[PATCH, BACKPORT] end-of-stack detection

[Manfred Spraul]

The oops dump code detects the end of the kernel stack with
   (addr & (THREAD_SIZE-1))
This fails if the kernel stack is not 32-bit aligned. This can happen if 
an APM bios call is interrupted and then causes an oops. The result is 
an unreadable and incomplete oops dump. 2.6 contains a similar fix.

Marcelo, could you apply the patch to your tree?

--
   Manfred

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