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linux-next/arch/parisc/Makefile
John David Anglin d26a7730b5 parisc: Only use -mfast-indirect-calls option for 32-bit kernel builds 
In spite of what the GCC manual says, the -mfast-indirect-calls has
never been supported in the 64-bit parisc compiler. Indirect calls have
always been done using function descriptors irrespective of the
-mfast-indirect-calls option.

Recently, it was noticed that a function descriptor was always requested
when the -mfast-indirect-calls option was specified. This caused
problems when the option was used in  application code and doesn't make
any sense because the whole point of the option is to avoid using a
function descriptor for indirect calls.

Fixing this broke 64-bit kernel builds.

I will fix GCC but for now we need the attached change. This results in
the same kernel code as before.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Cc: stable@vger.kernel.org  # v3.0+
Signed-off-by: Helge Deller <deller@gmx.de>
2014-09-23 21:38:26 +02:00

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Makefile
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#
# parisc/Makefile
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" and "archdep" for cleaning up and making dependencies for
# this architecture
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994 by Linus Torvalds
# Portions Copyright (C) 1999 The Puffin Group
#
# Modified for PA-RISC Linux by Paul Lahaie, Alex deVries,
# Mike Shaver, Helge Deller and Martin K. Petersen
#
KBUILD_IMAGE := vmlinuz
KBUILD_DEFCONFIG := default_defconfig
NM = sh $(srctree)/arch/parisc/nm
CHECKFLAGS += -D__hppa__=1
LIBGCC = $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
ifdef CONFIG_64BIT
UTS_MACHINE := parisc64
CHECKFLAGS += -D__LP64__=1 -m64
CC_ARCHES = hppa64
else # 32-bit
CC_ARCHES = hppa hppa2.0 hppa1.1
endif
ifneq ($(SUBARCH),$(UTS_MACHINE))
ifeq ($(CROSS_COMPILE),)
CC_SUFFIXES = linux linux-gnu unknown-linux-gnu
CROSS_COMPILE := $(call cc-cross-prefix, \
$(foreach a,$(CC_ARCHES), \
$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
endif
endif
OBJCOPY_FLAGS =-O binary -R .note -R .comment -S
cflags-y := -pipe
# These flags should be implied by an hppa-linux configuration, but they
# are not in gcc 3.2.
cflags-y += -mno-space-regs
# -mfast-indirect-calls is only relevant for 32-bit kernels.
ifndef CONFIG_64BIT
cflags-y += -mfast-indirect-calls
endif
# Currently we save and restore fpregs on all kernel entry/interruption paths.
# If that gets optimized, we might need to disable the use of fpregs in the
# kernel.
cflags-y += -mdisable-fpregs
# Without this, "ld -r" results in .text sections that are too big
# (> 0x40000) for branches to reach stubs.
ifndef CONFIG_FUNCTION_TRACER
cflags-y += -ffunction-sections
endif
# Use long jumps instead of long branches (needed if your linker fails to
# link a too big vmlinux executable). Not enabled for building modules.
ifdef CONFIG_MLONGCALLS
KBUILD_CFLAGS_KERNEL += -mlong-calls
endif
# select which processor to optimise for
cflags-$(CONFIG_PA7000) += -march=1.1 -mschedule=7100
cflags-$(CONFIG_PA7200) += -march=1.1 -mschedule=7200
cflags-$(CONFIG_PA7100LC) += -march=1.1 -mschedule=7100LC
cflags-$(CONFIG_PA7300LC) += -march=1.1 -mschedule=7300
cflags-$(CONFIG_PA8X00) += -march=2.0 -mschedule=8000
head-y := arch/parisc/kernel/head.o
KBUILD_CFLAGS += $(cflags-y)
kernel-y := mm/ kernel/ math-emu/
kernel-$(CONFIG_HPUX) += hpux/
core-y += $(addprefix arch/parisc/, $(kernel-y))
libs-y += arch/parisc/lib/ $(LIBGCC)
drivers-$(CONFIG_OPROFILE) += arch/parisc/oprofile/
PALO := $(shell if (which palo 2>&1); then : ; \
elif [ -x /sbin/palo ]; then echo /sbin/palo; \
fi)
PALOCONF := $(shell if [ -f $(src)/palo.conf ]; then echo $(src)/palo.conf; \
else echo $(obj)/palo.conf; \
fi)
palo lifimage: vmlinuz
@if test ! -x "$(PALO)"; then \
echo 'ERROR: Please install palo first (apt-get install palo)';\
echo 'or build it from source and install it somewhere in your $$PATH';\
false; \
fi
@if test ! -f "$(PALOCONF)"; then \
cp $(src)/arch/parisc/defpalo.conf $(obj)/palo.conf; \
echo 'A generic palo config file ($(obj)/palo.conf) has been created for you.'; \
echo 'You should check it and re-run "make palo".'; \
echo 'WARNING: the "lifimage" file is now placed in this directory by default!'; \
false; \
fi
$(PALO) -f $(PALOCONF)
BOOT_TARGETS = zImage Image palo lifimage
INSTALL_TARGETS = zinstall install
PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
bzImage zImage: vmlinuz
Image: vmlinux
vmlinuz: vmlinux
@gzip -cf -9 $< > $@
install:
$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
$(KERNELRELEASE) vmlinux System.map "$(INSTALL_PATH)"
zinstall:
$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
$(KERNELRELEASE) vmlinuz System.map "$(INSTALL_PATH)"
CLEAN_FILES += lifimage
MRPROPER_FILES += palo.conf
define archhelp
@echo '* vmlinux - Uncompressed kernel image (./vmlinux)'
@echo ' vmlinuz - Compressed kernel image (./vmlinuz)'
@echo ' palo - Bootable image (./lifimage)'
@echo ' install - Install uncompressed vmlinux kernel using'
@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
@echo ' copy to $$(INSTALL_PATH)'
@echo ' zinstall - Install compressed vmlinuz kernel'
endef
# we require gcc 3.3 or above to compile the kernel
archprepare: checkbin
checkbin:
@if test "$(call cc-version)" -lt "0303"; then \
echo -n "Sorry, GCC v3.3 or above is required to build " ; \
echo "the kernel." ; \
false ; \
fi
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