util: move some raw memory functions from string-util.h → memory-util.h

src/basic/string-util.c

@@ -10,14 +10,15 @@
 
 #include "alloc-util.h"
 #include "escape.h"
+#include "fileio.h"
 #include "gunicode.h"
 #include "locale-util.h"
 #include "macro.h"
+#include "memory-util.h"
 #include "string-util.h"
 #include "terminal-util.h"
 #include "utf8.h"
 #include "util.h"
-#include "fileio.h"
 
 int strcmp_ptr(const char *a, const char *b) {
 
@@ -1048,25 +1049,6 @@ int free_and_strndup(char **p, const char *s, size_t l) {
         return 1;
 }
 
-#if !HAVE_EXPLICIT_BZERO
-/*
- * Pointer to memset is volatile so that compiler must de-reference
- * the pointer and can't assume that it points to any function in
- * particular (such as memset, which it then might further "optimize")
- * This approach is inspired by openssl's crypto/mem_clr.c.
- */
-typedef void *(*memset_t)(void *,int,size_t);
-
-static volatile memset_t memset_func = memset;
-
-void* explicit_bzero_safe(void *p, size_t l) {
-        if (l > 0)
-                memset_func(p, '\0', l);
-
-        return p;
-}
-#endif
-
 char* string_erase(char *x) {
         if (!x)
                 return NULL;