Re: PREEMPT_ACTIVE too low error with all asm-generic headers forsome arches

[Ingo Molnar]

* Mike Frysinger <vapier.adi@xxxxxxxxx> wrote:

> after pulling the latest mainline code, Blackfin started hitting a
> build failure like so:
>   CC      arch/blackfin/kernel/asm-offsets.s
> In file included from include/linux/interrupt.h:12,
>                  from include/linux/kernel_stat.h:8,
>                  from arch/blackfin/kernel/asm-offsets.c:32:
> include/linux/hardirq.h:66:2: error: #error PREEMPT_ACTIVE is too low!
> make[1]: *** [arch/blackfin/kernel/asm-offsets.s] Error 1
> 
> this is because we've converted to asm-generic for most of our headers
> (including hardirq.h).  originally we were defining HARDIRQ_BITS
> ourselves to 8, but then we dropped that in favor of the
> asm-generic/hardirq.h which setup a default of 8.  but then they
> dropped it in favor of the linux/hardirq.h default handling ... but it
> sets it to MAX_HARDIRQ_BITS by default which is 10.  which pushes
> Blackfin over the edge and into this build error.

hm, you wrote this mail to me but i havent touched asm-generic nor 
blackfin in this cycle. The breakage appears to have been caused by 
or at around this commit: