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lib/crc32.c 45.4 KB
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  /*
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   * Aug 8, 2011 Bob Pearson with help from Joakim Tjernlund and George Spelvin
   * cleaned up code to current version of sparse and added the slicing-by-8
   * algorithm to the closely similar existing slicing-by-4 algorithm.
   *
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   * Oct 15, 2000 Matt Domsch <Matt_Domsch@dell.com>
   * Nicer crc32 functions/docs submitted by linux@horizon.com.  Thanks!
   * Code was from the public domain, copyright abandoned.  Code was
   * subsequently included in the kernel, thus was re-licensed under the
   * GNU GPL v2.
   *
   * Oct 12, 2000 Matt Domsch <Matt_Domsch@dell.com>
   * Same crc32 function was used in 5 other places in the kernel.
   * I made one version, and deleted the others.
   * There are various incantations of crc32().  Some use a seed of 0 or ~0.
   * Some xor at the end with ~0.  The generic crc32() function takes
   * seed as an argument, and doesn't xor at the end.  Then individual
   * users can do whatever they need.
   *   drivers/net/smc9194.c uses seed ~0, doesn't xor with ~0.
   *   fs/jffs2 uses seed 0, doesn't xor with ~0.
   *   fs/partitions/efi.c uses seed ~0, xor's with ~0.
   *
   * This source code is licensed under the GNU General Public License,
   * Version 2.  See the file COPYING for more details.
   */
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  /* see: Documentation/crc32.txt for a description of algorithms */
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  #include <linux/crc32.h>
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  #include <linux/module.h>
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  #include <linux/types.h>
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  #include <linux/sched.h>
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  #include "crc32defs.h"
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  #if CRC_LE_BITS > 8
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  # define tole(x) ((__force u32) cpu_to_le32(x))
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  #else
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  # define tole(x) (x)
  #endif
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  #if CRC_BE_BITS > 8
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  # define tobe(x) ((__force u32) cpu_to_be32(x))
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  #else
  # define tobe(x) (x)
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  #endif
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  #include "crc32table.h"
  
  MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>");
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  MODULE_DESCRIPTION("Various CRC32 calculations");
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  MODULE_LICENSE("GPL");
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  #if CRC_LE_BITS > 8 || CRC_BE_BITS > 8
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  /* implements slicing-by-4 or slicing-by-8 algorithm */
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  static inline u32 __pure
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  crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
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  {
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  # ifdef __LITTLE_ENDIAN
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  #  define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8)
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  #  define DO_CRC4 (t3[(q) & 255] ^ t2[(q >> 8) & 255] ^ \
  		   t1[(q >> 16) & 255] ^ t0[(q >> 24) & 255])
  #  define DO_CRC8 (t7[(q) & 255] ^ t6[(q >> 8) & 255] ^ \
  		   t5[(q >> 16) & 255] ^ t4[(q >> 24) & 255])
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  # else
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  #  define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
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  #  define DO_CRC4 (t0[(q) & 255] ^ t1[(q >> 8) & 255] ^ \
  		   t2[(q >> 16) & 255] ^ t3[(q >> 24) & 255])
  #  define DO_CRC8 (t4[(q) & 255] ^ t5[(q >> 8) & 255] ^ \
  		   t6[(q >> 16) & 255] ^ t7[(q >> 24) & 255])
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  # endif
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  	const u32 *b;
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  	size_t    rem_len;
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  # ifdef CONFIG_X86
  	size_t i;
  # endif
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  	const u32 *t0=tab[0], *t1=tab[1], *t2=tab[2], *t3=tab[3];
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  # if CRC_LE_BITS != 32
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  	const u32 *t4 = tab[4], *t5 = tab[5], *t6 = tab[6], *t7 = tab[7];
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  # endif
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  	u32 q;
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  	/* Align it */
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  	if (unlikely((long)buf & 3 && len)) {
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  		do {
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  			DO_CRC(*buf++);
  		} while ((--len) && ((long)buf)&3);
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  	}
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  # if CRC_LE_BITS == 32
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  	rem_len = len & 3;
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  	len = len >> 2;
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  # else
  	rem_len = len & 7;
  	len = len >> 3;
  # endif
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  	b = (const u32 *)buf;
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  # ifdef CONFIG_X86
  	--b;
  	for (i = 0; i < len; i++) {
  # else
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  	for (--b; len; --len) {
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  # endif
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  		q = crc ^ *++b; /* use pre increment for speed */
  # if CRC_LE_BITS == 32
  		crc = DO_CRC4;
  # else
  		crc = DO_CRC8;
  		q = *++b;
  		crc ^= DO_CRC4;
  # endif
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  	}
  	len = rem_len;
  	/* And the last few bytes */
  	if (len) {
  		u8 *p = (u8 *)(b + 1) - 1;
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  # ifdef CONFIG_X86
  		for (i = 0; i < len; i++)
  			DO_CRC(*++p); /* use pre increment for speed */
  # else
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  		do {
  			DO_CRC(*++p); /* use pre increment for speed */
  		} while (--len);
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  # endif
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  	}
  	return crc;
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  #undef DO_CRC
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  #undef DO_CRC4
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  #undef DO_CRC8
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  }
  #endif
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  /**
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   * crc32_le_generic() - Calculate bitwise little-endian Ethernet AUTODIN II
   *			CRC32/CRC32C
   * @crc: seed value for computation.  ~0 for Ethernet, sometimes 0 for other
   *	 uses, or the previous crc32/crc32c value if computing incrementally.
   * @p: pointer to buffer over which CRC32/CRC32C is run
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   * @len: length of buffer @p
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   * @tab: little-endian Ethernet table
   * @polynomial: CRC32/CRC32c LE polynomial
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   */
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  static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p,
  					  size_t len, const u32 (*tab)[256],
  					  u32 polynomial)
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  {
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  #if CRC_LE_BITS == 1
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  	int i;
  	while (len--) {
  		crc ^= *p++;
  		for (i = 0; i < 8; i++)
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  			crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
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  	}
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  # elif CRC_LE_BITS == 2
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  	while (len--) {
  		crc ^= *p++;
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  		crc = (crc >> 2) ^ tab[0][crc & 3];
  		crc = (crc >> 2) ^ tab[0][crc & 3];
  		crc = (crc >> 2) ^ tab[0][crc & 3];
  		crc = (crc >> 2) ^ tab[0][crc & 3];
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  	}
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  # elif CRC_LE_BITS == 4
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  	while (len--) {
  		crc ^= *p++;
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  		crc = (crc >> 4) ^ tab[0][crc & 15];
  		crc = (crc >> 4) ^ tab[0][crc & 15];
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  	}
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  # elif CRC_LE_BITS == 8
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  	/* aka Sarwate algorithm */
  	while (len--) {
  		crc ^= *p++;
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  		crc = (crc >> 8) ^ tab[0][crc & 255];
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  	}
  # else
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  	crc = (__force u32) __cpu_to_le32(crc);
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  	crc = crc32_body(crc, p, len, tab);
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  	crc = __le32_to_cpu((__force __le32)crc);
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  #endif
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  	return crc;
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  }
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  #if CRC_LE_BITS == 1
  u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
  {
  	return crc32_le_generic(crc, p, len, NULL, CRCPOLY_LE);
  }
  u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)
  {
  	return crc32_le_generic(crc, p, len, NULL, CRC32C_POLY_LE);
  }
  #else
  u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
  {
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  	return crc32_le_generic(crc, p, len,
  			(const u32 (*)[256])crc32table_le, CRCPOLY_LE);
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  }
  u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)
  {
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  	return crc32_le_generic(crc, p, len,
  			(const u32 (*)[256])crc32ctable_le, CRC32C_POLY_LE);
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  }
  #endif
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  EXPORT_SYMBOL(crc32_le);
  EXPORT_SYMBOL(__crc32c_le);
  
