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authorEduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>2008-07-25 19:45:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:04 -0700
commitc2147a5092cfe13dbf3210e54e8a622015edeecc (patch)
treee34e0daee3cc0b19914a27d6f7f284b1fc22aa93 /include/linux/init.h
parent89081d17f7bb81d89fa1aa9b70f821c5cf4d39e9 (diff)
Better interface for hooking early initcalls
Added early initcall (pre-SMP) support, using an identical interface to that of regular initcalls. Functions called from do_pre_smp_initcalls() could be converted to use this cleaner interface. This is required by CPU hotplug, because early users have to register notifiers before going SMP. One such CPU hotplug user is the relay interface with buffer-only channels, which needs to register such a notifier, to be usable in early code. This in turn is used by kmemtrace. Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> Cc: Tom Zanussi <tzanussi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/init.h')
-rw-r--r--include/linux/init.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/init.h b/include/linux/init.h
index 42ae95411a93..11b84e106053 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -170,6 +170,13 @@ extern void (*late_time_init)(void);
__attribute__((__section__(".initcall" level ".init"))) = fn
/*
+ * Early initcalls run before initializing SMP.
+ *
+ * Only for built-in code, not modules.
+ */
+#define early_initcall(fn) __define_initcall("early",fn,early)
+
+/*
* A "pure" initcall has no dependencies on anything else, and purely
* initializes variables that couldn't be statically initialized.
*