0xc3, 0x04, 0x8b, 0x0e, 0x56,
+	0xfe, 0x44, 0xa7, 0x39, 0xe2, 0xed, 0xed, 0xb4,
+	0x22, 0x2b, 0xac, 0x12, 0x32, 0x28, 0x91, 0xd8,
+	0xa5, 0xab, 0xff, 0x5f, 0xe0, 0x4b, 0xda, 0x78,
+	0x17, 0xda, 0xf1, 0x01, 0x5b, 0xcd, 0xe2, 0x5f,
+	0x50, 0x45, 0x73, 0x2b, 0xe4, 0x76, 0x77, 0xf4,
+	0x64, 0x1d, 0x43, 0xfb, 0x84, 0x7a, 0xea, 0x91,
+	0xae, 0xf9, 0x9e, 0xb7, 0xb4, 0xb0, 0x91, 0x5f,
+	0x16, 0x35, 0x9a, 0x11, 0xb8, 0xc7, 0xc1, 0x8c,
+	0xc6, 0x10, 0x8d, 0x2f, 0x63, 0x4a, 0xa7, 0x57,
+	0x3a, 0x51, 0xd6, 0x32, 0x2d, 0x64, 0x72, 0xd4,
+	0x66, 0xdc, 0x10, 0xa6, 0x67, 0xd6, 0x04, 0x23,
+	0x9d, 0x0a, 0x11, 0x77, 0xdd, 0x37, 0x94, 0x17,
+	0x3c, 0xbf, 0x8b, 0x65, 0xb0, 0x2e, 0x5e, 0x66,
+	0x47, 0x64, 0xac, 0xdd, 0xf0, 0x84, 0xfd, 0x39,
+	0xfa, 0x15, 0x5d, 0xef, 0xae, 0xca, 0xc1, 0x36,
+	0xa7, 0x5c, 0xbf, 0xc7, 0x08, 0xc2, 0x66, 0x00,
+	0x74, 0x74, 0x4e, 0x27, 0x3f, 0x55, 0x8a, 0xb7,
+	0x38, 0x66, 0x83, 0x6d, 0xcf, 0x99, 0x9e, 0x60,
+	0x8f, 0xdd, 0x2e, 0x62, 0x22, 0x0e, 0xef, 0x0c,
+	0x98, 0xa7, 0x85, 0x74, 0x3b, 0x9d, 0xec, 0x9e,
+	0xa9, 0x19, 0x72, 0xa5, 0x7f, 0x2c, 0x39, 0xb7,
+	0x7d, 0xb7, 0xf1, 0x12, 0x65, 0x27, 0x4b, 0x5a,
+	0xde, 0x17, 0xfe, 0xad, 0x44, 0xf3, 0x20, 0x4d,
+	0xfd, 0xe4, 0x1f, 0xb5, 0x81, 0xb0, 0x36, 0x37,
+	0x08, 0x6f, 0xc3, 0x0c, 0xe9, 0x85, 0x98, 0x82,
+	0xa9, 0x62, 0x0c, 0xc4, 0x97, 0xc0, 0x50, 0xc8,
+	0xa7, 0x3c, 0x50, 0x9f, 0x43, 0xb9, 0xcd, 0x5e,
+	0x4d, 0xfa, 0x1c, 0x4b, 0x0b, 0xa9, 0x98, 0x85,
+	0x38, 0x92, 0xac, 0x8d, 0xe4, 0xad, 0x9b, 0x98,
+	0xab, 0xd9, 0x38, 0xac, 0x62, 0x52, 0xa3, 0x22,
+	0x63, 0x0f, 0xbf, 0x95, 0x48, 0xdf, 0x69, 0xe7,
+	0x8b, 0x33, 0xd5, 0xb2, 0xbd, 0x05, 0x49, 0x49,
+	0x9d, 0x57, 0x73, 0x19, 0x33, 0xae, 0xfa, 0x33,
+	0xf1, 0x19, 0xa8, 0x80, 0xce, 0x04, 0x9f, 0xbc,
+	0x1d, 0x65, 0x82, 0x1b, 0xe5, 0x3a, 0x51, 0xc8,
+	0x1c, 0x21, 0xe3, 0x5d, 0xf3, 0x7d, 0x9b, 0x2f,
+	0x2c, 0x1d, 0x4a, 0x7f, 0x9b, 0x68, 0x35, 0xa3,
+	0xb2, 0x50, 0xf7, 0x62, 0x79, 0xcd, 0xf4, 0x98,
+	0x4f, 0xe5, 0x63, 0x7c, 0x3e, 0x45, 0x31, 0x8c,
+	0x16, 0xa0, 0x12, 0xc8, 0x58, 0xce, 0x39, 0xa6,
+	0xbc, 0x54, 0xdb, 0xc5, 0xe0, 0xd5, 0xba, 0xbc,
+	0xb9, 0x04, 0xf4, 0x8d, 0xe8, 0x2f, 0x15, 0x9d,
+};
+
+/* 100 test cases */
+static struct crc_test {
+	u32 crc;	/* random starting crc */
+	u32 start;	/* random 6 bit offset in buf */
+	u32 length;	/* random 11 bit length of test */
+	u32 crc_le;	/* expected crc32_le result */
+	u32 crc_be;	/* expected crc32_be result */
+} test[] =
 {
-	while (len--) {
-		unsigned char x = bitrev8(*buf);
-		*buf++ = x;
-	}
-}
+	{0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1},
+	{0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad},
+	{0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f},
+	{0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a},
+	{0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2},
+	{0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793},
+	{0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed},
+	{0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35},
+	{0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2},
+	{0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10},
+	{0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb},
+	{0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0},
+	{0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb},
+	{0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed},
+	{0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591},
+	{0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67},
+	{0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd},
+	{0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a},
+	{0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b},
+	{0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f},
+	{0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d},
+	{0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a},
+	{0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97},
+	{0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2},
+	{0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138},
+	{0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032},
+	{0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f},
+	{0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f},
+	{0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32},
+	{0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef},
+	{0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0},
+	{0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59},
+	{0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4},
+	{0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c},
+	{0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51},
+	{0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11},
+	{0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659},
+	{0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af},
+	{0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99},
+	{0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b},
+	{0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521},
+	{0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3},
+	{0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d},
+	{0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f},
+	{0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b},
+	{0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0},
+	{0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195},
+	{0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d},
+	{0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4},
+	{0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3},
+	{0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643},
+	{0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10},
+	{0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d},
+	{0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5},
+	{0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b},
+	{0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee},
+	{0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14},
+	{0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a},
+	{0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b},
+	{0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3},
+	{0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826},
+	{0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06},
+	{0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35},
+	{0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801},
+	{0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2},
+	{0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d},
+	{0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c},
+	{0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba},
+	{0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5},
+	{0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b},
+	{0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178},
+	{0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3},
+	{0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605},
+	{0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1},
+	{0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9},
+	{0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78},
+	{0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9},
+	{0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd},
+	{0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab},
+	{0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb},
+	{0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77},
+	{0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da},
+	{0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39},
+	{0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16},
+	{0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208},
+	{0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e},
+	{0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5},
+	{0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892},
+	{0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db},
+	{0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43},
+	{0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac},
+	{0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7},
+	{0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2},
+	{0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2},
+	{0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640},
+	{0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f},
+	{0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99},
+	{0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7},
+	{0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499},
+	{0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a},
+};
 
