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powerpc: Make NUMA depend on SMP

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Our Kconfig allows NUMA to be enabled without SMP, but none of
our defconfigs use that combination. This means it can easily be
broken inadvertently by code changes, which has happened recently.

Although it's theoretically possible to have a machine with a single
CPU and multiple memory nodes, I can't think of any real systems where
that's the case. Even so if such a system exists, it can just run an
SMP kernel anyway.

So to avoid the need to add extra #ifdefs and/or build breaks, make
NUMA depend on SMP.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20201124120547.1940635-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2020-11-24 23:05:45 +11:00
parent 894fa235eb
commit 25395cd2f8
1 changed files with 1 additions and 1 deletions
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arch/powerpc/Kconfig
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@ -660,7 +660,7 @@ config IRQ_ALL_CPUS
config NUMA
bool "NUMA support"
depends on PPC64
depends on PPC64 && SMP
default y if SMP && PPC_PSERIES
config NODES_SHIFT