Merge branch 'tracking-llct-v3.9-misc-fixes' into merge-linux-linaro-core-trackingllct-20130312.0

5 files changed, 70 insertions, 16 deletions

diff --git a/arch/arm/kernel/ftrace.c b/arch/arm/kernel/ftrace.c
index 34e56647dcee..38b670cea08c 100644
--- a/arch/arm/kernel/ftrace.c
+++ b/arch/arm/kernel/ftrace.c
@@ -14,6 +14,7 @@
 
 #include <linux/ftrace.h>
 #include <linux/uaccess.h>
+#include <linux/stop_machine.h>
 
 #include <asm/cacheflush.h>
 #include <asm/opcodes.h>
@@ -156,6 +157,39 @@ int ftrace_make_nop(struct module *mod,
 	return ret;
 }
 
+struct afmc_data {
+	int command;
+	atomic_t cpu;
+	atomic_t done;
+};
+
+static int __arch_ftrace_modify_code(void *data)
+{
+	struct afmc_data *afmcd = data;
+
+	if (atomic_inc_return(&afmcd->cpu) == num_online_cpus()) {
+		/* Last cpu to get into this function does the actual work */
+		ftrace_modify_all_code(afmcd->command);
+		wmb();
+		atomic_set(&afmcd->done, true);
+	} else {
+		/* Other cpus wait for the code modifications to be done */
+		rmb();
+		while (!atomic_read(&afmcd->done))
+			cpu_relax();
+		/* Ensure icache is consistent with the code changes */
+		__flush_icache_all();
+	}
+
+	return 0;
+}
+
+void arch_ftrace_update_code(int command)
+{
+	struct afmc_data afmcd = { command };
+	stop_machine(__arch_ftrace_modify_code, &afmcd, cpu_online_mask);
+}
+
 int __init ftrace_dyn_arch_init(void *data)
 {
 	*(unsigned long *)data = 0;
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 978416dd31ca..5ecac2ae6fd3 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -222,11 +222,15 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)),                       \
 	$(echo-cmd) $(cmd_$(1));                                             \
 	echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
 
+ifeq ($(KBUILD_SCRIPTROOT),)
+KBUILD_SCRIPTROOT=.
+endif
+
 # Execute the command and also postprocess generated .d dependencies file.
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ),                  \
 	@set -e;                                                             \
 	$(echo-cmd) $(cmd_$(1));                                             \
-	scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
+	$(KBUILD_SCRIPTROOT)/scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
 	rm -f $(depfile);                                                    \
 	mv -f $(dot-target).tmp $(dot-target).cmd)
 
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 0e801c3cdaf8..641a7bbdaad9 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -290,13 +290,17 @@ cmd_record_mcount = 						\
 	fi;
 endif
 
+ifeq ($(KBUILD_SCRIPTROOT),)
+KBUILD_SCRIPTROOT=.
+endif
+
 define rule_cc_o_c
 	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
 	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
 	$(cmd_modversions)						  \
 	$(call echo-cmd,record_mcount)					  \
 	$(cmd_record_mcount)						  \
-	scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
+	$(KBUILD_SCRIPTROOT)/scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' >    \
 	                                              $(dot-target).tmp;  \
 	rm -f $(depfile);						  \
 	mv -f $(dot-target).tmp $(dot-target).cmd
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 231b4759c714..ea29352e16b8 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -14,6 +14,12 @@ endif
 # We need this, in case the user has it in its environment
 unexport CONFIG_
 
+ifdef KBUILD_SCRIPTROOT
+CONF = $(KBUILD_SCRIPTROOT)/scripts/kconfig/conf
+else
+CONF = $(obj)/conf
+endif
+
 xconfig: $(obj)/qconf
 	$< $(Kconfig)
 
@@ -23,31 +29,31 @@ gconfig: $(obj)/gconf
 menuconfig: $(obj)/mconf
 	$< $(Kconfig)
 
-config: $(obj)/conf
+config: $(CONF)
 	$< --oldaskconfig $(Kconfig)
 
 nconfig: $(obj)/nconf
 	$< $(Kconfig)
 
-oldconfig: $(obj)/conf
+oldconfig: $(CONF)
 	$< --$@ $(Kconfig)
 
-silentoldconfig: $(obj)/conf
+silentoldconfig: $(CONF)
 	$(Q)mkdir -p include/generated
 	$< --$@ $(Kconfig)
 
-localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
+localyesconfig localmodconfig: $(obj)/streamline_config.pl $(CONF)
 	$(Q)mkdir -p include/generated
 	$(Q)perl $< --$@ $(srctree) $(Kconfig) > .tmp.config
 	$(Q)if [ -f .config ]; then 					\
 			cmp -s .tmp.config .config ||			\
 			(mv -f .config .config.old.1;			\
 			 mv -f .tmp.config .config;			\
-			 $(obj)/conf --silentoldconfig $(Kconfig);	\
+			 $(CONF) --silentoldconfig $(Kconfig);	\
 			 mv -f .config.old.1 .config.old)		\
 	else								\
 			mv -f .tmp.config .config;			\
-			$(obj)/conf --silentoldconfig $(Kconfig);	\
+			$(CONF) --silentoldconfig $(Kconfig);	\
 	fi
 	$(Q)rm -f .tmp.config
 
@@ -76,24 +82,24 @@ update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h
 
 PHONY += allnoconfig allyesconfig allmodconfig alldefconfig randconfig
 
-allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(obj)/conf
+allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(CONF)
 	$< --$@ $(Kconfig)
 
 PHONY += listnewconfig olddefconfig oldnoconfig savedefconfig defconfig
 
-listnewconfig olddefconfig: $(obj)/conf
+listnewconfig olddefconfig: $(CONF)
 	$< --$@ $(Kconfig)
 
 # oldnoconfig is an alias of olddefconfig, because people already are dependent
 # on its behavior(sets new symbols to their default value but not 'n') with the
 # counter-intuitive name.
-oldnoconfig: $(obj)/conf
+oldnoconfig: $(CONF)
 	$< --olddefconfig $(Kconfig)
 
-savedefconfig: $(obj)/conf
+savedefconfig: $(CONF)
 	$< --$@=defconfig $(Kconfig)
 
-defconfig: $(obj)/conf
+defconfig: $(CONF)
 ifeq ($(KBUILD_DEFCONFIG),)
 	$< --defconfig $(Kconfig)
 else
@@ -101,7 +107,7 @@ else
 	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig)
 endif
 
-%_defconfig: $(obj)/conf
+%_defconfig: $(CONF)
 	$(Q)$< --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig)
 
 # Help text used by make help
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index 9415b5663364..01e783fb93d9 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -1,6 +1,12 @@
 hostprogs-y	:= modpost mk_elfconfig
 always		:= $(hostprogs-y) empty.o
 
+ifdef KBUILD_SCRIPTROOT
+MKELFCONFIG = $(KBUILD_SCRIPTROOT)/scripts/mod/mk_elfconfig
+else
+MKELFCONFIG = $(obj)/mk_elfconfig
+endif
+
 modpost-objs	:= modpost.o file2alias.o sumversion.o
 
 devicetable-offsets-file := devicetable-offsets.h
@@ -43,9 +49,9 @@ $(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
 $(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
 
 quiet_cmd_elfconfig = MKELF   $@
-      cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@
+      cmd_elfconfig = $(MKELFCONFIG) < $< > $@
 
-$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE
+$(obj)/elfconfig.h: $(obj)/empty.o $(MKELFCONFIG) FORCE
 	$(call if_changed,elfconfig)
 
 targets += elfconfig.h