-static void random_garbage(unsigned char *buf, size_t len)
-{
-	while (len--)
-		*buf++ = (unsigned char) random();
-}
+#include <linux/time.h>
 
-#if 0				/* Not used at present */
-static void store_le(u32 x, unsigned char *buf)
+static int __init crc32_init(void)
 {
-	buf[0] = (unsigned char) x;
-	buf[1] = (unsigned char) (x >> 8);
-	buf[2] = (unsigned char) (x >> 16);
-	buf[3] = (unsigned char) (x >> 24);
-}
-#endif
+	int i;
+	int errors = 0;
+	int bytes = 0;
+	struct timespec start, stop;
+	u64 nsec;
+	unsigned long flags;
+
+	/* keep static to prevent cache warming code from
+	 * getting eliminated by the compiler */
+	static u32 crc;
+
+	/* pre-warm the cache */
+	for (i = 0; i < 100; i++) {
+		bytes += 2*test[i].length;
 
-static void store_be(u32 x, unsigned char *buf)
-{
-	buf[0] = (unsigned char) (x >> 24);
-	buf[1] = (unsigned char) (x >> 16);
-	buf[2] = (unsigned char) (x >> 8);
-	buf[3] = (unsigned char) x;
-}
+		crc ^= crc32_le(test[i].crc, test_buf +
+		    test[i].start, test[i].length);
 
-/*
- * This checks that CRC(buf + CRC(buf)) = 0, and that
- * CRC commutes with bit-reversal.  This has the side effect
- * of bytewise bit-reversing the input buffer, and returns
- * the CRC of the reversed buffer.
- */
-static u32 test_step(u32 init, unsigned char *buf, size_t len)
-{
-	u32 crc1, crc2;
-	size_t i;
+		crc ^= crc32_be(test[i].crc, test_buf +
+		    test[i].start, test[i].length);
+	}
 