  /*
   * This multiplies the polynomials x and y modulo the given modulus.
   * This follows the "little-endian" CRC convention that the lsbit
   * represents the highest power of x, and the msbit represents x^0.
   */
  static u32 __attribute_const__ gf2_multiply(u32 x, u32 y, u32 modulus)
  {
  	u32 product = x & 1 ? y : 0;
  	int i;
  
  	for (i = 0; i < 31; i++) {
  		product = (product >> 1) ^ (product & 1 ? modulus : 0);
  		x >>= 1;
  		product ^= x & 1 ? y : 0;
  	}
  
  	return product;
  }
  
  /**
   * crc32_generic_shift - Append len 0 bytes to crc, in logarithmic time
   * @crc: The original little-endian CRC (i.e. lsbit is x^31 coefficient)
   * @len: The number of bytes. @crc is multiplied by x^(8*@len)
   * @polynomial: The modulus used to reduce the result to 32 bits.
   *
   * It's possible to parallelize CRC computations by computing a CRC
   * over separate ranges of a buffer, then summing them.
   * This shifts the given CRC by 8*len bits (i.e. produces the same effect
   * as appending len bytes of zero to the data), in time proportional
   * to log(len).
   */
  static u32 __attribute_const__ crc32_generic_shift(u32 crc, size_t len,
  						   u32 polynomial)
  {
  	u32 power = polynomial;	/* CRC of x^32 */
  	int i;
  
  	/* Shift up to 32 bits in the simple linear way */
  	for (i = 0; i < 8 * (int)(len & 3); i++)
  		crc = (crc >> 1) ^ (crc & 1 ? polynomial : 0);
  
  	len >>= 2;
  	if (!len)
  		return crc;
  
  	for (;;) {
  		/* "power" is x^(2^i), modulo the polynomial */
  		if (len & 1)
  			crc = gf2_multiply(crc, power, polynomial);
  
  		len >>= 1;
  		if (!len)
  			break;
  
