Adjust Makefiles

Makefile

@@ -354,7 +354,7 @@ CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 CFLAGS_MODULE   =
 AFLAGS_MODULE   =
 LDFLAGS_MODULE  =
-CFLAGS_KERNEL	=
+CFLAGS_KERNEL	= -mtune=cortex-a15 -mfpu=neon-vfpv4
 AFLAGS_KERNEL	=
 CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
 
@@ -567,7 +567,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
 else
-KBUILD_CFLAGS	+= -O2
+KBUILD_CFLAGS	+= -O2 $(call cc-disable-warning,maybe-uninitialized,)
 endif
 
 include $(srctree)/arch/$(SRCARCH)/Makefile
@@ -585,18 +585,18 @@ endif
 # Use make W=1 to enable this warning (see scripts/Makefile.build)
 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 
-ifdef CONFIG_FRAME_POINTER
-KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
-else
+#ifdef CONFIG_FRAME_POINTER
+#KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
+#else
 # Some targets (ARM with Thumb2, for example), can't be built with frame
 # pointers.  For those, we don't have FUNCTION_TRACER automatically
 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
 # -fomit-frame-pointer with FUNCTION_TRACER.
-ifndef CONFIG_FUNCTION_TRACER
+#ifndef CONFIG_FUNCTION_TRACER
 KBUILD_CFLAGS	+= -fomit-frame-pointer
-endif
-endif
+#endif
+#endif
 
 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 

arch/arm/Kconfig

@@ -11,14 +11,14 @@ config ARM
 	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
 	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
 	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
-	select HAVE_ARCH_KGDB
+	#select HAVE_ARCH_KGDB
 	select HAVE_KPROBES if !XIP_KERNEL
 	select HAVE_KRETPROBES if (HAVE_KPROBES)
-	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
+	#select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
 	select HAVE_ARCH_MMAP_RND_BITS if MMU
-	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
-	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
-	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
+	#select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
+	#select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
+	#select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
 	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_KERNEL_GZIP

arch/arm/Kconfig.debug

@@ -44,7 +44,7 @@ config ARM_UNWIND
 config OLD_MCOUNT
 	bool
 	depends on FUNCTION_TRACER && FRAME_POINTER
-	default y
+	default n
 
 config DEBUG_USER
 	bool "Verbose user fault messages"

arch/arm/Makefile

@@ -17,7 +17,7 @@ endif
 
 OBJCOPYFLAGS	:=-O binary -R .comment -S
 GZFLAGS		:=-9
-#KBUILD_CFLAGS	+=-pipe
+KBUILD_CFLAGS	+=-pipe
 # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
 KBUILD_CFLAGS	+=$(call cc-option,-marm,)
 
@@ -33,10 +33,6 @@ ifeq ($(CONFIG_MMU),)
 MMUEXT		:= -nommu
 endif
 
-ifeq ($(CONFIG_FRAME_POINTER),y)
-KBUILD_CFLAGS	+=-fno-omit-frame-pointer -mapcs -mno-sched-prolog
-endif
-
 ifeq ($(CONFIG_CC_STACKPROTECTOR),y)
 KBUILD_CFLAGS	+=-fstack-protector
 endif
@@ -65,7 +61,7 @@ KBUILD_CFLAGS	+= $(call cc-option,-fno-ipa-sra)
 # Note that GCC does not numerically define an architecture version
 # macro, but instead defines a whole series of macros which makes
 # testing for a specific architecture or later rather impossible.
-arch-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-march=armv7-a,-march=armv5t -Wa$(comma)-march=armv7-a)
+arch-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7 $(call cc-option,-mcpu=cortex-a15,-march=armv7-a)
 arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 $(call cc-option,-march=armv6,-march=armv5t -Wa$(comma)-march=armv6)
 # Only override the compiler option if ARMv6. The ARMv6K extensions are
 # always available in ARMv7

arch/arm/vfp/Makefile

@@ -7,7 +7,7 @@
 # ccflags-y := -DDEBUG
 # asflags-y := -DDEBUG
 
-KBUILD_AFLAGS	:=$(KBUILD_AFLAGS:-msoft-float=-Wa,-mfpu=softvfp+vfp -mfloat-abi=soft)
+KBUILD_AFLAGS	:=$(KBUILD_AFLAGS:-msoft-float=-Wa,-mfpu=neon-vfpv4 -mfloat-abi=hard)
 LDFLAGS		+=--no-warn-mismatch
 
 obj-y			+= vfp.o

drivers/staging/android/Kconfig

@@ -62,6 +62,7 @@ config PERSISTENT_TRACER
 	depends on HAVE_FUNCTION_TRACER
 	select FUNCTION_TRACER
 	select ANDROID_PERSISTENT_RAM
+	default n
 	help
 	  persistent_trace traces function calls into a persistent ram
 	  buffer that can be decoded and dumped after reboot through

kernel/sched/Makefile

@@ -2,15 +2,6 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_clock.o = -pg
 endif
 
-ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
-# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
-# needed for x86 only.  Why this used to be enabled for all architectures is beyond
-# me.  I suspect most platforms don't need this, but until we know that for sure
-# I turn this off for IA-64 only.  Andreas Schwab says it's also needed on m68k
-# to get a correct value for the wait-channel (WCHAN in ps). --davidm
-CFLAGS_core.o := $(PROFILING) -fno-omit-frame-pointer
-endif
-
 obj-y += core.o clock.o idle_task.o fair.o rt.o stop_task.o sched_avg.o
 obj-$(CONFIG_SMP) += cpupri.o
 obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o

kernel/trace/Kconfig

@@ -148,6 +148,7 @@ config FUNCTION_TRACER
 	select KALLSYMS
 	select GENERIC_TRACER
 	select CONTEXT_SWITCH_TRACER
+	default n
 	help
 	  Enable the kernel to trace every kernel function. This is done
 	  by using a compiler feature to insert a small, 5-byte No-Operation
@@ -328,6 +329,7 @@ config STACK_TRACER
 	select FUNCTION_TRACER
 	select STACKTRACE
 	select KALLSYMS
+	default n
 	help
 	  This special tracer records the maximum stack footprint of the
 	  kernel and displays it in /sys/kernel/debug/tracing/stack_trace.
@@ -392,7 +394,7 @@ config DYNAMIC_FTRACE
 	bool "enable/disable function tracing dynamically"
 	depends on FUNCTION_TRACER
 	depends on HAVE_DYNAMIC_FTRACE
-	default y
+	default n
 	help
 	  This option will modify all the calls to function tracing
 	  dynamically (will patch them out of the binary image and