On 07/09/2013 12:44 AM, Paul Gortmaker wrote:

On 13-07-08 06:26 PM, Uwe Kleine-König wrote:

quoted

and so depending on LIST_BL_LOCKMASK being one. But LIST_BL_LOCKMASK is
only one if at least on of CONFIG_SMP and CONFIG_DEBUG_SPINLOCK are
defined. Without these the value returned by hlist_bl_first has the
zeroth bit set which likely results in a crash.

The incorrect assumption that I made was that the bit spin locks
still set/cleared the bit in the !SMP case.  So if we set the bit
and the mask is zero, we get the mismatch, giving something like:

Acked-by: Paul Gortmaker <redacted>
Tested-by: Paul Gortmaker <redacted>

Thanks everyone.

Thanks,
Paul.

Sebastian
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