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(parent: 2a61812) | patch
smp: have smp_call_function_single() detect invalid CPUs
authorH. Peter Anvin <hpa@zytor.com>
Tue, 26 Aug 2008 00:07:14 +0000 (17:07 -0700)
committerH. Peter Anvin <hpa@zytor.com>
Tue, 26 Aug 2008 00:45:48 +0000 (17:45 -0700)
commitf73be6dedf4fa058ce80846dae604b08fa805ca1
treeeb38c111bedf6b356db3af20ab124dff846643cbtree | snapshot
parent2a61812af2e564cba2c8170cf96e1c823210f619commit | diff
smp: have smp_call_function_single() detect invalid CPUs

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>
kernel/smp.c diff | blob | history
Full containers within linux kernel