powerpc/47x: Disable 256k page size

[ Upstream commit 910a0cb6d259736a0c86e795d4c2f42af8d0d775 ]

PPC47x_TLBE_SIZE isn't defined for 256k pages, leading to a build
break if 256k pages is selected.

So change the kconfig so that 256k pages can't be selected for 47x.

Fixes: e7f75ad01d59 ("powerpc/47x: Base ppc476 support")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Expand change log to mention build break]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2fed79b1154c872194f98bac4422c23918325e61.1611128938.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 52138ab45e5744cd6903a06d252d8fa3223ea737..fff11a5bb80560d37449e11e4e45067ebf8bf252 100644 (file)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -735,7 +735,7 @@ config PPC_64K_PAGES
 
 config PPC_256K_PAGES
        bool "256k page size"
-       depends on 44x && !STDBINUTILS
+       depends on 44x && !STDBINUTILS && !PPC_47x
        help
          Make the page size 256k.