#ifndef _NDCTL_FLETCHER_H_ | |
#define _NDCTL_FLETCHER_H_ | |
#include <ccan/endian/endian.h> | |
#include <ccan/short_types/short_types.h> | |
/* | |
* Note, fletcher64() is copied from drivers/nvdimm/label.c in the Linux kernel | |
*/ | |
static inline u64 fletcher64(void *addr, size_t len, bool le) | |
{ | |
u32 *buf = addr; | |
u32 lo32 = 0; | |
u64 hi32 = 0; | |
size_t i; | |
for (i = 0; i < len / sizeof(u32); i++) { | |
lo32 += le ? le32_to_cpu((le32) buf[i]) : buf[i]; | |
hi32 += lo32; | |
} | |
return hi32 << 32 | lo32; | |
} | |
#endif /* _NDCTL_FLETCHER_H_ */ |