error_utils: move error helper to separate header

src/lxc/Makefile.am

@@ -18,6 +18,7 @@ noinst_HEADERS = api_extensions.h \
 		 confile_utils.h \
 		 criu.h \
 		 error.h \
+		 error_utils.h \
 		 file_utils.h \
 		 ../include/netns_ifaddrs.h \
 		 initutils.h \
@@ -117,6 +118,7 @@ liblxc_la_SOURCES = af_unix.c af_unix.h \
 		    criu.c criu.h \
 		    error.c error.h \
 		    execute.c \
+		    error_utils.h \
 		    freezer.c \
 		    file_utils.c file_utils.h \
 		    ../include/netns_ifaddrs.c ../include/netns_ifaddrs.h \

src/lxc/cgroups/cgfsng.c

@@ -40,6 +40,7 @@
 #include "commands_utils.h"
 #include "conf.h"
 #include "config.h"
+#include "error_utils.h"
 #include "log.h"
 #include "macro.h"
 #include "mainloop.h"

src/lxc/error_utils.h

+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#ifndef __LXC_ERROR_UTILS_H
+#define __LXC_ERROR_UTILS_H
+
+#define MAX_ERRNO 4095
+
+#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
+
+static inline void *ERR_PTR(long error)
+{
+	return (void *)error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+	return (long)ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+	return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+static inline long IS_ERR_OR_NULL(const void *ptr)
+{
+	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
+}
+
+static inline void *ERR_CAST(const void *ptr)
+{
+	return (void *)ptr;
+}
+
+static inline int PTR_RET(const void *ptr)
+{
+	if (IS_ERR(ptr))
+		return PTR_ERR(ptr);
+	else
+		return 0;
+}
+
+#endif /* __LXC_ERROR_UTILS_H */

src/lxc/macro.h

@@ -672,43 +672,6 @@ enum {
 		(b) = __tmp;           \
 	} while (0)
 
-#define MAX_ERRNO 4095
-
-#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
-
-static inline void *ERR_PTR(long error)
-{
-	return (void *)error;
-}
-
-static inline long PTR_ERR(const void *ptr)
-{
-	return (long)ptr;
-}
-
-static inline long IS_ERR(const void *ptr)
-{
-	return IS_ERR_VALUE((unsigned long)ptr);
-}
-
-static inline long IS_ERR_OR_NULL(const void *ptr)
-{
-	return !ptr || IS_ERR_VALUE((unsigned long)ptr);
-}
-
-static inline void *ERR_CAST(const void *ptr)
-{
-	return (void *)ptr;
-}
-
-static inline int PTR_RET(const void *ptr)
-{
-	if (IS_ERR(ptr))
-		return PTR_ERR(ptr);
-	else
-		return 0;
-}
-
 #define min(x, y)                              \
 	({                                     \
 		typeof(x) _min1 = (x);         \

src/lxc/memory_utils.h

@@ -11,6 +11,7 @@
 #include <unistd.h>
 
 #include "macro.h"
+#include "error_utils.h"
 
 #define define_cleanup_function(type, cleaner)           \
 	static inline void cleaner##_function(type *ptr) \