powerpc: Update cpu_sibling_maps dynamically

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Rather doing one initialization pass over all the per-cpu
cpu_sibling_maps at boot, update the maps at cpu online/offline time.

This is a behavior change -- the thread_siblings attribute now
reflects only online siblings, whereas it would display offline
siblings before.  The new behavior matches that of x86, and is
arguably more useful.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Nathan Lynch 2008-07-27 15:24:52 +10:00 • committed by Benjamin Herrenschmidt

parent 9ba1984ead

commit e2075f79a9

3 changed files with 29 additions and 30 deletions

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24

arch/powerpc/kernel/setup-common.c

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3

arch/powerpc/kernel/setup_64.c

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32

arch/powerpc/kernel/smp.c

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