[RFC 4/4] powerpc: Kconfig: Enable THP_SWAP on Book3S64

[Ritesh Harjani (IBM)]

This enables THP_SWAP support for Book3S64.

The performance testing of this patch series on Book3S64 with zram has shown
around 40-50% improvement in case of Radix. We will be doing some performance
testing on Hash too and will soon update the results.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx>
---
 arch/powerpc/platforms/Kconfig.cputype | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index bac02c83bb3e..48f74bd22343 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -113,6 +113,7 @@ config PPC_THP
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE
        select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
        select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
+       select ARCH_WANTS_THP_SWAP	if TRANSPARENT_HUGEPAGE

 choice
 	prompt "CPU selection"
--
2.39.5