scripts/include/hash.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef HASH_H
   3 #define HASH_H
   4
   5 static inline unsigned int hash_str(const char *s)
   6 {
   7         /* fnv32 hash */
   8         unsigned int hash = 2166136261U;
   9
  10         for (; *s; s++)
  11                 hash = (hash ^ *s) * 0x01000193;
  12         return hash;
  13 }
  14
  15 /* simplified version of functions from include/linux/hash.h */
  16 #define GOLDEN_RATIO_32 0x61C88647
  17
  18 static inline unsigned int hash_32(unsigned int val)
  19 {
  20         return 0x61C88647 * val;
  21 }
  22
  23 static inline unsigned int hash_ptr(const void *ptr)
  24 {
  25         return hash_32((unsigned int)(unsigned long)ptr);
  26 }
  27
  28 #endif /* HASH_H */