Messages in this thread |  | | Date | Wed, 26 Sep 2001 15:01:50 +0100 | From | John Levon <> | Subject | EXPORT_SYMBOL(local_apic_enabled); |
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My module needs use of the local APIC for performance counter setup.
Currently I am detecting the various ways it can be enabled/disabled as follows :
static int __init apic_needs_setup(void) { return /* if enabled, the kernel has already set it up */ #ifdef CONFIG_X86_UP_APIC 0 && #else /* 2.4.10 and above do the necessary setup */ #if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,9) 0 && #else /* otherwise, we detect SMP hardware via the MP table */ !smp_hardware && #endif /* 2.4.10 */ #endif /* CONFIG_X86_UP_APIC */ smp_num_cpus == 1; }
this is obviously ugly, and more importantly fails when passing noapic,nosmp etc. as boot options.
How would people feel about exporting a flag for local APIC setup that modules can look at ? If it's OK I'll send a patch.
My module is not the only one that needs this (e.g. the APIC timers module)
regards john
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