powerpc/Makefiles: Convert ifeq to ifdef where possible

In Makefiles if we're testing a CONFIG_FOO symbol for equality with 'y'
we can instead just use ifdef. The latter reads easily, so convert to
it where possible.

Signed-off-by: Rodrigo R. Galvao <rosattig@linux.vnet.ibm.com>
Reviewed-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/Makefile

@@ -36,7 +36,7 @@ else
 KBUILD_DEFCONFIG := ppc64_defconfig
 endif
 
-ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_PPC64
 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
 
 ifeq ($(new_nm),y)
@@ -74,7 +74,7 @@ KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 endif
 endif
 
-ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
+ifdef CONFIG_CPU_LITTLE_ENDIAN
 KBUILD_CFLAGS	+= -mlittle-endian
 LDFLAGS		+= -EL
 LDEMULATION	:= lppc
@@ -117,7 +117,7 @@ LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-y)
 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
 
-ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_PPC64
 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 	# -mcmodel=medium breaks modules because it uses 32bit offsets from
 	# the TOC pointer to create pointers where possible. Pointers into the
@@ -134,7 +134,7 @@ endif
 endif
 
 CFLAGS-$(CONFIG_PPC64)	:= $(call cc-option,-mtraceback=no)
-ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
+ifdef CONFIG_CPU_LITTLE_ENDIAN
 CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 AFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mabi=elfv2)
 else
@@ -148,8 +148,8 @@ CFLAGS-$(CONFIG_PPC64)	+= $(call cc-option,-mno-pointers-to-nested-functions)
 CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 $(MULTIPLEWORD)
 CFLAGS-$(CONFIG_PPC32)	+= $(call cc-option,-mno-readonly-in-sdata)
 
-ifeq ($(CONFIG_PPC_BOOK3S_64),y)
-ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
+ifdef CONFIG_PPC_BOOK3S_64
+ifdef CONFIG_CPU_LITTLE_ENDIAN
 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
 else
@@ -173,16 +173,16 @@ CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9)
 CFLAGS-$(CONFIG_PPC_8xx) += $(call cc-option,-mcpu=860)
 
 # Altivec option not allowed with e500mc64 in GCC.
-ifeq ($(CONFIG_ALTIVEC),y)
+ifdef CONFIG_ALTIVEC
 E5500_CPU := -mcpu=powerpc64
 else
 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 endif
 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 
-ifeq ($(CONFIG_PPC32),y)
-ifeq ($(CONFIG_PPC_E500MC),y)
+ifdef CONFIG_PPC32
+ifdef CONFIG_PPC_E500MC
 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 else
 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
@@ -204,7 +204,7 @@ else
 CHECKFLAGS	+= -D__LITTLE_ENDIAN__
 endif
 
-ifeq ($(CONFIG_476FPE_ERR46),y)
+ifdef CONFIG_476FPE_ERR46
 	KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 		-T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 endif
@@ -231,12 +231,12 @@ KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)
 # often slow when they are implemented at all
 KBUILD_CFLAGS		+= $(call cc-option,-mno-string)
 
-ifeq ($(CONFIG_6xx),y)
+ifdef CONFIG_6xx
 KBUILD_CFLAGS		+= -mcpu=powerpc
 endif
 
 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
-ifeq ($(CONFIG_FUNCTION_TRACER),y)
+ifdef CONFIG_FUNCTION_TRACER
 KBUILD_CFLAGS		+= -mno-sched-epilog
 endif
 
@@ -395,7 +395,7 @@ install:
 	$(Q)$(MAKE) $(build)=$(boot) install
 
 vdso_install:
-ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_PPC64
 	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 endif
 	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

arch/powerpc/boot/Makefile

@@ -354,7 +354,7 @@ image-$(CONFIG_AMIGAONE)		+= cuImage.amigaone
 
 # For 32-bit powermacs, build the COFF and miboot images
 # as well as the ELF images.
-ifeq ($(CONFIG_PPC32),y)
+ifdef CONFIG_PPC32
 image-$(CONFIG_PPC_PMAC)	+= zImage.coff zImage.miboot
 endif
 

arch/powerpc/kernel/Makefile

@@ -7,10 +7,10 @@ CFLAGS_ptrace.o		+= -DUTS_MACHINE='"$(UTS_MACHINE)"'
 
 subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
 
-ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_PPC64
 CFLAGS_prom_init.o	+= $(NO_MINIMAL_TOC)
 endif
-ifeq ($(CONFIG_PPC32),y)
+ifdef CONFIG_PPC32
 CFLAGS_prom_init.o      += -fPIC
 CFLAGS_btext.o		+= -fPIC
 endif
@@ -63,13 +63,13 @@ obj-$(CONFIG_EEH)              += eeh.o eeh_pe.o eeh_dev.o eeh_cache.o \
 obj-$(CONFIG_GENERIC_TBSYNC)	+= smp-tbsync.o
 obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
 obj-$(CONFIG_FA_DUMP)		+= fadump.o
-ifeq ($(CONFIG_PPC32),y)
+ifdef CONFIG_PPC32
 obj-$(CONFIG_E500)		+= idle_e500.o
 endif
 obj-$(CONFIG_6xx)		+= idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o
 obj-$(CONFIG_TAU)		+= tau_6xx.o
 obj-$(CONFIG_HIBERNATION)	+= swsusp.o suspend.o
-ifeq ($(CONFIG_FSL_BOOKE),y)
+ifdef CONFIG_FSL_BOOKE
 obj-$(CONFIG_HIBERNATION)	+= swsusp_booke.o
 else
 obj-$(CONFIG_HIBERNATION)	+= swsusp_$(BITS).o
@@ -110,9 +110,11 @@ obj-$(CONFIG_PCI_MSI)		+= msi.o
 obj-$(CONFIG_KEXEC_CORE)	+= machine_kexec.o crash.o \
 				   machine_kexec_$(BITS).o
 obj-$(CONFIG_KEXEC_FILE)	+= machine_kexec_file_$(BITS).o kexec_elf_$(BITS).o
-ifeq ($(CONFIG_HAVE_IMA_KEXEC)$(CONFIG_IMA),yy)
+ifdef CONFIG_HAVE_IMA_KEXEC
+ifdef CONFIG_IMA
 obj-y				+= ima_kexec.o
 endif
+endif
 
