58 crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])  argument
61 #  define DO_CRC(x) crc = t0[(crc ^ (x)) & 255] ^ (crc >> 8)
67 #  define DO_CRC(x) crc = t0[((crc >> 24) ^ (x)) & 255] ^ (crc << 8)
106 		q = crc ^ *++b; /* use pre increment for speed */
108 		crc = DO_CRC4;
110 		crc = DO_CRC8;
112 		crc ^= DO_CRC4;
128 	return crc;
139  * @crc: seed value for computation.  ~0 for Ethernet, sometimes 0 for other
146 static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p,  argument
153 		crc ^= *p++;
155 			crc = (crc >> 1) ^ ((crc & 1) ? polynomial : 0);
159 		crc ^= *p++;
160 		crc = (crc >> 2) ^ tab[0][crc & 3];
161 		crc = (crc >> 2) ^ tab[0][crc & 3];
162 		crc = (crc >> 2) ^ tab[0][crc & 3];
163 		crc = (crc >> 2) ^ tab[0][crc & 3];
167 		crc ^= *p++;
168 		crc = (crc >> 4) ^ tab[0][crc & 15];
169 		crc = (crc >> 4) ^ tab[0][crc & 15];
174 		crc ^= *p++;
175 		crc = (crc >> 8) ^ tab[0][crc & 255];
178 	crc = (__force u32) __cpu_to_le32(crc);
179 	crc = crc32_body(crc, p, len, tab);
180 	crc = __le32_to_cpu((__force __le32)crc);
182 	return crc;
186 u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)  argument
188 	return crc32_le_generic(crc, p, len, NULL, CRC32_POLY_LE);
190 u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)  argument
192 	return crc32_le_generic(crc, p, len, NULL, CRC32C_POLY_LE);
195 u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)  argument
197 	return crc32_le_generic(crc, p, len,
200 u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)  argument
202 	return crc32_le_generic(crc, p, len,
211  * This follows the "little-endian" CRC convention that the lsbit
229  * crc32_generic_shift - Append @len 0 bytes to crc, in logarithmic time
230  * @crc: The original little-endian CRC (i.e. lsbit is x^31 coefficient)
231  * @len: The number of bytes. @crc is multiplied by x^(8*@len)
234  * It's possible to parallelize CRC computations by computing a CRC
236  * This shifts the given CRC by 8*len bits (i.e. produces the same effect
240 static u32 __attribute_const__ crc32_generic_shift(u32 crc, size_t len,  argument
243 	u32 power = polynomial;	/* CRC of x^32 */
248 		crc = (crc >> 1) ^ (crc & 1 ? polynomial : 0);
252 		return crc;
257 			crc = gf2_multiply(crc, power, polynomial);
267 	return crc;
270 u32 __attribute_const__ crc32_le_shift(u32 crc, size_t len)  argument
272 	return crc32_generic_shift(crc, len, CRC32_POLY_LE);
275 u32 __attribute_const__ __crc32c_le_shift(u32 crc, size_t len)  argument
277 	return crc32_generic_shift(crc, len, CRC32C_POLY_LE);
284  * @crc: seed value for computation.  ~0 for Ethernet, sometimes 0 for
291 static inline u32 __pure crc32_be_generic(u32 crc, unsigned char const *p,  argument
298 		crc ^= *p++ << 24;
300 			crc =
301 			    (crc << 1) ^ ((crc & 0x80000000) ? polynomial :
306 		crc ^= *p++ << 24;
307 		crc = (crc << 2) ^ tab[0][crc >> 30];
308 		crc = (crc << 2) ^ tab[0][crc >> 30];
309 		crc = (crc << 2) ^ tab[0][crc >> 30];
310 		crc = (crc << 2) ^ tab[0][crc >> 30];
314 		crc ^= *p++ << 24;
315 		crc = (crc << 4) ^ tab[0][crc >> 28];
316 		crc = (crc << 4) ^ tab[0][crc >> 28];
320 		crc ^= *p++ << 24;
321 		crc = (crc << 8) ^ tab[0][crc >> 24];
324 	crc = (__force u32) __cpu_to_be32(crc);
325 	crc = crc32_body(crc, p, len, tab);
326 	crc = __be32_to_cpu((__force __be32)crc);
328 	return crc;
332 u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)  argument
334 	return crc32_be_generic(crc, p, len, NULL, CRC32_POLY_BE);
337 u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)  argument
339 	return crc32_be_generic(crc, p, len,