linux-kernel - [PATCH] powerpc: Kconfig: remove BE-only platforms from LE kernel build

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Message-Id: <1441583880-17824-1-git-send-email-boqun.feng@gmail.com>
Date:	Mon,  7 Sep 2015 07:58:00 +0800
From:	Boqun Feng <boqun.feng@...il.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Olof Johansson <olof@...om.net>,
	Geoff Levand <geoff@...radead.org>,
	Boqun Feng <boqun.feng@...il.com>
Subject: [PATCH] powerpc: Kconfig: remove BE-only platforms from LE kernel build

Currently, little endian is only supported on powernv and pseries,
however, Kconfigs still allow us to include other platforms in a LE
kernel, this may result in space wasting or even build error if some
BE-only platforms always assume they are built for a BE kernel. So just
modify the Kconfigs of BE-only platforms to remove them from being built
for a LE kernel.

For 32bit only platforms, nothing needs to be done, because
CPU_LITTLE_ENDIAN depends on PPC64. For 64bit supported platforms, add
CPU_BIG_ENDIAN to dependencies explicitly, so that these platforms will
be disabled for LE [Suggested-by: Cédric Le Goater <clg@...ibm.com>].

Signed-off-by: Boqun Feng <boqun.feng@...il.com>
---
 arch/powerpc/platforms/cell/Kconfig     | 4 ++--
 arch/powerpc/platforms/maple/Kconfig    | 2 +-
 arch/powerpc/platforms/pasemi/Kconfig   | 2 +-
 arch/powerpc/platforms/powermac/Kconfig | 2 +-
 arch/powerpc/platforms/ps3/Kconfig      | 2 +-
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/platforms/cell/Kconfig b/arch/powerpc/platforms/cell/Kconfig
index 2f23133..808a904 100644
--- a/arch/powerpc/platforms/cell/Kconfig
+++ b/arch/powerpc/platforms/cell/Kconfig
@@ -25,7 +25,7 @@ config PPC_CELL_NATIVE
 
 config PPC_IBM_CELL_BLADE
 	bool "IBM Cell Blade"
-	depends on PPC64 && PPC_BOOK3S
+	depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN
 	select PPC_CELL_NATIVE
 	select PPC_OF_PLATFORM_PCI
 	select PCI
@@ -35,7 +35,7 @@ config PPC_IBM_CELL_BLADE
 
 config PPC_CELL_QPACE
 	bool "IBM Cell - QPACE"
-	depends on PPC64 && PPC_BOOK3S
+	depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN
 	select PPC_CELL_COMMON
 
 config AXON_MSI
diff --git a/arch/powerpc/platforms/maple/Kconfig b/arch/powerpc/platforms/maple/Kconfig
index 1ea621a..e359d0d 100644
--- a/arch/powerpc/platforms/maple/Kconfig
+++ b/arch/powerpc/platforms/maple/Kconfig
@@ -1,5 +1,5 @@
 config PPC_MAPLE
-	depends on PPC64 && PPC_BOOK3S
+	depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN
 	bool "Maple 970FX Evaluation Board"
 	select PCI
 	select MPIC
diff --git a/arch/powerpc/platforms/pasemi/Kconfig b/arch/powerpc/platforms/pasemi/Kconfig
index a2aeb32..00d4b28 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -1,5 +1,5 @@
 config PPC_PASEMI
-	depends on PPC64 && PPC_BOOK3S
+	depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN
 	bool "PA Semi SoC-based platforms"
 	default n
 	select MPIC
diff --git a/arch/powerpc/platforms/powermac/Kconfig b/arch/powerpc/platforms/powermac/Kconfig
index 607124b..43c6062 100644
--- a/arch/powerpc/platforms/powermac/Kconfig
+++ b/arch/powerpc/platforms/powermac/Kconfig
@@ -1,6 +1,6 @@
 config PPC_PMAC
 	bool "Apple PowerMac based machines"
-	depends on PPC_BOOK3S
+	depends on PPC_BOOK3S && CPU_BIG_ENDIAN
 	select MPIC
 	select PCI
 	select PPC_INDIRECT_PCI if PPC32
diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index 56f2740..b27f40f 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -1,6 +1,6 @@
 config PPC_PS3
 	bool "Sony PS3"
-	depends on PPC64 && PPC_BOOK3S
+	depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN
 	select PPC_CELL
 	select USB_OHCI_LITTLE_ENDIAN
 	select USB_OHCI_BIG_ENDIAN_MMIO
-- 
2.5.1

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