Re: [PATCH] Alternative fix for kprobes&DEBUG_RODATA was Re: [1/2]2.6.22-rc5: known regressions with patches

[Linus Torvalds]

On Thu, 21 Jun 2007, Andi Kleen wrote:

> Ok, here's a patch to do this. With that 55181000cd60334fe920c65ffbcdfe0e3f1de406
> should be reverted because it isn't needed anymore.

This seems buggy:

> +	int notext = 0;
>  
> +#ifdef CONFIG_KPROBES
> +	notext = 1;
> +#endif
>  #ifdef CONFIG_HOTPLUG_CPU
>  	/* It must still be possible to apply SMP alternatives. */
> -	if (num_possible_cpus() <= 1)
> +	notext = (num_possible_cpus() > 1);
>  #endif

The CONFIG_HOTPLUG_CPU case will overwrite the CONFIG_KPROBES, and turn it 
back to zero for a single CPU.

		Linus
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