-	crc1 = crc32_be(init, buf, len);
-	store_be(crc1, buf + len);
-	crc2 = crc32_be(init, buf, len + 4);
-	if (crc2)
-		printf("\nCRC cancellation fail: 0x%08x should be 0\n",
-		       crc2);
-
-	for (i = 0; i <= len + 4; i++) {
-		crc2 = crc32_be(init, buf, i);
-		crc2 = crc32_be(crc2, buf + i, len + 4 - i);
-		if (crc2)
-			printf("\nCRC split fail: 0x%08x\n", crc2);
+	/* reduce OS noise */
+	local_irq_save(flags);
+	local_irq_disable();
+
+	getnstimeofday(&start);
+	for (i = 0; i < 100; i++) {
+		if (test[i].crc_le != crc32_le(test[i].crc, test_buf +
+		    test[i].start, test[i].length))
+			errors++;
+
+		if (test[i].crc_be != crc32_be(test[i].crc, test_buf +
+		    test[i].start, test[i].length))
+			errors++;
 	}
+	getnstimeofday(&stop);
+
+	local_irq_restore(flags);
+	local_irq_enable();
 
-	/* Now swap it around for the other test */
+	nsec = stop.tv_nsec - start.tv_nsec +
+		1000000000 * (stop.tv_sec - start.tv_sec);
 
-	bytereverse(buf, len + 4);
-	init = bitrev32(init);
-	crc2 = bitrev32(crc1);
-	if (crc1 != bitrev32(crc2))
-		printf("\nBit reversal fail: 0x%08x -> 0x%08x -> 0x%08x\n",
-		       crc1, crc2, bitrev32(crc2));
-	crc1 = crc32_le(init, buf, len);
-	if (crc1 != crc2)
-		printf("\nCRC endianness fail: 0x%08x != 0x%08x\n", crc1,
-		       crc2);
-	crc2 = crc32_le(init, buf, len + 4);
-	if (crc2)
-		printf("\nCRC cancellation fail: 0x%08x should be 0\n",
-		       crc2);
-
-	for (i = 0; i <= len + 4; i++) {
-		crc2 = crc32_le(init, buf, i);
-		crc2 = crc32_le(crc2, buf + i, len + 4 - i);
-		if (crc2)
-			printf("\nCRC split fail: 0x%08x\n", crc2);
+	pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d\n",
+		 CRC_LE_BITS, CRC_BE_BITS);
+
+	if (errors)
+		pr_warn("crc32: %d self tests failed\n", errors);
+	else {
+		pr_info("crc32: self tests passed, processed %d bytes in %lld nsec\n",
+			bytes, nsec);
 	}
 
-	return crc1;
+	return 0;
 }
 
-#define SIZE 64
-#define INIT1 0
-#define INIT2 0
-
-int main(void)
+static void __exit crc32_exit(void)
 {
-	unsigned char buf1[SIZE + 4];
-	unsigned char buf2[SIZE + 4];
-	unsigned char buf3[SIZE + 4];
-	int i, j;
-	u32 crc1, crc2, crc3;
-
-	for (i = 0; i <= SIZE; i++) {
-		printf("\rTesting length %d...", i);
-		fflush(stdout);
-		random_garbage(buf1, i);
-		random_garbage(buf2, i);
-		for (j = 0; j < i; j++)
-			buf3[j] = buf1[j] ^ buf2[j];
-
-		crc1 = test_step(INIT1, buf1, i);
-		crc2 = test_step(INIT2, buf2, i);
-		/* Now check that CRC(buf1 ^ buf2) = CRC(buf1) ^ CRC(buf2) */
-		crc3 = test_step(INIT1 ^ INIT2, buf3, i);
-		if (crc3 != (crc1 ^ crc2))
-			printf("CRC XOR fail: 0x%08x != 0x%08x ^ 0x%08x\n",
-			       crc3, crc1, crc2);
-	}
-	printf("\nAll test complete.  No failures expected.\n");
-	return 0;
 }
 
-#endif				/* UNITTEST */
+module_init(crc32_init);
+module_exit(crc32_exit);
+#endif /* CONFIG_CRC32_SELFTEST */

lib/Kconfig +10 -0

Index: infiniband/lib/Kconfig
===================================================================
@@ -60,6 +60,16 @@ config CRC32
 	  kernel tree does. Such modules that use library CRC32 functions
 	  require M here.
 
+config CRC32_SELFTEST
+	bool "CRC32 perform self test on init"
+	default n
+	depends on CRC32
+	help
+	  This option enables the CRC32 library functions to perform a
+	  self test on initialization. The self test computes crc32_le
+	  and crc32_be over byte strings with random alignment and length
+	  and computes the total elapsed time and number of bytes processed.
+
 config CRC7
 	tristate "CRC7 functions"
 	help