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

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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: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Krzysztof Kozlowski 2018-07-17 18:05:37 +02:00 committed by Herbert Xu
parent 1fb2e3f276
commit e37f2f93af
3 changed files with 9 additions and 9 deletions
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4
include/linux/crc32poly.h
View file

@ -7,8 +7,8 @@
* *the* standard CRC-32 polynomial, first popularized by Ethernet. * *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 * 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 CRC32_POLY_LE 0xedb88320
#define CRCPOLY_BE 0x04c11db7 #define CRC32_POLY_BE 0x04c11db7
/* /*
* This is the CRC32c polynomial, as outlined by Castagnoli. * This is the CRC32c polynomial, as outlined by Castagnoli.

10
lib/crc32.c
View file

@ -185,7 +185,7 @@ static inline u32 __pure crc32_le_generic(u32 crc, unsigned char const *p,
#if CRC_LE_BITS == 1 #if CRC_LE_BITS == 1
u32 __pure crc32_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, 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) 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) u32 __pure crc32_le(u32 crc, unsigned char const *p, size_t len)
{ {
return crc32_le_generic(crc, p, 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) 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) 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) 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 #if CRC_LE_BITS == 1
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) 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 #else
u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len) u32 __pure crc32_be(u32 crc, unsigned char const *p, size_t len)
{ {
return crc32_be_generic(crc, p, len, return crc32_be_generic(crc, p, len,
(const u32 (*)[256])crc32table_be, CRCPOLY_BE); (const u32 (*)[256])crc32table_be, CRC32_POLY_BE);
} }
#endif #endif
EXPORT_SYMBOL(crc32_be); EXPORT_SYMBOL(crc32_be);

4
lib/gen_crc32table.c
View file

@ -58,7 +58,7 @@ static void crc32init_le_generic(const uint32_t polynomial,
static void crc32init_le(void) 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) static void crc32cinit_le(void)
@ -77,7 +77,7 @@ static void crc32init_be(void)
crc32table_be[0][0] = 0; crc32table_be[0][0] = 0;
for (i = 1; i < BE_TABLE_SIZE; i <<= 1) { 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++) for (j = 0; j < i; j++)
crc32table_be[0][i + j] = crc ^ crc32table_be[0][j]; crc32table_be[0][i + j] = crc ^ crc32table_be[0][j];
} }