9 files changed, 33 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index d79a902d155..3b100518539 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -2,6 +2,23 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
+config PPC_DISABLE_WERROR
+        bool "Don't build arch/powerpc code with -Werror"
+        default n
+        help
+          This option tells the compiler NOT to build the code under
+          arch/powerpc with the -Werror flag (which means warnings
+          are treated as errors).
+
+          Only enable this if you are hitting a build failure in the
+          arch/powerpc code caused by a warning, and you don't feel
+          inclined to fix it.
+
+config PPC_WERROR
+        bool
+        depends on !PPC_DISABLE_WERROR
+        default y
+
 config PRINT_STACK_DEPTH
         int "Stack depth to print" if DEBUG_KERNEL
         default 64
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 612b0c4dc26..6a4fb29a061 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -4,6 +4,8 @@
 
 CFLAGS_ptrace.o         += -DUTS_MACHINE='"$(UTS_MACHINE)"'
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifeq ($(CONFIG_PPC64),y)
 CFLAGS_prom_init.o      += -mno-minimal-toc
 endif
diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile
index 4b2df66c79d..459c7ee580f 100644
--- a/arch/powerpc/kvm/Makefile
+++ b/arch/powerpc/kvm/Makefile
@@ -2,6 +2,8 @@
 # Makefile for Kernel-based Virtual Machine module
 #
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 EXTRA_CFLAGS += -Ivirt/kvm -Iarch/powerpc/kvm
 
 common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 29b742b90f1..3040dac18a3 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -2,6 +2,8 @@
 # Makefile for ppc-specific library files..
 #
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS            += -mno-minimal-toc
 endif
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index c4bcf072cb3..2d2192e48de 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -2,6 +2,8 @@
 # Makefile for the linux ppc-specific parts of the memory manager.
 #
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS    += -mno-minimal-toc
 endif
diff --git a/arch/powerpc/oprofile/Makefile b/arch/powerpc/oprofile/Makefile
index 2ef6b0dddd8..73e1c2ca055 100644
--- a/arch/powerpc/oprofile/Makefile
+++ b/arch/powerpc/oprofile/Makefile
@@ -1,3 +1,5 @@
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS    += -mno-minimal-toc
 endif
diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index f7419198e63..a6812ee0010 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -1,4 +1,6 @@
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 obj-$(CONFIG_FSL_ULI1575)       += fsl_uli1575.o
 
 obj-$(CONFIG_PPC_PMAC)          += powermac/
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 2d1c87dd5d1..d073bfdd222 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -1,3 +1,5 @@
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifeq ($(CONFIG_PPC64),y)
 EXTRA_CFLAGS                    += -mno-minimal-toc
 endif
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 9cb03b71b9d..85ab97ab840 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile
@@ -1,5 +1,7 @@
 # Makefile for xmon
 
+subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
+
 ifdef CONFIG_PPC64
 EXTRA_CFLAGS += -mno-minimal-toc
 endif