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lib: crc8: pointer to data block should be const 

crc8() does not change the data passed to it, so the pointer argument
should be declared const.  This avoids callers that receive const data
having to cast it to a non-const pointer to call crc8().

Link: https://lkml.kernel.org/r/20210329122409.3291-1-rf@opensource.cirrus.com
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Fitzgerald 2021-05-06 18:03:37 -07:00 committed by Linus Torvalds
parent ade29d4fdb
commit e18baa7cc3
2 changed files with 2 additions and 2 deletions
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2
include/linux/crc8.h
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@ -96,6 +96,6 @@ void crc8_populate_msb(u8 table[CRC8_TABLE_SIZE], u8 polynomial);
* Williams, Ross N., ross<at>ross.net
* (see URL http://www.ross.net/crc/download/crc_v3.txt).
*/
u8 crc8(const u8 table[CRC8_TABLE_SIZE], u8 *pdata, size_t nbytes, u8 crc);
u8 crc8(const u8 table[CRC8_TABLE_SIZE], const u8 *pdata, size_t nbytes, u8 crc);
#endif /* __CRC8_H_ */

2
lib/crc8.c
View File

@ -71,7 +71,7 @@ EXPORT_SYMBOL(crc8_populate_lsb);
* @nbytes: number of bytes in data buffer.
* @crc: previous returned crc8 value.
*/
u8 crc8(const u8 table[CRC8_TABLE_SIZE], u8 *pdata, size_t nbytes, u8 crc)
u8 crc8(const u8 table[CRC8_TABLE_SIZE], const u8 *pdata, size_t nbytes, u8 crc)
{
/* loop over the buffer data */
while (nbytes-- > 0)