diff options
| author | Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro> | 2008-07-25 19:45:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:04 -0700 |
| commit | c2147a5092cfe13dbf3210e54e8a622015edeecc (patch) | |
| tree | e34e0daee3cc0b19914a27d6f7f284b1fc22aa93 /include | |
| parent | 89081d17f7bb81d89fa1aa9b70f821c5cf4d39e9 (diff) | |
| download | op-kernel-dev-c2147a5092cfe13dbf3210e54e8a622015edeecc.zip op-kernel-dev-c2147a5092cfe13dbf3210e54e8a622015edeecc.tar.gz | |
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')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 2 | ||||
| -rw-r--r-- | include/linux/init.h | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 729f6b0..9cd44b1 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -359,6 +359,8 @@ } #define INITCALLS \ + *(.initcallearly.init) \ + __early_initcall_end = .; \ *(.initcall0.init) \ *(.initcall0s.init) \ *(.initcall1.init) \ diff --git a/include/linux/init.h b/include/linux/init.h index 42ae954..11b84e1 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. * |