  		/* Square power, advancing to x^(2^(i+1)) */
  		power = gf2_multiply(power, power, polynomial);
  	}
  
  	return crc;
  }
  
  u32 __attribute_const__ crc32_le_shift(u32 crc, size_t len)
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  {
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  	return crc32_generic_shift(crc, len, CRCPOLY_LE);
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  }
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  u32 __attribute_const__ __crc32c_le_shift(u32 crc, size_t len)
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  {
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  	return crc32_generic_shift(crc, len, CRC32C_POLY_LE);
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  }
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  EXPORT_SYMBOL(crc32_le_shift);
  EXPORT_SYMBOL(__crc32c_le_shift);
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  /**
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   * crc32_be_generic() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32
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   * @crc: seed value for computation.  ~0 for Ethernet, sometimes 0 for
   *	other uses, or the previous crc32 value if computing incrementally.
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   * @p: pointer to buffer over which CRC32 is run
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   * @len: length of buffer @p
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   * @tab: big-endian Ethernet table
   * @polynomial: CRC32 BE polynomial
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   */
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  static inline u32 __pure crc32_be_generic(u32 crc, unsigned char const *p,
  					  size_t len, const u32 (*tab)[256],
  					  u32 polynomial)
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  {
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  #if CRC_BE_BITS == 1
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  	int i;
  	while (len--) {
  		crc ^= *p++ << 24;
  		for (i = 0; i < 8; i++)
  			crc =
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  			    (crc << 1) ^ ((crc & 0x80000000) ? polynomial :
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  					  0);
  	}
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  # elif CRC_BE_BITS == 2
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  	while (len--) {
  		crc ^= *p++ << 24;
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  		crc = (crc << 2) ^ tab[0][crc >> 30];
  		crc = (crc << 2) ^ tab[0][crc >> 30];
  		crc = (crc << 2) ^ tab[0][crc >> 30];
  		crc = (crc << 2) ^ tab[0][crc >> 30];
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  	}
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  # elif CRC_BE_BITS == 4
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  	while (len--) {
  		crc ^= *p++ << 24;
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  		crc = (crc << 4) ^ tab[0][crc >> 28];
  		crc = (crc << 4) ^ tab[0][crc >> 28];
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  	}
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  # elif CRC_BE_BITS == 8
9a1dbf6a2   Bob Pearson   crc32: make CRC_*...
312
313
  	while (len--) {
  		crc ^= *p++ << 24;
46c5801ea   Darrick J. Wong   crc32: bolt on cr...
314
  		crc = (crc << 8) ^ tab[0][crc >> 24];
9a1dbf6a2   Bob Pearson   crc32: make CRC_*...
315
316
  	}
  # else
ce4320ddd   Bob Pearson   crc32: fix mixing...
317
  	crc = (__force u32) __cpu_to_be32(crc);
60e58d5c9   Bob Pearson   crc32: miscellane...
318
  	crc = crc32_body(crc, p, len, tab);
ce4320ddd   Bob Pearson   crc32: fix mixing...
319
  	crc = __be32_to_cpu((__force __be32)crc);
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
320
  # endif
60e58d5c9   Bob Pearson   crc32: miscellane...
321
  	return crc;
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
322
  }
46c5801ea   Darrick J. Wong   crc32: bolt on cr...
323
324
325
326
327
328
329
330
331
  
  #if CRC_LE_BITS == 1
  u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
  {
  	return crc32_be_generic(crc, p, len, NULL, CRCPOLY_BE);
  }
  #else
  u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
  {
8f243af42   Joe Mario   sections: fix con...
332
333
  	return crc32_be_generic(crc, p, len,
  			(const u32 (*)[256])crc32table_be, CRCPOLY_BE);
46c5801ea   Darrick J. Wong   crc32: bolt on cr...
334
335
  }
  #endif
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
336
  EXPORT_SYMBOL(crc32_be);
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
337

3863ef31d   Bob Pearson   crc32: simplify u...
338
  #ifdef CONFIG_CRC32_SELFTEST
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
339

