arm64/efi: isolate EFI stub from the kernel proper

[linux-beck.git] / arch / arm64 / kernel / Makefile

diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
index 22dc9bc781be60d34f0285c7e7e295fe62e809dd..7b17f6245f1e27bd363789fb13ecab7a88d8b00b 100644 (file)
--- a/arch/arm64/kernel/Makefile
+++ b/arch/arm64/kernel/Makefile
@@ -20,6 +20,14 @@ arm64-obj-y          := debug-monitors.o entry.o irq.o fpsimd.o              \
                           cpufeature.o alternative.o cacheinfo.o               \
                           smp.o smp_spin_table.o topology.o
 
+stub-obj                               := efi-stub.o efi-entry.o
+extra-y                                        := $(stub-obj)
+stub-obj                               := $(patsubst %.o,%.stub.o,$(stub-obj))
+
+OBJCOPYFLAGS := --prefix-symbols=__efistub_
+$(obj)/%.stub.o: $(obj)/%.o FORCE
+       $(call if_changed,objcopy)
+
 arm64-obj-$(CONFIG_COMPAT)             += sys32.o kuser32.o signal32.o         \
                                           sys_compat.o entry32.o               \
                                           ../../arm/kernel/opcodes.o
@@ -32,7 +40,7 @@ arm64-obj-$(CONFIG_CPU_PM)            += sleep.o suspend.o
 arm64-obj-$(CONFIG_CPU_IDLE)           += cpuidle.o
 arm64-obj-$(CONFIG_JUMP_LABEL)         += jump_label.o
 arm64-obj-$(CONFIG_KGDB)               += kgdb.o
-arm64-obj-$(CONFIG_EFI)                        += efi.o efi-stub.o efi-entry.o
+arm64-obj-$(CONFIG_EFI)                        += efi.o $(stub-obj)
 arm64-obj-$(CONFIG_PCI)                        += pci.o
 arm64-obj-$(CONFIG_ARMV8_DEPRECATED)   += armv8_deprecated.o
 arm64-obj-$(CONFIG_ACPI)               += acpi.o
@@ -40,7 +48,7 @@ arm64-obj-$(CONFIG_ACPI)              += acpi.o
 obj-y                                  += $(arm64-obj-y) vdso/
 obj-m                                  += $(arm64-obj-m)
 head-y                                 := head.o
-extra-y                                        := $(head-y) vmlinux.lds
+extra-y                                        += $(head-y) vmlinux.lds
 
 # vDSO - this must be built first to generate the symbol offsets
 $(call objectify,$(arm64-obj-y)): $(obj)/vdso/vdso-offsets.h