[RFC-PATCH] Prevent tasks from sleeping in die()

[Paul Mackerras]

David Wilder writes:

> I am seeing an issue in die() when voluntary preemption is enabled.
> die() 
> ->>show_regs()->>show_instructions()->>__get_user_nocheck()->>might_sleep()

Are you using Linus' current git tree?  It has a patch that fixes this
problem by making __get_user_nocheck do the might_sleep only if the
address you give it is a user address.

Paul.