xxhash: replace copy_state() wrappers with macros

These simply wraps memcpy().
Replace it with macros so that it is naturally inlined.

Signed-off-by: Juhyung Park <qkrwngud825@gmail.com>
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
Change-Id: I67887a706816aff46339d43b2f28e97813c1d4af

include/linux/xxhash.h

@@ -223,7 +223,7 @@ uint64_t xxh64_digest(const struct xxh64_state *state);
  * @src: The source xxh32 state.
  * @dst: The destination xxh32 state.
  */
-void xxh32_copy_state(struct xxh32_state *dst, const struct xxh32_state *src);
+#define xxh32_copy_state(dst, src) memcpy(dst, src, sizeof(*dst))
 
 /**
  * xxh64_copy_state() - copy the source state into the destination state
@@ -231,6 +231,6 @@ void xxh32_copy_state(struct xxh32_state *dst, const struct xxh32_state *src);
  * @src: The source xxh64 state.
  * @dst: The destination xxh64 state.
  */
-void xxh64_copy_state(struct xxh64_state *dst, const struct xxh64_state *src);
+#define xxh64_copy_state(dst, src) memcpy(dst, src, sizeof(*dst))
 
 #endif /* XXHASH_H */

lib/xxhash.c

@@ -73,21 +73,6 @@ static const uint64_t PRIME64_3 =  1609587929392839161ULL;
 static const uint64_t PRIME64_4 =  9650029242287828579ULL;
 static const uint64_t PRIME64_5 =  2870177450012600261ULL;
 
-/*-**************************
- *  Utils
- ***************************/
-void xxh32_copy_state(struct xxh32_state *dst, const struct xxh32_state *src)
-{
-	memcpy(dst, src, sizeof(*dst));
-}
-EXPORT_SYMBOL(xxh32_copy_state);
-
-void xxh64_copy_state(struct xxh64_state *dst, const struct xxh64_state *src)
-{
-	memcpy(dst, src, sizeof(*dst));
-}
-EXPORT_SYMBOL(xxh64_copy_state);
-
 /*-***************************
  * Simple Hash Functions
  ****************************/