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authorTony Lindgren <tony@atomide.com>2014-05-13 09:05:26 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-27 14:26:31 -0700
commit451ef1caa8698511bb7766344ccec9f08d5d294b (patch)
treefe0155af94652bd81d89fc54710363467c8c54e4 /include/linux/init.h
parenta996d010b648788b615938f6a26be6cf08d96aaf (diff)
init.h: Update initcall_sync variants to fix build errors
We are getting randconfig build errors on device drivers with tristate Kconfig option if they are using custom initcall levels. Rather than add ifdeffery into the drivers, let's add the missing initcall_sync variants. As the comment in init.h has kept people from updating the list of initcalls that can be just module_init when the driver is loaded as a loadable module, let's also update the comment a bit to describe valid use cases custom initcall levels. While most drivers should nowadays use just regular module_init because of the deferred probe, we do have quite a few custom initcall levels left that we cannot remove until tested properly. There are also still few valid cases where a custom initcall level might make sense that I'm aware of. For example a bus snooping driver can provide information about invalid bus access and is handy loader early when built in. But there's no hard dependency to have it necessarily built in and a loadable module is a valid option. Another example is a driver implementing a Linux framework like pinctrl framework. That driver may be needed early on some platforms because of legacy reasons, while it can be just a regular module_init on most platforms. Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/init.h')
-rw-r--r--include/linux/init.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/include/linux/init.h b/include/linux/init.h
index a3ba27076342..2df8e8dd10a4 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -297,16 +297,28 @@ void __init parse_early_options(char *cmdline);
#else /* MODULE */
-/* Don't use these in loadable modules, but some people do... */
+/*
+ * In most cases loadable modules do not need custom
+ * initcall levels. There are still some valid cases where
+ * a driver may be needed early if built in, and does not
+ * matter when built as a loadable module. Like bus
+ * snooping debug drivers.
+ */
#define early_initcall(fn) module_init(fn)
#define core_initcall(fn) module_init(fn)
+#define core_initcall_sync(fn) module_init(fn)
#define postcore_initcall(fn) module_init(fn)
+#define postcore_initcall_sync(fn) module_init(fn)
#define arch_initcall(fn) module_init(fn)
#define subsys_initcall(fn) module_init(fn)
+#define subsys_initcall_sync(fn) module_init(fn)
#define fs_initcall(fn) module_init(fn)
+#define fs_initcall_sync(fn) module_init(fn)
#define rootfs_initcall(fn) module_init(fn)
#define device_initcall(fn) module_init(fn)
+#define device_initcall_sync(fn) module_init(fn)
#define late_initcall(fn) module_init(fn)
+#define late_initcall_sync(fn) module_init(fn)
#define console_initcall(fn) module_init(fn)
#define security_initcall(fn) module_init(fn)