 obj-$(CONFIG_AUDIT)		+= audit.o
 obj64-$(CONFIG_AUDIT)		+= compat_audit.o
@@ -165,7 +167,7 @@ PHONY += systbl_chk
 systbl_chk: $(src)/systbl_chk.sh $(obj)/systbl_chk.i
 	$(call cmd,systbl_chk)
 
-ifeq ($(CONFIG_PPC_OF_BOOT_TRAMPOLINE),y)
+ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE
 $(obj)/built-in.a:		prom_init_check
 
 quiet_cmd_prom_init_check = CALL    $<

arch/powerpc/mm/Makefile

@@ -19,7 +19,7 @@ obj-$(CONFIG_PPC_BOOK3S_64)	+= pgtable-hash64.o hash_utils_64.o slb_low.o slb.o
 obj-$(CONFIG_PPC_RADIX_MMU)	+= pgtable-radix.o tlb-radix.o
 obj-$(CONFIG_PPC_STD_MMU_32)	+= ppc_mmu_32.o hash_low_32.o mmu_context_hash32.o
 obj-$(CONFIG_PPC_STD_MMU)	+= tlb_hash$(BITS).o
-ifeq ($(CONFIG_PPC_BOOK3S_64),y)
+ifdef CONFIG_PPC_BOOK3S_64
 obj-$(CONFIG_PPC_4K_PAGES)	+= hash64_4k.o
 obj-$(CONFIG_PPC_64K_PAGES)	+= hash64_64k.o
 endif
@@ -31,7 +31,7 @@ obj-$(CONFIG_NEED_MULTIPLE_NODES) += numa.o
 obj-$(CONFIG_PPC_SPLPAR)	+= vphn.o
 obj-$(CONFIG_PPC_MM_SLICES)	+= slice.o
 obj-y				+= hugetlbpage.o
-ifeq ($(CONFIG_HUGETLB_PAGE),y)
+ifdef CONFIG_HUGETLB_PAGE
 obj-$(CONFIG_PPC_BOOK3S_64)	+= hugetlbpage-hash64.o
 obj-$(CONFIG_PPC_RADIX_MMU)	+= hugetlbpage-radix.o
 obj-$(CONFIG_PPC_BOOK3E_MMU)	+= hugetlbpage-book3e.o

arch/powerpc/net/Makefile

@@ -2,7 +2,7 @@
 #
 # Arch-specific network modules
 #
-ifeq ($(CONFIG_PPC64),y)
+ifdef CONFIG_PPC64
 obj-$(CONFIG_BPF_JIT) += bpf_jit_comp64.o
 else
 obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o

arch/powerpc/platforms/52xx/Makefile

@@ -11,7 +11,7 @@ obj-$(CONFIG_PPC_LITE5200)	+= lite5200.o
 obj-$(CONFIG_PPC_MEDIA5200)	+= media5200.o
 
 obj-$(CONFIG_PM)		+= mpc52xx_sleep.o mpc52xx_pm.o
-ifeq ($(CONFIG_PPC_LITE5200),y)
+ifdef CONFIG_PPC_LITE5200
 	obj-$(CONFIG_PM)	+= lite5200_sleep.o lite5200_pm.o
 endif
 

arch/powerpc/platforms/cell/Makefile

@@ -10,7 +10,7 @@ obj-$(CONFIG_CBE_CPUFREQ_SPU_GOVERNOR)	+= cpufreq_spudemand.o
 
 obj-$(CONFIG_PPC_IBM_CELL_POWERBUTTON)	+= cbe_powerbutton.o
 
-ifeq ($(CONFIG_SMP),y)
+ifdef CONFIG_SMP
 obj-$(CONFIG_PPC_CELL_NATIVE)		+= smp.o
 endif
 

arch/powerpc/platforms/pseries/Makefile

@@ -25,6 +25,6 @@ obj-$(CONFIG_LPARCFG)		+= lparcfg.o
 obj-$(CONFIG_IBMVIO)		+= vio.o
 obj-$(CONFIG_IBMEBUS)		+= ibmebus.o
 
-ifeq ($(CONFIG_PPC_PSERIES),y)
+ifdef CONFIG_PPC_PSERIES
 obj-$(CONFIG_SUSPEND)		+= suspend.o
 endif

arch/powerpc/sysdev/Makefile

@@ -48,7 +48,7 @@ obj-$(CONFIG_UCODE_PATCH)	+= micropatch.o
 obj-$(CONFIG_PPC_MPC512x)	+= mpc5xxx_clocks.o
 obj-$(CONFIG_PPC_MPC52xx)	+= mpc5xxx_clocks.o
 
-ifeq ($(CONFIG_SUSPEND),y)
+ifdef CONFIG_SUSPEND
 obj-$(CONFIG_6xx)		+= 6xx-suspend.o
 endif