[POWERPC] Make emergency stack safe for current_thread_info() use

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The current_thread_info() macro, used by preempt_count(), assumes the
base address and size of the stack are THREAD_SIZE aligned.

The emergency stack currently isn't either of these things, which
could potentially cause problems anytime we're running on the
emergency stack.  That includes when we detect a bad kernel stack
pointer, and also during early_setup_secondary().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Michael Ellerman 2008-04-30 13:21:45 +10:00 • committed by Paul Mackerras

parent 595f403c1a

commit 3243d87441

1 changed files with 6 additions and 3 deletions

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arch/powerpc/kernel/setup_64.c

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