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| author | Ming Lei <tom.leiming@gmail.com> | 2011-11-17 13:34:31 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-12-06 08:16:53 +0100 |
| commit | 73839c5b2eacc15cb0aa79c69b285fc659fa8851 (patch) | |
| tree | 460e38f3b8036b33a3bed5e4322ea1bb5ef4e3c8 /init | |
| parent | d3d03d4fc5b1bec3a579112de170a9676e9d97cb (diff) | |
| download | lwn-73839c5b2eacc15cb0aa79c69b285fc659fa8851.tar.gz lwn-73839c5b2eacc15cb0aa79c69b285fc659fa8851.zip | |
init/main.c: Execute lockdep_init() as early as possible
This patch fixes a lockdep warning on ARM platforms:
[ 0.000000] WARNING: lockdep init error! Arch code didn't call lockdep_init() early enough?
[ 0.000000] Call stack leading to lockdep invocation was:
[ 0.000000] [<c00164bc>] save_stack_trace_tsk+0x0/0x90
[ 0.000000] [<ffffffff>] 0xffffffff
The warning is caused by printk inside smp_setup_processor_id().
It is safe to do this because lockdep_init() doesn't depend on
smp_setup_processor_id(), so improve things that printk can be
called as early as possible without lockdep complaint.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1321508072-23853-1-git-send-email-tom.leiming@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/init/main.c b/init/main.c index 217ed23e9487..2c76efb513c2 100644 --- a/init/main.c +++ b/init/main.c @@ -469,13 +469,12 @@ asmlinkage void __init start_kernel(void) char * command_line; extern const struct kernel_param __start___param[], __stop___param[]; - smp_setup_processor_id(); - /* * Need to run as early as possible, to initialize the * lockdep hash: */ lockdep_init(); + smp_setup_processor_id(); debug_objects_early_init(); /* |