3863ef31d   Bob Pearson   crc32: simplify u...
340
  /* 4096 random bytes */
4fa8e03b2   George Spelvin   lib: crc32: Mark ...
341
  static u8 const __aligned(8) test_buf[] __initconst =
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
342
  {
3863ef31d   Bob Pearson   crc32: simplify u...
343
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731
732
733
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737
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740
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863
  	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,
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  	0x1b, 0xbd, 0x1e, 0x8c, 0x84, 0xb7, 0x7b, 0xe8,
  	0xd2, 0x2d, 0x09, 0x41, 0x41, 0x37, 0x3d, 0xb1,
  	0x6f, 0x26, 0x5d, 0x71, 0x16, 0x3d, 0xb7, 0x83,
  	0x27, 0x2c, 0xa7, 0xb6, 0x50, 0xbd, 0x91, 0x86,
  	0xab, 0x24, 0xa1, 0x38, 0xfd, 0xea, 0x71, 0x55,
  	0x7e, 0x9a, 0x07, 0x77, 0x4b, 0xfa, 0x61, 0x66,
  	0x20, 0x1e, 0x28, 0x95, 0x18, 0x1b, 0xa4, 0xa0,
  	0xfd, 0xc0, 0x89, 0x72, 0x43, 0xd9, 0x3b, 0x49,
  	0x5a, 0x3f, 0x9d, 0xbf, 0xdb, 0xb4, 0x46, 0xea,
  	0x42, 0x01, 0x77, 0x23, 0x68, 0x95, 0xb6, 0x24,
  	0xb3, 0xa8, 0x6c, 0x28, 0x3b, 0x11, 0x40, 0x7e,
  	0x18, 0x65, 0x6d, 0xd8, 0x24, 0x42, 0x7d, 0x88,
  	0xc0, 0x52, 0xd9, 0x05, 0xe4, 0x95, 0x90, 0x87,
  	0x8c, 0xf4, 0xd0, 0x6b, 0xb9, 0x83, 0x99, 0x34,
  	0x6d, 0xfe, 0x54, 0x40, 0x94, 0x52, 0x21, 0x4f,
  	0x14, 0x25, 0xc5, 0xd6, 0x5e, 0x95, 0xdc, 0x0a,
  	0x2b, 0x89, 0x20, 0x11, 0x84, 0x48, 0xd6, 0x3a,
  	0xcd, 0x5c, 0x24, 0xad, 0x62, 0xe3, 0xb1, 0x93,
  	0x25, 0x8d, 0xcd, 0x7e, 0xfc, 0x27, 0xa3, 0x37,
  	0xfd, 0x84, 0xfc, 0x1b, 0xb2, 0xf1, 0x27, 0x38,
  	0x5a, 0xb7, 0xfc, 0xf2, 0xfa, 0x95, 0x66, 0xd4,
  	0xfb, 0xba, 0xa7, 0xd7, 0xa3, 0x72, 0x69, 0x48,
  	0x48, 0x8c, 0xeb, 0x28, 0x89, 0xfe, 0x33, 0x65,
  	0x5a, 0x36, 0x01, 0x7e, 0x06, 0x79, 0x0a, 0x09,
  	0x3b, 0x74, 0x11, 0x9a, 0x6e, 0xbf, 0xd4, 0x9e,
  	0x58, 0x90, 0x49, 0x4f, 0x4d, 0x08, 0xd4, 0xe5,
  	0x4a, 0x09, 0x21, 0xef, 0x8b, 0xb8, 0x74, 0x3b,
  	0x91, 0xdd, 0x36, 0x85, 0x60, 0x2d, 0xfa, 0xd4,
  	0x45, 0x7b, 0x45, 0x53, 0xf5, 0x47, 0x87, 0x7e,
  	0xa6, 0x37, 0xc8, 0x78, 0x7a, 0x68, 0x9d, 0x8d,
  	0x65, 0x2c, 0x0e, 0x91, 0x5c, 0xa2, 0x60, 0xf0,
  	0x8e, 0x3f, 0xe9, 0x1a, 0xcd, 0xaa, 0xe7, 0xd5,
  	0x77, 0x18, 0xaf, 0xc9, 0xbc, 0x18, 0xea, 0x48,
  	0x1b, 0xfb, 0x22, 0x48, 0x70, 0x16, 0x29, 0x9e,
  	0x5b, 0xc1, 0x2c, 0x66, 0x23, 0xbc, 0xf0, 0x1f,
  	0xef, 0xaf, 0xe4, 0xd6, 0x04, 0x19, 0x82, 0x7a,
  	0x0b, 0xba, 0x4b, 0x46, 0xb1, 0x6a, 0x85, 0x5d,
  	0xb4, 0x73, 0xd6, 0x21, 0xa1, 0x71, 0x60, 0x14,
  	0xee, 0x0a, 0x77, 0xc4, 0x66, 0x2e, 0xf9, 0x69,
  	0x30, 0xaf, 0x41, 0x0b, 0xc8, 0x83, 0x3c, 0x53,
  	0x99, 0x19, 0x27, 0x46, 0xf7, 0x41, 0x6e, 0x56,
  	0xdc, 0x94, 0x28, 0x67, 0x4e, 0xb7, 0x25, 0x48,
  	0x8a, 0xc2, 0xe0, 0x60, 0x96, 0xcc, 0x18, 0xf4,
  	0x84, 0xdd, 0xa7, 0x5e, 0x3e, 0x05, 0x0b, 0x26,
