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6583327c4d
Commit d61931d89b, "x86: Add optimized popcnt variants" introduced
compile flag -fcall-saved-rdi for lib/hweight.c. When combined with
options -fprofile-arcs and -O2, this flag causes gcc to generate
broken constructor code. As a result, a 64 bit x86 kernel compiled
with CONFIG_GCOV_PROFILE_ALL=y prints message "gcov: could not create
file" and runs into sproadic BUGs during boot.
The gcc people indicate that these kinds of problems are endemic when
using ad hoc calling conventions. It is therefore best to treat any
file compiled with ad hoc calling conventions as an isolated
environment and avoid things like profiling or coverage analysis,
since those subsystems assume a "normal" calling conventions.
This patch avoids the bug by excluding lib/hweight.o from coverage
profiling.
Reported-by: Meelis Roos <mroos@linux.ee>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/52F3A30C.7050205@linux.vnet.ibm.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
192 lines
5.8 KiB
Makefile
192 lines
5.8 KiB
Makefile
#
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# Makefile for some libs needed in the kernel.
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#
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ifdef CONFIG_FUNCTION_TRACER
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
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endif
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lib-y := ctype.o string.o vsprintf.o cmdline.o \
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rbtree.o radix-tree.o dump_stack.o timerqueue.o\
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idr.o int_sqrt.o extable.o \
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sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \
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proportions.o flex_proportions.o prio_heap.o ratelimit.o show_mem.o \
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is_single_threaded.o plist.o decompress.o kobject_uevent.o \
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earlycpio.o
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obj-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
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lib-$(CONFIG_MMU) += ioremap.o
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lib-$(CONFIG_SMP) += cpumask.o
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lib-y += kobject.o klist.o
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obj-y += lockref.o
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obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
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bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
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gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o clz_ctz.o \
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bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \
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percpu-refcount.o percpu_ida.o
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obj-y += string_helpers.o
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obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
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obj-y += kstrtox.o
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obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
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ifeq ($(CONFIG_DEBUG_KOBJECT),y)
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CFLAGS_kobject.o += -DDEBUG
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CFLAGS_kobject_uevent.o += -DDEBUG
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endif
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obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
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obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
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obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
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obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
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obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
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GCOV_PROFILE_hweight.o := n
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CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))
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obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
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obj-$(CONFIG_BTREE) += btree.o
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obj-$(CONFIG_ASSOCIATIVE_ARRAY) += assoc_array.o
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obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
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obj-$(CONFIG_DEBUG_LIST) += list_debug.o
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obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o
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ifneq ($(CONFIG_HAVE_DEC_LOCK),y)
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lib-y += dec_and_lock.o
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endif
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obj-$(CONFIG_BITREVERSE) += bitrev.o
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obj-$(CONFIG_RATIONAL) += rational.o
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obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
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obj-$(CONFIG_CRC16) += crc16.o
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obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
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obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
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obj-$(CONFIG_CRC32) += crc32.o
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obj-$(CONFIG_CRC7) += crc7.o
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obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
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obj-$(CONFIG_CRC8) += crc8.o
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obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
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obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
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obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
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obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
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obj-$(CONFIG_BCH) += bch.o
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obj-$(CONFIG_LZO_COMPRESS) += lzo/
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obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
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obj-$(CONFIG_LZ4_COMPRESS) += lz4/
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obj-$(CONFIG_LZ4HC_COMPRESS) += lz4/
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obj-$(CONFIG_LZ4_DECOMPRESS) += lz4/
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obj-$(CONFIG_XZ_DEC) += xz/
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obj-$(CONFIG_RAID6_PQ) += raid6/
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lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
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lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
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lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
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lib-$(CONFIG_DECOMPRESS_XZ) += decompress_unxz.o
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lib-$(CONFIG_DECOMPRESS_LZO) += decompress_unlzo.o
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lib-$(CONFIG_DECOMPRESS_LZ4) += decompress_unlz4.o
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obj-$(CONFIG_TEXTSEARCH) += textsearch.o
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obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
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obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
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obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
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obj-$(CONFIG_SMP) += percpu_counter.o
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obj-$(CONFIG_AUDIT_GENERIC) += audit.o
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obj-$(CONFIG_SWIOTLB) += swiotlb.o
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obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
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obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
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obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
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obj-$(CONFIG_CPU_NOTIFIER_ERROR_INJECT) += cpu-notifier-error-inject.o
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obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
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obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o
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obj-$(CONFIG_OF_RECONFIG_NOTIFIER_ERROR_INJECT) += \
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of-reconfig-notifier-error-inject.o
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lib-$(CONFIG_GENERIC_BUG) += bug.o
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obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
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obj-$(CONFIG_DYNAMIC_DEBUG) += dynamic_debug.o
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obj-$(CONFIG_NLATTR) += nlattr.o
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obj-$(CONFIG_LRU_CACHE) += lru_cache.o
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obj-$(CONFIG_DMA_API_DEBUG) += dma-debug.o
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obj-$(CONFIG_GENERIC_CSUM) += checksum.o
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obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o
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obj-$(CONFIG_ATOMIC64_SELFTEST) += atomic64_test.o
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obj-$(CONFIG_AVERAGE) += average.o
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obj-$(CONFIG_CPU_RMAP) += cpu_rmap.o
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obj-$(CONFIG_CORDIC) += cordic.o
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obj-$(CONFIG_DQL) += dynamic_queue_limits.o
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obj-$(CONFIG_MPILIB) += mpi/
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obj-$(CONFIG_SIGNATURE) += digsig.o
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obj-$(CONFIG_CLZ_TAB) += clz_tab.o
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obj-$(CONFIG_DDR) += jedec_ddr_data.o
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obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
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obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
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obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o
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obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
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libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o
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$(foreach file, $(libfdt_files), \
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$(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt))
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lib-$(CONFIG_LIBFDT) += $(libfdt_files)
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obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o
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obj-$(CONFIG_INTERVAL_TREE_TEST) += interval_tree_test.o
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interval_tree_test-objs := interval_tree_test_main.o interval_tree.o
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obj-$(CONFIG_PERCPU_TEST) += percpu_test.o
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obj-$(CONFIG_ASN1) += asn1_decoder.o
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obj-$(CONFIG_FONT_SUPPORT) += fonts/
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hostprogs-y := gen_crc32table
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clean-files := crc32table.h
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$(obj)/crc32.o: $(obj)/crc32table.h
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quiet_cmd_crc32 = GEN $@
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cmd_crc32 = $< > $@
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$(obj)/crc32table.h: $(obj)/gen_crc32table
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$(call cmd,crc32)
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#
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# Build a fast OID lookip registry from include/linux/oid_registry.h
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#
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obj-$(CONFIG_OID_REGISTRY) += oid_registry.o
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$(obj)/oid_registry.o: $(obj)/oid_registry_data.c
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$(obj)/oid_registry_data.c: $(srctree)/include/linux/oid_registry.h \
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$(src)/build_OID_registry
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$(call cmd,build_OID_registry)
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quiet_cmd_build_OID_registry = GEN $@
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cmd_build_OID_registry = perl $(srctree)/$(src)/build_OID_registry $< $@
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clean-files += oid_registry_data.c
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obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
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