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Commit e37f2f93 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Herbert Xu
Browse files

lib/crc: Use consistent naming for CRC-32 polynomials 



Header was defining CRCPOLY_LE/BE and CRC32C_POLY_LE but in fact all of
them are CRC-32 polynomials so use consistent naming.

Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 1fb2e3f2

include/linux/crc32poly.h

+2 −2
Original line number Diff line number Diff line
@@ -7,8 +7,8 @@ 
 * *the* standard CRC-32 polynomial, first popularized by Ethernet.

 * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x^1+x^0

 */

#define CRCPOLY_LE 0xedb88320

#define CRCPOLY_BE 0x04c11db7

#define CRC32_POLY_LE 0xedb88320

#define CRC32_POLY_BE 0x04c11db7



/*

 * This is the CRC32c polynomial, as outlined by Castagnoli.

lib/crc32.c

+5 −5
Original line number Diff line number Diff line
@@ -185,7 +185,7 @@ static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p, 
#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);

	return crc32_le_generic(crc, p, len, NULL, CRC32_POLY_LE);

}

u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)

{
@@ -195,7 +195,7 @@ u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len) 
u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)

{

	return crc32_le_generic(crc, p, len,

			(const u32 (*)[256])crc32table_le, CRCPOLY_LE);

			(const u32 (*)[256])crc32table_le, CRC32_POLY_LE);

}

u32 __pure __crc32c_le(u32 crc, unsigned char const *p, size_t len)

{
@@ -269,7 +269,7 @@ static u32 __attribute_const__ crc32_generic_shift(u32 crc, size_t len, 


u32 __attribute_const__ crc32_le_shift(u32 crc, size_t len)

{

	return crc32_generic_shift(crc, len, CRCPOLY_LE);

	return crc32_generic_shift(crc, len, CRC32_POLY_LE);

}



u32 __attribute_const__ __crc32c_le_shift(u32 crc, size_t len)
@@ -331,13 +331,13 @@ static inline u32 __pure crc32_be_generic(u32 crc, unsigned char const *p, 
#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);

	return crc32_be_generic(crc, p, len, NULL, CRC32_POLY_BE);

}

#else

u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)

{

	return crc32_be_generic(crc, p, len,

			(const u32 (*)[256])crc32table_be, CRCPOLY_BE);

			(const u32 (*)[256])crc32table_be, CRC32_POLY_BE);

}

#endif

EXPORT_SYMBOL(crc32_be);

lib/gen_crc32table.c

+2 −2
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ static void crc32init_le_generic(const uint32_t polynomial, 


static void crc32init_le(void)

{

	crc32init_le_generic(CRCPOLY_LE, crc32table_le);

	crc32init_le_generic(CRC32_POLY_LE, crc32table_le);

}



static void crc32cinit_le(void)
@@ -77,7 +77,7 @@ static void crc32init_be(void) 
	crc32table_be[0][0] = 0;



	for (i = 1; i < BE_TABLE_SIZE; i <<= 1) {

		crc = (crc << 1) ^ ((crc & 0x80000000) ? CRCPOLY_BE : 0);

		crc = (crc << 1) ^ ((crc & 0x80000000) ? CRC32_POLY_BE : 0);

		for (j = 0; j < i; j++)

			crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];

	}