  	0x26, 0xb2, 0x5c, 0x1f, 0x57, 0x1a, 0x04, 0x7e,
  	0x6a, 0xe3, 0x2f, 0xb4, 0x35, 0xb6, 0x38, 0x40,
  	0x40, 0xcd, 0x6f, 0x87, 0x2e, 0xef, 0xa3, 0xd7,
  	0xa9, 0xc2, 0xe8, 0x0d, 0x27, 0xdf, 0x44, 0x62,
  	0x99, 0xa0, 0xfc, 0xcf, 0x81, 0x78, 0xcb, 0xfe,
  	0xe5, 0xa0, 0x03, 0x4e, 0x6c, 0xd7, 0xf4, 0xaf,
  	0x7a, 0xbb, 0x61, 0x82, 0xfe, 0x71, 0x89, 0xb2,
  	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 */
577eba9e2   Darrick J. Wong   crc32: add self-t...
864
  	u32 crc32c_le;	/* expected crc32c_le result */
4fa8e03b2   George Spelvin   lib: crc32: Mark ...
865
  } const test[] __initconst =
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
866
  {
d921e049a   Daniel Borkmann   lib: crc32: clean...
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  	{0x674bf11d, 0x00000038, 0x00000542, 0x0af6d466, 0xd8b6e4c1, 0xf6e93d6c},
  	{0x35c672c6, 0x0000003a, 0x000001aa, 0xc6d3dfba, 0x28aaf3ad, 0x0fe92aca},
  	{0x496da28e, 0x00000039, 0x000005af, 0xd933660f, 0x5d57e81f, 0x52e1ebb8},
  	{0x09a9b90e, 0x00000027, 0x000001f8, 0xb45fe007, 0xf45fca9a, 0x0798af9a},
  	{0xdc97e5a9, 0x00000025, 0x000003b6, 0xf81a3562, 0xe0126ba2, 0x18eb3152},
  	{0x47c58900, 0x0000000a, 0x000000b9, 0x8e58eccf, 0xf3afc793, 0xd00d08c7},
  	{0x292561e8, 0x0000000c, 0x00000403, 0xa2ba8aaf, 0x0b797aed, 0x8ba966bc},
  	{0x415037f6, 0x00000003, 0x00000676, 0xa17d52e8, 0x7f0fdf35, 0x11d694a2},
  	{0x3466e707, 0x00000026, 0x00000042, 0x258319be, 0x75c484a2, 0x6ab3208d},
  	{0xafd1281b, 0x00000023, 0x000002ee, 0x4428eaf8, 0x06c7ad10, 0xba4603c5},
  	{0xd3857b18, 0x00000028, 0x000004a2, 0x5c430821, 0xb062b7cb, 0xe6071c6f},
  	{0x1d825a8f, 0x0000002b, 0x0000050b, 0xd2c45f0c, 0xd68634e0, 0x179ec30a},
  	{0x5033e3bc, 0x0000000b, 0x00000078, 0xa3ea4113, 0xac6d31fb, 0x0903beb8},
  	{0x94f1fb5e, 0x0000000f, 0x000003a2, 0xfbfc50b1, 0x3cfe50ed, 0x6a7cb4fa},
  	{0xc9a0fe14, 0x00000009, 0x00000473, 0x5fb61894, 0x87070591, 0xdb535801},
  	{0x88a034b1, 0x0000001c, 0x000005ad, 0xc1b16053, 0x46f95c67, 0x92bed597},
  	{0xf0f72239, 0x00000020, 0x0000026d, 0xa6fa58f3, 0xf8c2c1dd, 0x192a3f1b},
  	{0xcc20a5e3, 0x0000003b, 0x0000067a, 0x7740185a, 0x308b979a, 0xccbaec1a},
  	{0xce589c95, 0x0000002b, 0x00000641, 0xd055e987, 0x40aae25b, 0x7eabae4d},
  	{0x78edc885, 0x00000035, 0x000005be, 0xa39cb14b, 0x035b0d1f, 0x28c72982},
  	{0x9d40a377, 0x0000003b, 0x00000038, 0x1f47ccd2, 0x197fbc9d, 0xc3cd4d18},
  	{0x703d0e01, 0x0000003c, 0x000006f1, 0x88735e7c, 0xfed57c5a, 0xbca8f0e7},
  	{0x776bf505, 0x0000000f, 0x000005b2, 0x5cc4fc01, 0xf32efb97, 0x713f60b3},
  	{0x4a3e7854, 0x00000027, 0x000004b8, 0x8d923c82, 0x0cbfb4a2, 0xebd08fd5},
  	{0x209172dd, 0x0000003b, 0x00000356, 0xb89e9c2b, 0xd7868138, 0x64406c59},
  	{0x3ba4cc5b, 0x0000002f, 0x00000203, 0xe51601a9, 0x5b2a1032, 0x7421890e},
  	{0xfc62f297, 0x00000000, 0x00000079, 0x71a8e1a2, 0x5d88685f, 0xe9347603},
