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powerpc: Make sparsemem the default on 64-bit Book3S 

Make sparsemem the default on all 64-bit Book3S platforms. It already is
for pseries and ps3, and we need to enable it for powernv because on
POWER9 memory between chips is discontiguous.

For the other platforms sparsemem should work fine, though it might add
a small amount of overhead. We can always force FLATMEM in the
defconfigs if necessary.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2017-04-05 16:10:48 +10:00
parent 4868e3508d
commit 7b3912f422
1 changed files with 1 additions and 1 deletions
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arch/powerpc/Kconfig
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@ -586,7 +586,7 @@ config ARCH_SPARSEMEM_ENABLE
config ARCH_SPARSEMEM_DEFAULT
def_bool y
depends on (SMP && PPC_PSERIES) || PPC_PS3
depends on PPC_BOOK3S_64
config SYS_SUPPORTS_HUGETLBFS
bool