3fd84a4fc0
An experimental patch series of mine reworks how warnings are processed
in Kbuild. A side effect is a new warning about a harmless aliasing
rule violation in an inline function:
In file included from
include/linux/rhashtable-types.h:15:0,
from include/linux/ipc.h:7,
from include/uapi/linux/sem.h:5,
from include/linux/sem.h:5,
from include/linux/sched.h:15,
from include/linux/uaccess.h:6,
from arch/parisc/boot/compressed/misc.c:7:
include/linux/workqueue.h: In function 'work_static':
include/linux/workqueue.h:212:2: warning: dereferencing
type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
return *work_data_bits(work) & WORK_STRUCT_STATIC;
Make the decompressor use -fno-strict-aliasing like the rest of
the kernel for consistency, and to ensure this warning never makes
it into a release.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Helge Deller <deller@gmx.de>
89 lines
2.7 KiB
Makefile
89 lines
2.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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#
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# linux/arch/parisc/boot/compressed/Makefile
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#
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# create a compressed self-extracting vmlinux image from the original vmlinux
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#
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KCOV_INSTRUMENT := n
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
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targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
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targets += misc.o piggy.o sizes.h head.o real2.o firmware.o
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targets += real2.S firmware.c
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KBUILD_CFLAGS := -D__KERNEL__ -O2 -DBOOTLOADER
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KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
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KBUILD_CFLAGS += -fno-strict-aliasing
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KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -fno-builtin-printf
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KBUILD_CFLAGS += -fno-PIE -mno-space-regs -mdisable-fpregs -Os
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ifndef CONFIG_64BIT
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KBUILD_CFLAGS += -mfast-indirect-calls
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endif
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OBJECTS += $(obj)/head.o $(obj)/real2.o $(obj)/firmware.o $(obj)/misc.o $(obj)/piggy.o
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LDFLAGS_vmlinux := -X -e startup --as-needed -T
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) $(LIBGCC)
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$(call if_changed,ld)
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sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\|parisc_kernel_start\)$$/\#define SZ\2 0x\1/p'
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quiet_cmd_sizes = GEN $@
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cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
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$(obj)/sizes.h: vmlinux
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$(call if_changed,sizes)
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AFLAGS_head.o += -I$(objtree)/$(obj) -DBOOTLOADER
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$(obj)/head.o: $(obj)/sizes.h
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CFLAGS_misc.o += -I$(objtree)/$(obj)
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$(obj)/misc.o: $(obj)/sizes.h
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$(obj)/firmware.o: $(obj)/firmware.c
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$(obj)/firmware.c: $(srctree)/arch/$(SRCARCH)/kernel/firmware.c
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$(call cmd,shipped)
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AFLAGS_real2.o += -DBOOTLOADER
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$(obj)/real2.o: $(obj)/real2.S
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$(obj)/real2.S: $(srctree)/arch/$(SRCARCH)/kernel/real2.S
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$(call cmd,shipped)
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$(obj)/misc.o: $(obj)/sizes.h
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CPPFLAGS_vmlinux.lds += -I$(objtree)/$(obj) -DBOOTLOADER
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$(obj)/vmlinux.lds: $(obj)/sizes.h
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OBJCOPYFLAGS_vmlinux.bin := -R .comment -R .note -S
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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vmlinux.bin.all-y := $(obj)/vmlinux.bin
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suffix-$(CONFIG_KERNEL_GZIP) := gz
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suffix-$(CONFIG_KERNEL_BZIP2) := bz2
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suffix-$(CONFIG_KERNEL_LZ4) := lz4
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suffix-$(CONFIG_KERNEL_LZMA) := lzma
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suffix-$(CONFIG_KERNEL_LZO) := lzo
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suffix-$(CONFIG_KERNEL_XZ) := xz
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$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
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$(call if_changed,gzip)
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$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)
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$(call if_changed,bzip2)
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$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y)
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$(call if_changed,lz4)
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$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
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$(call if_changed,lzma)
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$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
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$(call if_changed,lzo)
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$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
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$(call if_changed,xzkern)
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LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
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$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y)
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$(call if_changed,ld)
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