  	{0x64280b8b, 0x00000016, 0x000007ab, 0x0fa7a30c, 0xda3a455f, 0x1bef9060},
  	{0x97dd724b, 0x00000033, 0x000007ad, 0x5788b2f4, 0xd7326d32, 0x34720072},
  	{0x61394b52, 0x00000035, 0x00000571, 0xc66525f1, 0xcabe7fef, 0x48310f59},
  	{0x29b4faff, 0x00000024, 0x0000006e, 0xca13751e, 0x993648e0, 0x783a4213},
  	{0x29bfb1dc, 0x0000000b, 0x00000244, 0x436c43f7, 0x429f7a59, 0x9e8efd41},
  	{0x86ae934b, 0x00000035, 0x00000104, 0x0760ec93, 0x9cf7d0f4, 0xfc3d34a5},
  	{0xc4c1024e, 0x0000002e, 0x000006b1, 0x6516a3ec, 0x19321f9c, 0x17a52ae2},
  	{0x3287a80a, 0x00000026, 0x00000496, 0x0b257eb1, 0x754ebd51, 0x886d935a},
  	{0xa4db423e, 0x00000023, 0x0000045d, 0x9b3a66dc, 0x873e9f11, 0xeaaeaeb2},
  	{0x7a1078df, 0x00000015, 0x0000014a, 0x8c2484c5, 0x6a628659, 0x8e900a4b},
  	{0x6048bd5b, 0x00000006, 0x0000006a, 0x897e3559, 0xac9961af, 0xd74662b1},
  	{0xd8f9ea20, 0x0000003d, 0x00000277, 0x60eb905b, 0xed2aaf99, 0xd26752ba},
  	{0xea5ec3b4, 0x0000002a, 0x000004fe, 0x869965dc, 0x6c1f833b, 0x8b1fcd62},
  	{0x2dfb005d, 0x00000016, 0x00000345, 0x6a3b117e, 0xf05e8521, 0xf54342fe},
  	{0x5a214ade, 0x00000020, 0x000005b6, 0x467f70be, 0xcb22ccd3, 0x5b95b988},
  	{0xf0ab9cca, 0x00000032, 0x00000515, 0xed223df3, 0x7f3ef01d, 0x2e1176be},
  	{0x91b444f9, 0x0000002e, 0x000007f8, 0x84e9a983, 0x5676756f, 0x66120546},
  	{0x1b5d2ddb, 0x0000002e, 0x0000012c, 0xba638c4c, 0x3f42047b, 0xf256a5cc},
  	{0xd824d1bb, 0x0000003a, 0x000007b5, 0x6288653b, 0x3a3ebea0, 0x4af1dd69},
  	{0x0470180c, 0x00000034, 0x000001f0, 0x9d5b80d6, 0x3de08195, 0x56f0a04a},
  	{0xffaa3a3f, 0x00000036, 0x00000299, 0xf3a82ab8, 0x53e0c13d, 0x74f6b6b2},
  	{0x6406cfeb, 0x00000023, 0x00000600, 0xa920b8e8, 0xe4e2acf4, 0x085951fd},
  	{0xb24aaa38, 0x0000003e, 0x000004a1, 0x657cc328, 0x5077b2c3, 0xc65387eb},
  	{0x58b2ab7c, 0x00000039, 0x000002b4, 0x3a17ee7e, 0x9dcb3643, 0x1ca9257b},
  	{0x3db85970, 0x00000006, 0x000002b6, 0x95268b59, 0xb9812c10, 0xfd196d76},
  	{0x857830c5, 0x00000003, 0x00000590, 0x4ef439d5, 0xf042161d, 0x5ef88339},
  	{0xe1fcd978, 0x0000003e, 0x000007d8, 0xae8d8699, 0xce0a1ef5, 0x2c3714d9},
  	{0xb982a768, 0x00000016, 0x000006e0, 0x62fad3df, 0x5f8a067b, 0x58576548},
  	{0x1d581ce8, 0x0000001e, 0x0000058b, 0xf0f5da53, 0x26e39eee, 0xfd7c57de},
  	{0x2456719b, 0x00000025, 0x00000503, 0x4296ac64, 0xd50e4c14, 0xd5fedd59},
  	{0xfae6d8f2, 0x00000000, 0x0000055d, 0x057fdf2e, 0x2a31391a, 0x1cc3b17b},
  	{0xcba828e3, 0x00000039, 0x000002ce, 0xe3f22351, 0x8f00877b, 0x270eed73},
  	{0x13d25952, 0x0000000a, 0x0000072d, 0x76d4b4cc, 0x5eb67ec3, 0x91ecbb11},
  	{0x0342be3f, 0x00000015, 0x00000599, 0xec75d9f1, 0x9d4d2826, 0x05ed8d0c},
  	{0xeaa344e0, 0x00000014, 0x000004d8, 0x72a4c981, 0x2064ea06, 0x0b09ad5b},
  	{0xbbb52021, 0x0000003b, 0x00000272, 0x04af99fc, 0xaf042d35, 0xf8d511fb},
  	{0xb66384dc, 0x0000001d, 0x000007fc, 0xd7629116, 0x782bd801, 0x5ad832cc},
