diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 15587ed9a361..87b659dadf3f 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -8,7 +8,8 @@ obj-y = bug.o bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
 
 obj-$(CONFIG_BINFMT_ELF) += elfcore.o
 
-subarch-obj-y = lib/rwsem.o lib/string_32.o
+subarch-obj-y = lib/string_32.o
+subarch-obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += lib/rwsem.o
 subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem_32.o
 subarch-obj-$(CONFIG_MODULES) += kernel/module.o
 
diff --git a/include/linux/irq.h b/include/linux/irq.h
index baa397eb9c33..5f695041090c 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -96,11 +96,6 @@ enum {
 
 #define IRQ_NO_BALANCING_MASK	(IRQ_PER_CPU | IRQ_NO_BALANCING)
 
-static inline __deprecated bool CHECK_IRQ_PER_CPU(unsigned int status)
-{
-	return status & IRQ_PER_CPU;
-}
-
 /*
  * Return value for chip->irq_set_affinity()
  *
diff --git a/init/Kconfig b/init/Kconfig
index 27b8a7a43261..e20aa3112240 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -917,6 +917,8 @@ config ANON_INODES
 
 menuconfig EXPERT
 	bool "Configure standard kernel features (expert users)"
+	# Unhide debug options, to make the on-by-default options visible
+	select DEBUG_KERNEL
 	help
 	  This option allows certain base kernel options and settings
           to be disabled or tweaked. This is for specialized
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index d0861bbd1d94..56d62d3fb167 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -52,7 +52,10 @@ ifeq ($(ARCH),i386)
 endif
 ifeq ($(ARCH),x86_64)
 	ARCH := x86
-	IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
+	IS_X86_64 := 0
+	ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
+		IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
+	endif
 	ifeq (${IS_X86_64}, 1)
 		RAW_ARCH := x86_64
 		ARCH_CFLAGS := -DARCH_X86_64