powerpc: Reset kernel stack on cpu online from cede state

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Cpu hotplug (offline) without dlpar operation will place cpu
in cede state and the extended_cede_processor() function will
return when resumed.

Kernel stack pointer needs to be reset before
start_secondary() is called to continue the online operation.

Added new function start_secondary_resume() to do the above
steps.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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This commit is contained in:

Vaidyanathan Srinivasan 2010-03-01 02:58:09 +00:00 • committed by Benjamin Herrenschmidt

parent de0b632ba0

commit 8dbce53cc2

3 changed files with 16 additions and 5 deletions

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11

arch/powerpc/kernel/head_64.S

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9

arch/powerpc/platforms/pseries/hotplug-cpu.c

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1

arch/powerpc/platforms/pseries/offline_states.h

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