  	{0x616c01b6, 0x00000022, 0x000002c8, 0x5b1dab30, 0x783ce7d2, 0x1214d196},
  	{0xce2bdaad, 0x00000016, 0x0000062a, 0x932535c8, 0x3f02926d, 0x5747218a},
  	{0x00fe84d7, 0x00000005, 0x00000205, 0x850e50aa, 0x753d649c, 0xde8f14de},
  	{0xbebdcb4c, 0x00000006, 0x0000055d, 0xbeaa37a2, 0x2d8c9eba, 0x3563b7b9},
  	{0xd8b1a02a, 0x00000010, 0x00000387, 0x5017d2fc, 0x503541a5, 0x071475d0},
  	{0x3b96cad2, 0x00000036, 0x00000347, 0x1d2372ae, 0x926cd90b, 0x54c79d60},
  	{0xc94c1ed7, 0x00000005, 0x0000038b, 0x9e9fdb22, 0x144a9178, 0x4c53eee6},
  	{0x1aad454e, 0x00000025, 0x000002b2, 0xc3f6315c, 0x5c7a35b3, 0x10137a3c},
  	{0xa4fec9a6, 0x00000000, 0x000006d6, 0x90be5080, 0xa4107605, 0xaa9d6c73},
  	{0x1bbe71e2, 0x0000001f, 0x000002fd, 0x4e504c3b, 0x284ccaf1, 0xb63d23e7},
  	{0x4201c7e4, 0x00000002, 0x000002b7, 0x7822e3f9, 0x0cc912a9, 0x7f53e9cf},
  	{0x23fddc96, 0x00000003, 0x00000627, 0x8a385125, 0x07767e78, 0x13c1cd83},
  	{0xd82ba25c, 0x00000016, 0x0000063e, 0x98e4148a, 0x283330c9, 0x49ff5867},
  	{0x786f2032, 0x0000002d, 0x0000060f, 0xf201600a, 0xf561bfcd, 0x8467f211},
  	{0xfebe4e1f, 0x0000002a, 0x000004f2, 0x95e51961, 0xfd80dcab, 0x3f9683b2},
  	{0x1a6e0a39, 0x00000008, 0x00000672, 0x8af6c2a5, 0x78dd84cb, 0x76a3f874},
  	{0x56000ab8, 0x0000000e, 0x000000e5, 0x36bacb8f, 0x22ee1f77, 0x863b702f},
  	{0x4717fe0c, 0x00000000, 0x000006ec, 0x8439f342, 0x5c8e03da, 0xdc6c58ff},
  	{0xd5d5d68e, 0x0000003c, 0x000003a3, 0x46fff083, 0x177d1b39, 0x0622cc95},
  	{0xc25dd6c6, 0x00000024, 0x000006c0, 0x5ceb8eb4, 0x892b0d16, 0xe85605cd},
  	{0xe9b11300, 0x00000023, 0x00000683, 0x07a5d59a, 0x6c6a3208, 0x31da5f06},
  	{0x95cd285e, 0x00000001, 0x00000047, 0x7b3a4368, 0x0202c07e, 0xa1f2e784},
  	{0xd9245a25, 0x0000001e, 0x000003a6, 0xd33c1841, 0x1936c0d5, 0xb07cc616},
  	{0x103279db, 0x00000006, 0x0000039b, 0xca09b8a0, 0x77d62892, 0xbf943b6c},
  	{0x1cba3172, 0x00000027, 0x000001c8, 0xcb377194, 0xebe682db, 0x2c01af1c},
  	{0x8f613739, 0x0000000c, 0x000001df, 0xb4b0bc87, 0x7710bd43, 0x0fe5f56d},
  	{0x1c6aa90d, 0x0000001b, 0x0000053c, 0x70559245, 0xda7894ac, 0xf8943b2d},
  	{0xaabe5b93, 0x0000003d, 0x00000715, 0xcdbf42fa, 0x0c3b99e7, 0xe4d89272},
  	{0xf15dd038, 0x00000006, 0x000006db, 0x6e104aea, 0x8d5967f2, 0x7c2f6bbb},
  	{0x584dd49c, 0x00000020, 0x000007bc, 0x36b6cfd6, 0xad4e23b2, 0xabbf388b},
  	{0x5d8c9506, 0x00000020, 0x00000470, 0x4c62378e, 0x31d92640, 0x1dca1f4e},
  	{0xb80d17b0, 0x00000032, 0x00000346, 0x22a5bb88, 0x9a7ec89f, 0x5c170e23},
  	{0xdaf0592e, 0x00000023, 0x000007b0, 0x3cab3f99, 0x9b1fdd99, 0xc0e9d672},
  	{0x4793cc85, 0x0000000d, 0x00000706, 0xe82e04f6, 0xed3db6b7, 0xc18bdc86},
  	{0x82ebf64e, 0x00000009, 0x000007c3, 0x69d590a9, 0x9efa8499, 0xa874fcdd},
  	{0xb18a0319, 0x00000026, 0x000007db, 0x1cf98dcc, 0x8fa9ad6a, 0x9dc0bb48},
3863ef31d   Bob Pearson   crc32: simplify u...
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  };
  
