smp: have smp_call_function_single() detect invalid CPUs

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Have smp_call_function_single() return invalid CPU indicies and return
-ENXIO.  This function is already executed inside a
get_cpu()..put_cpu() which locks out CPU removal, so rather than
having the higher layers doing another layer of locking to guard
against unplugged CPUs do the test here.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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H. Peter Anvin 2008-08-25 17:07:14 -07:00

parent 2a61812af2

commit f73be6dedf

1 changed files with 7 additions and 3 deletions

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kernel/smp.c

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