Re: in_interrupt race

Russell King (rmk@arm.linux.org.uk)
Tue, 23 Apr 2002 09:31:51 +0100

On Tue, Apr 23, 2002 at 01:25:24PM +1000, Rusty Russell wrote:
> Yes: the old CPU happens to be processing an interrupt now.
> The neat solution is to follow Linus' original instinct and make
> PREEMPT an option only for UP: I only like preempt because it brings
> UP into line with SMP, effectively enlarging the SMP userbase to reasonable
> size.

> -bool 'Preemptible kernel' CONFIG_PREEMPT
> +dep_bool 'Preemptible kernel' CONFIG_PREEMPT $CONFIG_SMP
> -bool 'Preemptible Kernel' CONFIG_PREEMPT
> +dep_bool 'Preemptible Kernel' CONFIG_PREEMPT $CONFIG_SMP

Do you really mean that CONFIG_PREEMPT is only available if CONFIG_SMP is
'y' or undefined?

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html


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