Messages in this thread Patch in this message |  | | Date | Thu, 16 Nov 2006 21:15:32 +0100 | From | Ingo Molnar <> | Subject | [patch] cpufreq: mark cpufreq_tsc() as core_initcall_sync |
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* Thomas Gleixner <tglx@timesys.com> wrote:
> [PATCH] cpufreq: make the transition_notifier chain use SRCU > (b4dfdbb3c707474a2254c5b4d7e62be31a4b7da9) > > breaks cpu frequency notification users, which register the callback > on core_init level. Interestingly enough the registration survives the > uninitialized head, but the registered user is lost by:
i have hit this bug in -rt (it caused a lockup) and have fixed it - forgot to send it upstream. Find the patch below.
Ingo
----------------> From: Ingo Molnar <mingo@elte.hu> Subject: [patch] cpufreq: mark cpufreq_tsc() as core_initcall_sync
init_cpufreq_transition_notifier_list() should execute first, which is a core_initcall, so mark cpufreq_tsc() core_initcall_sync.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
--- linux.orig/arch/x86_64/kernel/tsc.c +++ linux/arch/x86_64/kernel/tsc.c @@ -138,7 +138,11 @@ static int __init cpufreq_tsc(void) return 0; } -core_initcall(cpufreq_tsc); +/* + * init_cpufreq_transition_notifier_list() should execute first, + * which is a core_initcall, so mark this one core_initcall_sync: + */ +core_initcall_sync(cpufreq_tsc); #endif /* - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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