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authorKonstantin Belousov <kib@FreeBSD.org>2010-10-12 09:18:17 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2010-10-12 09:18:17 +0000
commit78ae4338a24933c8a64094600625385b46688891 (patch)
tree49b23685ac60a1e49a5edfa5657f8d82d84b941d /sys/sys/module.h
parent96f231fde99166a377ca359e1cd52e386137dd2c (diff)
downloadsrc-78ae4338a24933c8a64094600625385b46688891.tar.gz
src-78ae4338a24933c8a64094600625385b46688891.zip
Add macro DECLARE_MODULE_TIED to denote a module as requiring the
kernel of exactly the same __FreeBSD_version as the headers module was compiled against. Mark our in-tree ABI emulators with DECLARE_MODULE_TIED. The modules use kernel interfaces that the Release Engineering Team feel are not stable enough to guarantee they will not change during the life cycle of a STABLE branch. In particular, the layout of struct sysentvec is declared to be not part of the STABLE KBI. Discussed with: bz, rwatson Approved by: re (bz, kensmith) MFC after: 2 weeks
Notes
Notes: svn path=/head/; revision=213716
Diffstat (limited to 'sys/sys/module.h')
-rw-r--r--sys/sys/module.h17
1 files changed, 15 insertions, 2 deletions
diff --git a/sys/sys/module.h b/sys/sys/module.h
index 2abad63f9ecb..782770a73df9 100644
--- a/sys/sys/module.h
+++ b/sys/sys/module.h
@@ -125,13 +125,26 @@ struct mod_metadata {
*/
#define MODULE_KERNEL_MAXVER (roundup(__FreeBSD_version, 100000) - 1)
-#define DECLARE_MODULE(name, data, sub, order) \
+#define DECLARE_MODULE_WITH_MAXVER(name, data, sub, order, maxver) \
MODULE_DEPEND(name, kernel, __FreeBSD_version, \
- __FreeBSD_version, MODULE_KERNEL_MAXVER); \
+ __FreeBSD_version, maxver); \
MODULE_METADATA(_md_##name, MDT_MODULE, &data, #name); \
SYSINIT(name##module, sub, order, module_register_init, &data); \
struct __hack
+#define DECLARE_MODULE(name, data, sub, order) \
+ DECLARE_MODULE_WITH_MAXVER(name, data, sub, order, MODULE_KERNEL_MAXVER)
+
+/*
+ * The module declared with DECLARE_MODULE_TIED can only be loaded
+ * into the kernel with exactly the same __FreeBSD_version.
+ *
+ * Use it for modules that use kernel interfaces that are not stable
+ * even on STABLE/X branches.
+ */
+#define DECLARE_MODULE_TIED(name, data, sub, order) \
+ DECLARE_MODULE_WITH_MAXVER(name, data, sub, order, __FreeBSD_version)
+
#define MODULE_VERSION(module, version) \
static struct mod_version _##module##_version = { \
version \