Boot hang on Origen with (!SMP && CPU_IDLE)

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Hi,

We are getting boot-time system hang on Exynos4210-based Origen board
if the kernel (right now testing v3.13-rc6) is built using
exynos_defconfig, disabling SMP support and enabling CPU_IDLE support.
The boot log can be found here[1].

Git bisect points to following commit.

commit 87107d89052bcec1fe91b309631de4ed294a5171
Author: Arnd Bergmann <arnd@xxxxxxxx>
Date:   Wed Jun 19 01:36:52 2013 +0900

    ARM: EXYNOS: Remove legacy L2X0 initialization

    Since Exynos is now supporting only DT-based boot, the old L2X0
    initialization code is not needed anymore, so exynos4_l2x0_cache_init()
    can be greatly simplified.

    Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
    Signed-off-by: Tomasz Figa <t.figa@xxxxxxxxxxx>
    Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
    Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>

Reverting the changes, the kernel boots up.

Any idea what else we might be missing?

[1] http://pastebin.com/0mP6ML4y
-- 
Tushar Behera
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