string_utils: use restrict for lxc_safe_int64_residual()

src/lxc/string_utils.c

@@ -637,8 +637,9 @@ int lxc_safe_uint64(const char *numstr, uint64_t *converted, int base)
 	return 0;
 }
 
-int lxc_safe_int64_residual(const char *numstr, int64_t *converted, int base, char *residual,
-			    size_t residual_len)
+int lxc_safe_int64_residual(const char *restrict numstr,
+			    int64_t *restrict converted, int base,
+			    char *restrict residual, size_t residual_len)
 {
 	char *remaining = NULL;
 	int64_t u;

src/lxc/string_utils.h

@@ -64,8 +64,10 @@ __hidden extern int lxc_safe_long(const char *numstr, long int *converted);
 __hidden extern int lxc_safe_long_long(const char *numstr, long long int *converted);
 __hidden extern int lxc_safe_ulong(const char *numstr, unsigned long *converted);
 __hidden extern int lxc_safe_uint64(const char *numstr, uint64_t *converted, int base);
-__hidden extern int lxc_safe_int64_residual(const char *numstr, int64_t *converted, int base,
-					    char *residual, size_t residual_len);
+__hidden extern int lxc_safe_int64_residual(const char *restrict numstr,
+					    int64_t *restrict converted,
+					    int base, char *restrict residual,
+					    size_t residual_len);
 /* Handles B, kb, MB, GB. Detects overflows and reports -ERANGE. */
 __hidden extern int parse_byte_size_string(const char *s, long long int *converted);