  #include <linux/time.h>
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  static int __init crc32c_test(void)
  {
  	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;
  
  		crc ^= __crc32c_le(test[i].crc, test_buf +
  		    test[i].start, test[i].length);
  	}
  
  	/* reduce OS noise */
  	local_irq_save(flags);
  	local_irq_disable();
  
  	getnstimeofday(&start);
  	for (i = 0; i < 100; i++) {
  		if (test[i].crc32c_le != __crc32c_le(test[i].crc, test_buf +
  		    test[i].start, test[i].length))
  			errors++;
  	}
  	getnstimeofday(&stop);
  
  	local_irq_restore(flags);
  	local_irq_enable();
  
  	nsec = stop.tv_nsec - start.tv_nsec +
  		1000000000 * (stop.tv_sec - start.tv_sec);
  
  	pr_info("crc32c: CRC_LE_BITS = %d
  ", CRC_LE_BITS);
  
  	if (errors)
  		pr_warn("crc32c: %d self tests failed
  ", errors);
  	else {
  		pr_info("crc32c: self tests passed, processed %d bytes in %lld nsec
  ",
  			bytes, nsec);
  	}
  
  	return 0;
  }
efba721f6   Daniel Borkmann   lib: crc32: add t...
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  static int __init crc32c_combine_test(void)
  {
  	int i, j;
  	int errors = 0, runs = 0;
165148396   Daniel Borkmann   lib: crc32: reduc...
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  	for (i = 0; i < 10; i++) {
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  		u32 crc_full;
  
  		crc_full = __crc32c_le(test[i].crc, test_buf + test[i].start,
  				       test[i].length);
  		for (j = 0; j <= test[i].length; ++j) {
  			u32 crc1, crc2;
  			u32 len1 = j, len2 = test[i].length - j;
  
  			crc1 = __crc32c_le(test[i].crc, test_buf +
  					   test[i].start, len1);
  			crc2 = __crc32c_le(0, test_buf + test[i].start +
  					   len1, len2);
  
  			if (!(crc_full == __crc32c_le_combine(crc1, crc2, len2) &&
  			      crc_full == test[i].crc32c_le))
  				errors++;
  			runs++;
cc0ac1999   Daniel Borkmann   lib: crc32: condi...
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  			cond_resched();
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  		}
  	}
  
  	if (errors)
  		pr_warn("crc32c_combine: %d/%d self tests failed
  ", errors, runs);
  	else
  		pr_info("crc32c_combine: %d self tests passed
  ", runs);
  
  	return 0;
  }
577eba9e2   Darrick J. Wong   crc32: add self-t...
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  static int __init crc32_test(void)
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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  {
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  	int i;
  	int errors = 0;
  	int bytes = 0;
  	struct timespec start, stop;
  	u64 nsec;
  	unsigned long flags;
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  	/* keep static to prevent cache warming code from
  	 * getting eliminated by the compiler */
  	static u32 crc;
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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3863ef31d   Bob Pearson   crc32: simplify u...
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  	/* pre-warm the cache */
  	for (i = 0; i < 100; i++) {
  		bytes += 2*test[i].length;
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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  		crc ^= crc32_le(test[i].crc, test_buf +
  		    test[i].start, test[i].length);
  
  		crc ^= crc32_be(test[i].crc, test_buf +
  		    test[i].start, test[i].length);
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  	}
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  	/* 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++;
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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  	}
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  	getnstimeofday(&stop);
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  	local_irq_restore(flags);
  	local_irq_enable();
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3863ef31d   Bob Pearson   crc32: simplify u...
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  	nsec = stop.tv_nsec - start.tv_nsec +
  		1000000000 * (stop.tv_sec - start.tv_sec);
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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  	pr_info("crc32: CRC_LE_BITS = %d, CRC_BE BITS = %d
  ",
  		 CRC_LE_BITS, CRC_BE_BITS);
  
  	if (errors)
  		pr_warn("crc32: %d self tests failed
  ", errors);
  	else {
  		pr_info("crc32: self tests passed, processed %d bytes in %lld nsec
  ",
  			bytes, nsec);
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2
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  	}
3863ef31d   Bob Pearson   crc32: simplify u...
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  	return 0;
  }
efba721f6   Daniel Borkmann   lib: crc32: add t...
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  static int __init crc32_combine_test(void)
  {
  	int i, j;
  	int errors = 0, runs = 0;
165148396   Daniel Borkmann   lib: crc32: reduc...
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  	for (i = 0; i < 10; i++) {
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  		u32 crc_full;
  
  		crc_full = crc32_le(test[i].crc, test_buf + test[i].start,
  				    test[i].length);
  		for (j = 0; j <= test[i].length; ++j) {
  			u32 crc1, crc2;
  			u32 len1 = j, len2 = test[i].length - j;
  
  			crc1 = crc32_le(test[i].crc, test_buf +
  					test[i].start, len1);
  			crc2 = crc32_le(0, test_buf + test[i].start +
  					len1, len2);
  
  			if (!(crc_full == crc32_le_combine(crc1, crc2, len2) &&
  			      crc_full == test[i].crc_le))
  				errors++;
  			runs++;
cc0ac1999   Daniel Borkmann   lib: crc32: condi...
1140
  			cond_resched();
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  		}
  	}
  
  	if (errors)
  		pr_warn("crc32_combine: %d/%d self tests failed
  ", errors, runs);
  	else
  		pr_info("crc32_combine: %d self tests passed
  ", runs);
  
  	return 0;
  }
577eba9e2   Darrick J. Wong   crc32: add self-t...
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  static int __init crc32test_init(void)
  {
  	crc32_test();
  	crc32c_test();
efba721f6   Daniel Borkmann   lib: crc32: add t...
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  	crc32_combine_test();
  	crc32c_combine_test();
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  	return 0;
  }
3863ef31d   Bob Pearson   crc32: simplify u...
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  static void __exit crc32_exit(void)
  {
  }
577eba9e2   Darrick J. Wong   crc32: add self-t...
1165
  module_init(crc32test_init);
3863ef31d   Bob Pearson   crc32: simplify u...
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  module_exit(crc32_exit);
  #endif /* CONFIG_CRC32_SELFTEST */